During my master, my PhD and my first postdoc position, I worked on research in optical quantum information processing, quantum communication, quantum computation, multi-photon entanglement and nonlinear optical imaging. As a senior postdoc and senior researcher I led efforts towards the realization of a dedicated space mission to test the foundations of quantum physics, and to use quantum optomechanics for high-precision sensing in space. In 2019, I started my own research group, and my research is centered on quantum optics, quantum communication, optical quantum computing, entanglement generation, non-linear optics, quantum optomechanics, and the development of technologies for experiments in space and microgravity. In recent years, I have concentrated on the application of quantum technology to quantum networks, specifically focusing on the creation of narrow-band entangled photon sources to facilitate coupling photons to quantum memories and optomechanical systems.
EDUCATION
2020: Habilitation (postdoctoral degree), University of Ljubljana, Slovenia
2019: Habilitation (postdoctoral degree), University of Vienna, Austria
2008: PhD, Faculty of Physics, University of Vienna, Austria, Supervisor: Anton Zeilinger
2003: Master, Faculty of Physics, University of Vienna, Austria, Supervisor: Anton Zeilinger
RESEARCH, TEACHING, or OTHER INTERESTS
Atomic and Molecular Physics, and Optics
56
Scopus Publications
5672
Scholar Citations
29
Scholar h-index
38
Scholar i10-index
Scopus Publications
Designing a compact cavity-enhanced source of entangled photons Žiga Pušavec, Lara Ulčakar, Rainer Kaltenbaek Physical Review A, 2025 Entanglement will be the key resource of future large-scale quantum networks, enabling quantum communication and advanced quantum applications like distributed quantum sensing and distributed quantum computing. To this end, entanglement will have to be distributed over large distances and efficiently coupled to quantum devices at the network nodes. This requires the entangled photons to have wavelengths and bandwidths compatible with the quantum memories in quantum repeater nodes or quantum devices at client nodes. Here, we present a cavity-enhanced source design using two nonlinear crystals inside a single cavity. We provide detailed considerations balancing the complexity of the cavity design with the photon bandwidth and the entanglement quality. Published by the American Physical Society 2025
Deploying an Inter-European Quantum Network Domenico Ribezzo, Mujtaba Zahidy, Ilaria Vagniluca, Nicola Biagi, Saverio Francesconi, Tommaso Occhipinti, Leif K. Oxenløwe, Martin Lončarić, Ivan Cvitić, Mario Stipčević, Žiga Pušavec, Rainer Kaltenbaek, Anton Ramšak, Francesco Cesa, Giorgio Giorgetti, Francesco Scazza, Angelo Bassi, Paolo De Natale, Francesco Saverio Cataliotti, Massimo Inguscio, Davide Bacco, Alessandro Zavatta Advanced Quantum Technologies, 2023 Around 40 years have passed since the first pioneering works introduced the possibility of using quantum physics to enhance communications safety. Nowadays, quantum key distribution (QKD) exited the physics laboratories to become a mature technology, triggering the attention of States, military forces, banks, and private corporations. This work takes on the challenge of bringing QKD closer to a consumer technology: deployed optical fibers by telecommunication companies of different States have been used to realize a quantum network, the first‐ever connecting three different countries. This work also emphasizes the necessity of networks where QKD can come up besides classical communications, whose coexistence currently represents the main limitation of this technology. This network connects Trieste to Rijeka and Ljubljana via a trusted node in Postojna. A key rate of over 3 kbps in the shortest link and a 7‐hour‐long measurement demonstrate the system's stability and reliability. The network has been used to present the QKD at the G20 Digital Ministers' Meeting in Trieste. The experimental results, together with the interest that one of the most important events of international politics has attracted, showcase the maturity of the QKD technology bundle, placing it in the spotlight for consumer applications in the near term.
Research campaign: Macroscopic quantum resonators (MAQRO) Rainer Kaltenbaek, Markus Arndt, Markus Aspelmeyer, Peter F Barker, Angelo Bassi, James Bateman, Alessio Belenchia, Joel Bergé, Claus Braxmaier, Sougato Bose, Bruno Christophe, Garrett D Cole, Catalina Curceanu, Animesh Datta, Maxime Debiossac, Uroš Delić, Lajos Diósi, Andrew A Geraci, Stefan Gerlich, Christine Guerlin, Gerald Hechenblaikner, Antoine Heidmann, Sven Herrmann, Klaus Hornberger, Ulrich Johann, Nikolai Kiesel, Claus Lämmerzahl, Thomas W LeBrun, Gerard J Milburn, James Millen, Makan Mohageg, David C Moore, Gavin W Morley, Stefan Nimmrichter, Lukas Novotny, Daniel K L Oi, Mauro Paternostro, C Jess Riedel, Manuel Rodrigues, Loïc Rondin, Albert Roura, Wolfgang P Schleich, Thilo Schuldt, Benjamin A Stickler, Hendrik Ulbricht, Christian Vogt, Lisa Wörner Quantum Science and Technology, 2023 The objective of the proposed macroscopic quantum resonators (MAQRO) mission is to harness space for achieving long free-fall times, extreme vacuum, nano-gravity, and cryogenic temperatures to test the foundations of physics in macroscopic quantum experiments at the interface with gravity. Developing the necessary technologies, achieving the required sensitivities and providing the necessary isolation of macroscopic quantum systems from their environment will lay the path for developing novel quantum sensors. Earlier studies showed that the proposal is feasible but that several critical challenges remain, and key technologies need to be developed. Recent scientific and technological developments since the original proposal of MAQRO promise the potential for achieving additional science objectives. The proposed research campaign aims to advance the state of the art and to perform the first macroscopic quantum experiments in space. Experiments on the ground, in micro-gravity, and in space will drive the proposed research campaign during the current decade to enable the implementation of MAQRO within the subsequent decade.
Cold atoms in space: community workshop summary and proposed road-map Iván Alonso, Cristiano Alpigiani, Brett Altschul, Henrique Araújo, Gianluigi Arduini, Jan Arlt, Leonardo Badurina, Antun Balaž, Satvika Bandarupally, Barry C. Barish, Michele Barone, Michele Barsanti, Steven Bass, Angelo Bassi, Baptiste Battelier, Charles F. A. Baynham, Quentin Beaufils, Aleksandar Belić, Joel Bergé, Jose Bernabeu, Andrea Bertoldi, Robert Bingham, Sébastien Bize, Diego Blas, Kai Bongs, Philippe Bouyer, Carla Braitenberg, Christian Brand, Claus Braxmaier, Alexandre Bresson, Oliver Buchmueller, Dmitry Budker, Luís Bugalho, Sergey Burdin, Luigi Cacciapuoti, Simone Callegari, Xavier Calmet, Davide Calonico, Benjamin Canuel, Laurentiu-Ioan Caramete, Olivier Carraz, Donatella Cassettari, Pratik Chakraborty, Swapan Chattopadhyay, Upasna Chauhan, Xuzong Chen, Yu-Ao Chen, Maria Luisa Chiofalo, Jonathon Coleman, Robin Corgier, J. P. Cotter, A. Michael Cruise, Yanou Cui, Gavin Davies, Albert De Roeck, Marcel Demarteau, Andrei Derevianko, Marco Di Clemente, Goran S. Djordjevic, Sandro Donadi, Olivier Doré, Peter Dornan, Michael Doser, Giannis Drougakis, Jacob Dunningham, Sajan Easo, Joshua Eby, Gedminas Elertas, John Ellis, David Evans, Pandora Examilioti, Pavel Fadeev, Mattia Fanì, Farida Fassi, Marco Fattori, Michael A. Fedderke, Daniel Felea, Chen-Hao Feng, Jorge Ferreras, Robert Flack, Victor V. Flambaum, René Forsberg, Mark Fromhold, Naceur Gaaloul, Barry M. Garraway, Maria Georgousi, Andrew Geraci, Kurt Gibble, Valerie Gibson, Patrick Gill, Gian F. Giudice, Jon Goldwin, Oliver Gould, Oleg Grachov, Peter W. Graham, Dario Grasso, Paul F. Griffin, Christine Guerlin, Mustafa Gündoğan, Ratnesh K. Gupta, Martin Haehnelt, Ekim T. Hanımeli, Leonie Hawkins, Aurélien Hees, Victoria A. Henderson, Waldemar Herr, Sven Herrmann, Thomas Hird, Richard Hobson, Vincent Hock, Jason M. Hogan, Bodil Holst, Michael Holynski, Ulf Israelsson, Peter Jeglič, Philippe Jetzer, Gediminas Juzeliūnas, Rainer Kaltenbaek, Jernej F. Kamenik, Alex Kehagias, Teodora Kirova, Marton Kiss-Toth, Sebastian Koke, Shimon Kolkowitz, Georgy Kornakov, Tim Kovachy, Markus Krutzik, Mukesh Kumar, Pradeep Kumar, Claus Lämmerzahl, Greg Landsberg, Christophe Le Poncin-Lafitte, David R. Leibrandt, Thomas Lévèque, Marek Lewicki, Rui Li, Anna Lipniacka, Christian Lisdat, Mia Liu, J. L. Lopez-Gonzalez, Sina Loriani, Jorma Louko, Giuseppe Gaetano Luciano, Nathan Lundblad, Steve Maddox, M. A. Mahmoud, Azadeh Maleknejad, John March-Russell, Didier Massonnet, Christopher McCabe, Matthias Meister, Tadej Mežnaršič, Salvatore Micalizio, Federica Migliaccio, Peter Millington, Milan Milosevic, Jeremiah Mitchell, Gavin W. Morley, Jürgen Müller, Eamonn Murphy, Özgür E. Müstecaplıoğlu, Val O’Shea, Daniel K. L. Oi, Judith Olson, Debapriya Pal, Dimitris G. Papazoglou, Elizabeth Pasatembou, Mauro Paternostro, Krzysztof Pawlowski, Emanuele Pelucchi, Franck Pereira dos Santos, Achim Peters, Igor Pikovski, Apostolos Pilaftsis, Alexandra Pinto, Marco Prevedelli, Vishnupriya Puthiya-Veettil, John Quenby, Johann Rafelski, Ernst M. Rasel, Cornelis Ravensbergen, Mirko Reguzzoni, Andrea Richaud, Isabelle Riou, Markus Rothacher, Albert Roura, Andreas Ruschhaupt, Dylan O. Sabulsky, Marianna Safronova, Ippocratis D. Saltas, Leonardo Salvi, Muhammed Sameed, Pandey Saurabh, Stefan Schäffer, Stephan Schiller, Manuel Schilling, Vladimir Schkolnik, Dennis Schlippert, Piet O. Schmidt, Harald Schnatz, Jean Schneider, Ulrich Schneider, Florian Schreck, Christian Schubert, Armin Shayeghi, Nathaniel Sherrill, Ian Shipsey, Carla Signorini, Rajeev Singh, Yeshpal Singh, Constantinos Skordis, Augusto Smerzi, Carlos F. Sopuerta, Fiodor Sorrentino, Paraskevas Sphicas, Yevgeny V. Stadnik, Petruta Stefanescu, Marco G. Tarallo, Silvia Tentindo, Guglielmo M. Tino, Jonathan N. Tinsley, Vincenza Tornatore, Philipp Treutlein, Andrea Trombettoni, Yu-Dai Tsai, Philip Tuckey, Melissa A. Uchida, Tristan Valenzuela, Mathias Van Den Bossche, Ville Vaskonen, Gunjan Verma, Flavio Vetrano, Christian Vogt, Wolf von Klitzing, Pierre Waller, Reinhold Walser, Eric Wille, Jason Williams, Patrick Windpassinger, Ulrich Wittrock, Peter Wolf, Marian Woltmann, Lisa Wörner, André Xuereb, Mohamed Yahia, Efe Yazgan, Nan Yu, Nassim Zahzam, Emmanuel Zambrini Cruzeiro, Mingsheng Zhan, Xinhao Zou, Jure Zupan, Erik Zupanič EPJ Quantum Technology, 2022 We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, and atom interferometers. Prospective applications include metrology, geodesy and measurement of terrestrial mass change due to, e.g., climate change, and fundamental science experiments such as tests of the equivalence principle, searches for dark matter, measurements of gravitational waves and tests of quantum mechanics. We review the current status of cold atom technologies and outline the requirements for their space qualification, including the development paths and the corresponding technical milestones, and identifying possible pathfinder missions to pave the way for missions to exploit the full potential of cold atoms in space. Finally, we present a first draft of a possible road-map for achieving these goals, that we propose for discussion by the interested cold atom, Earth Observation, fundamental physics and other prospective scientific user communities, together with the European Space Agency (ESA) and national space and research funding agencies.
Quantum physics in space Alessio Belenchia, Matteo Carlesso, Ömer Bayraktar, Daniele Dequal, Ivan Derkach, Giulio Gasbarri, Waldemar Herr, Ying Lia Li, Markus Rademacher, Jasminder Sidhu, Daniel K.L. Oi, Stephan T. Seidel, Rainer Kaltenbaek, Christoph Marquardt, Hendrik Ulbricht, Vladyslav C. Usenko, Lisa Wörner, André Xuereb, Mauro Paternostro, Angelo Bassi Physics Reports, 2022 Advances in quantum technologies are giving rise to a revolution in the way fundamental physics questions are explored at the empirical level. At the same time, they are the seeds for future disruptive technological applications of quantum physics. Remarkably, a space-based environment may open many new avenues for exploring and employing quantum physics and technologies. Recently, space missions employing quantum technologies for fundamental or applied studies have been proposed and implemented with stunning results. The combination of quantum physics and its space application is the focus of this review: we cover both the fundamental scientific questions that can be tackled with quantum technologies in space and the possible implementation of these technologies for a variety of academic and commercial purposes.
Feasibility considerations for free-fall tests of gravitational decoherence R. Kaltenbaek Avs Quantum Science, 2022 Space offers exciting opportunities to test the foundations of quantum physics using macroscopic quantum superpositions. It has been proposed to perform such tests in a dedicated space mission (MAQRO) using matter-wave interferometry with massive test particles or monitoring how the wave function of a test particle expands over time. Such experiments could test quantum physics with sufficiently high precision to resolve potential deviations from its unitary evolution due to gravitational decoherence. For example, such deviations have been predicted by the Diósi–Penrose (DP) model and the Károlyházy (K) model. The former predicts the collapse of massive or large superpositions due to a nonlinear modification of quantum evolution. The latter predicts decoherence because of an underlying uncertainty of space time. Potential advantages of a space environment are (1) long free-fall times, (2) low noise, and (3) taking a high number of data points over several years in a dedicated space mission. In contrast to interferometric tests, monitoring wave function expansion is less complex, but it does face some practical limitations. Here, we will discuss limitations of such non-interferometric experiments due to the limited number of data points achievable during a mission lifetime. Our results show that it will require an interferometric approach to conclusively test for gravitational decoherence as predicted by the DP or K models. In honor of the Nobel prize of Sir Roger Penrose, we will focus our discussion on the Diósi–Penrose model.
Towards a European quantum network 2022 European Conference on Optical Communication ECOC 2022, 2022
Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles Giulio Gasbarri, Alessio Belenchia, Matteo Carlesso, Sandro Donadi, Angelo Bassi, Rainer Kaltenbaek, Mauro Paternostro, Hendrik Ulbricht Communications Physics, 2021 Quantum technologies are opening novel avenues for applied and fundamental science at an impressive pace. In this perspective article, we focus on the promises coming from the combination of quantum technologies and space science to test the very foundations of quantum physics and, possibly, new physics. In particular, we survey the field of mesoscopic superpositions of nanoparticles and the potential of interferometric and non-interferometric experiments in space for the investigation of the superposition principle of quantum mechanics and the quantum-to-classical transition. We delve into the possibilities offered by the state-of-the-art of nanoparticle physics projected in the space environment and discuss the numerous challenges, and the corresponding potential advancements, that the space environment presents. In doing this, we also offer an ab-initio estimate of the potential of space-based interferometry with some of the largest systems ever considered and show that there is room for tests of quantum mechanics at an unprecedented level of detail.
Quantum technologies in space Rainer Kaltenbaek, Antonio Acin, Laszlo Bacsardi, Paolo Bianco, Philippe Bouyer, Eleni Diamanti, Christoph Marquardt, Yasser Omar, Valerio Pruneri, Ernst Rasel, Bernhard Sang, Stephan Seidel, Hendrik Ulbricht, Rupert Ursin, Paolo Villoresi, Mathias van den Bossche, Wolf von Klitzing, Hugo Zbinden, Mauro Paternostro, Angelo Bassi Experimental Astronomy, 2021 Recently, the European Commission supported by many European countries has announced large investments towards the commercialization of quantum technology (QT) to address and mitigate some of the biggest challenges facing today’s digital era – e.g. secure communication and computing power. For more than two decades the QT community has been working on the development of QTs, which promise landmark breakthroughs leading to commercialization in various areas. The ambitious goals of the QT community and expectations of EU authorities cannot be met solely by individual initiatives of single countries, and therefore, require a combined European effort of large and unprecedented dimensions comparable only to the Galileo or Copernicus programs. Strong international competition calls for a coordinated European effort towards the development of QT in and for space, including research and development of technology in the areas of communication and sensing. Here, we aim at summarizing the state of the art in the development of quantum technologies which have an impact in the field of space applications. Our goal is to outline a complete framework for the design, development, implementation, and exploitation of quantum technology in space.
Single-shot Stern-Gerlach magnetic gradiometer with an expanding cloud of cold cesium atoms Katja Gosar, Tina Arh, Tadej Mežnaršič, Ivan Kvasič, Dušan Ponikvar, Tomaž Apih, Rainer Kaltenbaek, Rok Žitko, Erik Zupanič, Samo Beguš, Peter Jeglič Physical Review A, 2021 We combine the Ramsey interferometry protocol, the Stern-Gerlach detection scheme, and the use of elongated geometry of a cloud of fully polarized cold cesium atoms to measure the selected component of the magnetic-field gradient along the atomic cloud in a single shot. In contrast to the standard method where the precession of two spatially separated atomic clouds is simultaneously measured to extract their phase difference, which is proportional to the magnetic-field gradient, we here demonstrate a gradiometer using a single image of an expanding atomic cloud with the phase difference imprinted along the cloud. Using resonant radio-frequency pulses and Stern-Gerlach imaging, we first demonstrate nutation and Larmor precession of atomic magnetization in an applied magnetic field. Next, we let the cold atom cloud expand in one dimension and apply the protocol for measuring the magnetic-field gradient. The resolution of our single-shot gradiometer is not limited by thermal motion of atoms and has an estimated absolute accuracy below $\\ifmmode\\pm\\else\\textpm\\fi{}0.2$ mG/cm ($\\ifmmode\\pm\\else\\textpm\\fi{}20$ nT/cm).
Tests in space Rainer Kaltenbaek Fundamental Theories of Physics, 2021
Space QUEST mission proposal: Experimentally testing decoherence due to gravity Siddarth Koduru Joshi, Jacques Pienaar, Timothy C Ralph, Luigi Cacciapuoti, Will McCutcheon, John Rarity, Dirk Giggenbach, Jin Gyu Lim, Vadim Makarov, Ivette Fuentes, Thomas Scheidl, Erik Beckert, Mohamed Bourennane, David Edward Bruschi, Adán Cabello, Jose Capmany, Alberto Carrasco-Casado, Eleni Diamanti, Miloslav Dušek, Dominique Elser, Angelo Gulinatti, Robert H Hadfield, Thomas Jennewein, Rainer Kaltenbaek, Michael A Krainak, Hoi-Kwong Lo, Christoph Marquardt, Gerard Milburn, Momtchil Peev, Andreas Poppe, Valerio Pruneri, Renato Renner, Christophe Salomon, Johannes Skaar, Nikolaos Solomos, Mario Stipčević, Juan P Torres, Morio Toyoshima, Paolo Villoresi, Ian Walmsley, Gregor Weihs, Harald Weinfurter, Anton Zeilinger, Marek Żukowski, Rupert Ursin, and New Journal of Physics, 2018
Macroscopic quantum resonators (MAQRO): 2015 update Rainer Kaltenbaek, Markus Aspelmeyer, Peter F Barker, Angelo Bassi, James Bateman, Kai Bongs, Sougato Bose, Claus Braxmaier, Časlav Brukner, Bruno Christophe, Michael Chwalla, Pierre-François Cohadon, Adrian Michael Cruise, Catalina Curceanu, Kishan Dholakia, Lajos Diósi, Klaus Döringshoff, Wolfgang Ertmer, Jan Gieseler, Norman Gürlebeck, Gerald Hechenblaikner, Antoine Heidmann, Sven Herrmann, Sabine Hossenfelder, Ulrich Johann, Nikolai Kiesel, Myungshik Kim, Claus Lämmerzahl, Astrid Lambrecht, Michael Mazilu, Gerard J Milburn, Holger Müller, Lukas Novotny, Mauro Paternostro, Achim Peters, Igor Pikovski, André Pilan Zanoni, Ernst M Rasel, Serge Reynaud, Charles Jess Riedel, Manuel Rodrigues, Loïc Rondin, Albert Roura, Wolfgang P Schleich, Jörg Schmiedmayer, Thilo Schuldt, Keith C Schwab, Martin Tajmar, Guglielmo M Tino, Hendrik Ulbricht, Rupert Ursin, Vlatko Vedral EPJ Quantum Technology, 2016
Testing quantum physics in space using high-mass matter-wave interferometry Proceedings of the 50th Rencontres De Moriond 2015 Gravitation 100 Years After Gr, 2015
Cavity cooling of an optically levitated submicron particle Nikolai Kiesel, Florian Blaser, Uroš Delić, David Grass, Rainer Kaltenbaek, Markus Aspelmeyer Proceedings of the National Academy of Sciences of the United States of America, 2013
Macroscopic quantum resonators in space R. Kaltenbaek, G. Hechenblaikner, N. Kiesel, U. Johann, M. Aspelmeyer 2011 Conference on Lasers and Electro Optics Europe and 12th European Quantum Electronics Conference CLEO Europe Eqec 2011, 2011
Chirped-pulse interferometry for dispersion-cancelled OCT Robert Prevedel, Kurt Schreiter, Rainer Kaltenbaek, Jonathan Lavoie, Devon Biggerstaff, Kevin J. Resch 2011 Conference on Lasers and Electro Optics Europe and 12th European Quantum Electronics Conference CLEO Europe Eqec 2011, 2011
Photon triplets and bound entanglement K. J. Resch, H. Hübel, D. R. Hamel, A. Fedrizzi, S. Ramelow, T. Jennewein, J. Lavoie, R. Kaltenbaek, M. Piani 2011 Ico International Conference on Information Photonics Ip 2011, 2011
An experimental test of non-local realism Simon Gröblacher, Tomasz Paterek, Rainer Kaltenbaek, Časlav Brukner, Marek Żukowski, Markus Aspelmeyer, Anton Zeilinger Nature, 2007
Quantum teleportation across the Danube Rupert Ursin, Thomas Jennewein, Markus Aspelmeyer, Rainer Kaltenbaek, Michael Lindenthal, Philip Walther, Anton Zeilinger Nature, 2004
Proof-of-Concept Experiments for Quantum Physics in Space Rainer Kaltenbaek, Markus Aspelmeyer, Thomas Jennewein, Caslav Brukner, Anton Zeilinger, Martin Pfennigbauer, Walter R. Leeb Proceedings of SPIE the International Society for Optical Engineering, 2004
Long-distance free-space distribution of quantum entanglement Markus Aspelmeyer, Hannes R. Böhm, Tsewang Gyatso, Thomas Jennewein, Rainer Kaltenbaek, Michael Lindenthal, Gabriel Molina-Terriza, Andreas Poppe, Kevin Resch, Michael Taraba, Rupert Ursin, Philip Walther, Anton Zeilinger Science, 2003
Designing a compact cavity-enhanced source of entangled photons Ž Pušavec, L Ulčakar, R Kaltenbaek Physical Review A 111 (4), 043707 , 2025 2025
Priložnosti in izzivi kvantnih satelitskih komunikacij. K Radaković, V Eržen, L Ulčakar, A Ramšak, B Batagelj, R Kaltenbaek, ... Electrotechnical Review/Elektrotehniski Vestnik 92 , 2025 2025
Deploying an inter‐European quantum network D Ribezzo, M Zahidy, I Vagniluca, N Biagi, S Francesconi, T Occhipinti, ... Advanced Quantum Technologies 6 (2), 2200061 , 2023 2023 Citations: 123
Research campaign: Macroscopic quantum resonators (MAQRO) R Kaltenbaek, M Arndt, M Aspelmeyer, PF Barker, A Bassi, J Bateman, ... Quantum Science and Technology 8 (1), 014006 , 2023 2023 Citations: 32
Cold atoms in space: community workshop summary and proposed road-map I Alonso, C Alpigiani, B Altschul, H Araújo, G Arduini, J Arlt, L Badurina, ... EPJ Quantum Technology 9 (1), 1-55 , 2022 2022 Citations: 93
Towards a european quantum network D Ribezzo, M Zahidy, I Vagniluca, N Biagi, S Francesconi, T Occhipinti, ... European Conference and Exhibition on Optical Communication, Th1G. 2 , 2022 2022 Citations: 4
MAQRO 2022 proposal for testing quantum physics in space R Kaltenbaek 44th COSPAR Scientific Assembly. Held 16-24 July 44, 3008 , 2022 2022
Quantum physics in space A Belenchia, M Carlesso, Ö Bayraktar, D Dequal, I Derkach, G Gasbarri, ... Physics Reports 951, 1-70 , 2022 2022 Citations: 136
Feasibility considerations for free-fall tests of gravitational decoherence R Kaltenbaek AVS Quantum Science 4 (1) , 2022 2022 Citations: 8
MAQRO--BPS 2023 research campaign whitepaper R Kaltenbaek, M Arndt, M Aspelmeyer, PF Barker, A Bassi, J Bateman, ... arXiv preprint arXiv:2202.01535 , 2022 2022 Citations: 6
Cold atoms in space: community workshop summary and proposed road-map C Alpigiani, B Altschul, G Arduini, J Arlt, L Badurina, S Bandarupally, ... 2022
D. Ribezzo, M. Zahidy, I. Vagniluca, N. Biagi, S. Francesconi, T. Occhipinti, LK Oxenløwe, M. Lončarić, I. Cvitić, M. Stipčević, Ž. Pušavec, R. Kaltenbaek, A. Ramšak, F. Cesa … M Zahidy, I Vagniluca, N Biagi, S Francesconi, T Occhipinti, LK Oxenløwe, ... ECOC, 0-0 , 2022 2022
IEEE: Towards a European quantum network D Ribezzo, M Zahidy, G Giorgetti, Ž Pušavec, I Vagniluca, A Zavatta, ... 2022
Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles G Gasbarri, A Belenchia, M Carlesso, S Donadi, A Bassi, R Kaltenbaek, ... Communications Physics 4 (1), 155 , 2021 2021 Citations: 86
Testing the foundations of quantum physics in space Interferometric and non-interferometric tests with Large Particles G Gasbarri, A Belenchia, M Carlesso, S Donadi, A Bassi, R Kaltenbaek, ... arXiv preprint arXiv:2106.05349 , 2021 2021 Citations: 13
Quantum technologies in space R Kaltenbaek, A Acin, L Bacsardi, P Bianco, P Bouyer, E Diamanti, ... Experimental Astronomy 51 (3), 1677-1694 , 2021 2021 Citations: 101
Single-shot Stern-Gerlach magnetic gradiometer with an expanding cloud of cold cesium atoms K Gosar, T Arh, T Mežnaršič, I Kvasič, D Ponikvar, T Apih, R Kaltenbaek, ... Physical Review A 103 (2), 022611 , 2021 2021 Citations: 6
Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles S Donadi, A Bassi, R Kaltenbaek, M Paternostro, H Ulbricht 2021
Macroscopic tests of quantum physics: critical challenges and recent developments R Kaltenbaek 43rd COSPAR Scientific Assembly. Held 28 January-4 February 43, 2121 , 2021 2021
Tests in space R Kaltenbaek Do Wave Functions Jump? Perspectives of the Work of GianCarlo Ghirardi, 401-411 , 2020 2020 Citations: 6
MOST CITED SCHOLAR PUBLICATIONS
An experimental test of non-local realism S Gröblacher, T Paterek, R Kaltenbaek, Č Brukner, M Żukowski, ... Nature 446 (7138), 871-875 , 2007 2007 Citations: 777
Large quantum superpositions and interference of massive nanometer-sized objects O Romero-Isart, AC Pflanzer, F Blaser, R Kaltenbaek, N Kiesel, ... Physical review letters 107 (2), 020405 , 2011 2011 Citations: 654
High-speed linear optics quantum computing using active feed-forward R Prevedel, P Walther, F Tiefenbacher, P Böhi, R Kaltenbaek, ... Nature 445 (7123), 65-69 , 2007 2007 Citations: 510
Quantum teleportation across the Danube R Ursin, T Jennewein, M Aspelmeyer, R Kaltenbaek, M Lindenthal, ... Nature 430 (7002), 849-849 , 2004 2004 Citations: 507
Cavity cooling of an optically levitated submicron particle N Kiesel, F Blaser, U Delić, D Grass, R Kaltenbaek, M Aspelmeyer Proceedings of the National Academy of Sciences 110 (35), 14180-14185 , 2013 2013 Citations: 425
Long-distance free-space distribution of quantum entanglement M Aspelmeyer, HR Bohm, T Gyatso, T Jennewein, R Kaltenbaek, ... science 301 (5633), 621-623 , 2003 2003 Citations: 310
Experimental interference of independent photons R Kaltenbaek, B Blauensteiner, M Żukowski, M Aspelmeyer, A Zeilinger Physical review letters 96 (24), 240502 , 2006 2006 Citations: 286
Macroscopic quantum resonators (MAQRO) Testing quantum and gravitational physics with massive mechanical resonators R Kaltenbaek, G Hechenblaikner, N Kiesel, O Romero-Isart, KC Schwab, ... Experimental Astronomy 34 (2), 123-164 , 2012 2012 Citations: 161
High-fidelity entanglement swapping with fully independent sources R Kaltenbaek, R Prevedel, M Aspelmeyer, A Zeilinger Physical Review A—Atomic, Molecular, and Optical Physics 79 (4), 040302 , 2009 2009 Citations: 137
Quantum physics in space A Belenchia, M Carlesso, Ö Bayraktar, D Dequal, I Derkach, G Gasbarri, ... Physics Reports 951, 1-70 , 2022 2022 Citations: 136
Macroscopic quantum resonators (MAQRO): 2015 update R Kaltenbaek, M Aspelmeyer, PF Barker, A Bassi, J Bateman, K Bongs, ... EPJ Quantum Technology 3 (1), 5 , 2016 2016 Citations: 129
Deploying an inter‐European quantum network D Ribezzo, M Zahidy, I Vagniluca, N Biagi, S Francesconi, T Occhipinti, ... Advanced Quantum Technologies 6 (2), 2200061 , 2023 2023 Citations: 123
Experimental bound entanglement in a four-photon state J Lavoie, R Kaltenbaek, M Piani, KJ Resch Physical review letters 105 (13), 130501 , 2010 2010 Citations: 115
Quantum technologies in space R Kaltenbaek, A Acin, L Bacsardi, P Bianco, P Bouyer, E Diamanti, ... Experimental Astronomy 51 (3), 1677-1694 , 2021 2021 Citations: 101
Experimental violation of Svetlichny's inequality J Lavoie, R Kaltenbaek, KJ Resch New Journal of Physics 11 (7), 073051 , 2009 2009 Citations: 101
Optical one-way quantum computing with a simulated valence-bond solid R Kaltenbaek, J Lavoie, B Zeng, SD Bartlett, KJ Resch Nature Physics 6 (11), 850-854 , 2010 2010 Citations: 98
Cold atoms in space: community workshop summary and proposed road-map I Alonso, C Alpigiani, B Altschul, H Araújo, G Arduini, J Arlt, L Badurina, ... EPJ Quantum Technology 9 (1), 1-55 , 2022 2022 Citations: 93
Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles G Gasbarri, A Belenchia, M Carlesso, S Donadi, A Bassi, R Kaltenbaek, ... Communications Physics 4 (1), 155 , 2021 2021 Citations: 86
