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  1. Quantum computers (QC), if realized, could disrupt many computationally intense fields of science. The building block element of a QC is a quantum bit (qubit). Qubits enable the use of quantum superposition an...

    Authors: S. V. Kutsaev, K. Taletski, R. Agustsson, P. Carriere, A. N. Cleland, Z. A. Conway, É. Dumur, A. Moro and A. Yu. Smirnov
    Citation: EPJ Quantum Technology 2020 7:7
  2. We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive range...

    Authors: Yousef Abou El-Neaj, Cristiano Alpigiani, Sana Amairi-Pyka, Henrique Araújo, Antun Balaž, Angelo Bassi, Lars Bathe-Peters, Baptiste Battelier, Aleksandar Belić, Elliot Bentine, José Bernabeu, Andrea Bertoldi, Robert Bingham, Diego Blas, Vasiliki Bolpasi, Kai Bongs…
    Citation: EPJ Quantum Technology 2020 7:6
  3. There are several networks of precision quantum sensors in existence, including networks of atomic clocks, magnetometers, and gravitational wave detectors. These networks can be re-purposed for searches of exo...

    Authors: Guglielmo Panelli, Benjamin M. Roberts and Andrei Derevianko
    Citation: EPJ Quantum Technology 2020 7:5
  4. Satellite-based platforms are currently the only feasible way of achieving intercontinental range for quantum communication, enabling thus the future global quantum internet. Recent demonstrations by the Chine...

    Authors: Mateusz Polnik, Luca Mazzarella, Marilena Di Carlo, Daniel KL Oi, Annalisa Riccardi and Ashwin Arulselvan
    Citation: EPJ Quantum Technology 2020 7:3
  5. We consider the interaction of a magnetically trapped Bose–Einstein condensate of Rubidium atoms with the stationary microwave radiation field sustained by a coplanar waveguide resonator. This coupling allows ...

    Authors: Orsolya Kálmán and Peter Domokos
    Citation: EPJ Quantum Technology 2020 7:2
  6. We study the quantum phase transition in the Dicke model beyond the thermodynamic limit. With the Kibble–Zurek mechanism and adiabatic dynamics, we find that the residual energy is inversely proportional to th...

    Authors: Lituo Shen, Zhicheng Shi, Zhenbiao Yang, Huaizhi Wu, Zhirong Zhong and Shibiao Zheng
    Citation: EPJ Quantum Technology 2020 7:1
  7. In-field demonstrations in real-world scenarios boost the development of a rising technology towards its integration in existing infrastructures. Although quantum key distribution (QKD) devices are already ado...

    Authors: Davide Bacco, Ilaria Vagniluca, Beatrice Da Lio, Nicola Biagi, Adriano Della Frera, Davide Calonico, Costanza Toninelli, Francesco S. Cataliotti, Marco Bellini, Leif K. Oxenløwe and Alessandro Zavatta
    Citation: EPJ Quantum Technology 2019 6:5
  8. A robust cryogenic infrastructure in form of a wired, thermally optimized dilution refrigerator is essential for solid-state based quantum processors. Here, we engineer a cryogenic setup, which minimizes passi...

    Authors: S. Krinner, S. Storz, P. Kurpiers, P. Magnard, J. Heinsoo, R. Keller, J. Lütolf, C. Eichler and A. Wallraff
    Citation: EPJ Quantum Technology 2019 6:2
  9. We present a ground-to-space quantum key distribution (QKD) mission concept and the accompanying feasibility study for the development of the associated low earth orbit nanosatellite payload. The quantum infor...

    Authors: Erik Kerstel, Arnaud Gardelein, Mathieu Barthelemy, Matthias Fink, Siddarth Koduru Joshi and Rupert Ursin
    Citation: EPJ Quantum Technology 2018 5:6
  10. We show how to implement a Rindler transformation of coordinates with an embedded quantum simulator. A suitable mapping allows to realise the unphysical operation in the simulated dynamics by implementing a qu...

    Authors: Carlos Sabín
    Citation: EPJ Quantum Technology 2018 5:5
  11. Satellites are the most efficient way to achieve global scale quantum communication (Q.Com) because unavoidable losses restrict fiber based Q.Com to a few hundred kilometers. We demonstrate the feasibility of ...

    Authors: Sebastian Philipp Neumann, Siddarth Koduru Joshi, Matthias Fink, Thomas Scheidl, Roland Blach, Carsten Scharlemann, Sameh Abouagaga, Daanish Bambery, Erik Kerstel, Mathieu Barthelemy and Rupert Ursin
    Citation: EPJ Quantum Technology 2018 5:4
  12. Since the publication of the original article [Placke et al. in EPJ Quantum Technol 4:5, 2017], one of the authors noticed a typographical error to equations (11a) and (11b) in their published article [Placke et ...

    Authors: B. Placke, S. Bosco and D. P. DiVincenzo
    Citation: EPJ Quantum Technology 2018 5:3

    The original article was published in EPJ Quantum Technology 2017 4:5

  13. We address the performance of a coin-biased quantum walk as a generator for non-classical position states of the walker. We exploit a phenomenon of coherent localization in the position space - resulting from the...

    Authors: Helena Majury, Joelle Boutari, Elizabeth O’Sullivan, Alessandro Ferraro and Mauro Paternostro
    Citation: EPJ Quantum Technology 2018 5:1
  14. Avalanche photodiodes (APDs) are a practical option for space-based quantum communications requiring single-photon detection. However, radiation damage to APDs significantly increases their dark count rates an...

    Authors: Jin Gyu Lim, Elena Anisimova, Brendon L Higgins, Jean-Philippe Bourgoin, Thomas Jennewein and Vadim Makarov
    Citation: EPJ Quantum Technology 2017 4:11
  15. Single-photon detectors in space must retain useful performance characteristics despite being bombarded with sub-atomic particles. Mitigating the effects of this space radiation is vital to enabling new space ...

    Authors: Elena Anisimova, Brendon L Higgins, Jean-Philippe Bourgoin, Miles Cranmer, Eric Choi, Danya Hudson, Louis P Piche, Alan Scott, Vadim Makarov and Thomas Jennewein
    Citation: EPJ Quantum Technology 2017 4:10
  16. We present the design of a compact absolute optical frequency reference for space applications based on hyperfine transitions in molecular iodine with a targeted fractional frequency instability of better than...

    Authors: Vladimir Schkolnik, Klaus Döringshoff, Franz Balthasar Gutsch, Markus Oswald, Thilo Schuldt, Claus Braxmaier, Matthias Lezius, Ronald Holzwarth, Christian Kürbis, Ahmad Bawamia, Markus Krutzik and Achim Peters
    Citation: EPJ Quantum Technology 2017 4:9
  17. Low-loss waveguides are required for quantum communication at distances beyond the chip-scale for any low-temperature solid-state implementation of quantum information processors. We measure and analyze the at...

    Authors: Philipp Kurpiers, Theodore Walter, Paul Magnard, Yves Salathe and Andreas Wallraff
    Citation: EPJ Quantum Technology 2017 4:8
  18. Quantum communication is a prime space technology application and offers near-term possibilities for long-distance quantum key distribution (QKD) and experimental tests of quantum entanglement. However, there ...

    Authors: Daniel KL Oi, Alex Ling, Giuseppe Vallone, Paolo Villoresi, Steve Greenland, Emma Kerr, Malcolm Macdonald, Harald Weinfurter, Hans Kuiper, Edoardo Charbon and Rupert Ursin
    Citation: EPJ Quantum Technology 2017 4:6
  19. Stimulated by the recent implementation of a three-port Hall-effect microwave circulator of Mahoney et al. (MEA), we present model studies of the performance of this device. Our calculations are based on the capa...

    Authors: B Placke, S Bosco and DP DiVincenzo
    Citation: EPJ Quantum Technology 2017 4:5

    The Correction to this article has been published in EPJ Quantum Technology 2018 5:3

  20. The use of an interferometer to perform an ultra-precise parameter estimation under noisy conditions is a challenging task. Here we discuss nearly optimal measurement schemes for a well known, sensitive input ...

    Authors: Bryan T Gard, Chenglong You, Devendra K Mishra, Robinjeet Singh, Hwang Lee, Thomas R Corbitt and Jonathan P Dowling
    Citation: EPJ Quantum Technology 2017 4:4
  21. Quantum technologies based on adiabatic techniques can be highly effective, but often at the cost of being very slow. Here we introduce a set of experimentally realistic, non-adiabatic protocols for spatial st...

    Authors: Albert Benseny, Anthony Kiely, Yongping Zhang, Thomas Busch and Andreas Ruschhaupt
    Citation: EPJ Quantum Technology 2017 4:3
  22. In this paper we propose an experiment designed to observe a general-relativistic effect on single photon interference. The experiment consists of a folded Mach-Zehnder interferometer, with the arms distribute...

    Authors: Sam Pallister, Simon Coop, Valerio Formichella, Nicolas Gampierakis, Virginia Notaro, Paul Knott, Rui Azevedo, Nikolaus Buchheim, Silvio de Carvalho, Emilia Järvelä, Matthieu Laporte, Jukka-Pekka Kaikkonen, Neda Meshksar, Timo Nikkanen and Madeleine Yttergren
    Citation: EPJ Quantum Technology 2017 4:2
  23. Analog quantum simulators (AQS) will likely be the first nontrivial application of quantum technology for predictive simulation. However, there remain questions regarding the degree of confidence that can be p...

    Authors: Mohan Sarovar, Jun Zhang and Lishan Zeng
    Citation: EPJ Quantum Technology 2017 4:1
  24. Engineering a sensor system for detecting an extremely tiny signal such as the gravitational-wave force is a very important subject in quantum physics. A major obstacle to this goal is that, in a simple detect...

    Authors: Yu Yokotera and Naoki Yamamoto
    Citation: EPJ Quantum Technology 2016 3:15
  25. The emergence of coherent quantum feedback control (CQFC) as a new paradigm for precise manipulation of dynamics of complex quantum systems has led to the development of efficient theoretical modeling and simu...

    Authors: Mohan Sarovar, Daniel BS Soh, Jonathan Cox, Constantin Brif, Christopher T DeRose, Ryan Camacho and Paul Davids
    Citation: EPJ Quantum Technology 2016 3:14
  26. We present a programme for establishing the space worthiness of highly-miniaturised, polarisation-entangled, photon pair sources using CubeSat nanosatellites. Once demonstrated, the photon pair sources can be ...

    Authors: Robert Bedington, Xueliang Bai, Edward Truong-Cao, Yue Chuan Tan, Kadir Durak, Aitor Villar Zafra, James A Grieve, Daniel KL Oi and Alexander Ling
    Citation: EPJ Quantum Technology 2016 3:12
  27. We study a proof-of-principle example of the recently proposed hybrid quantum-classical simulation of strongly correlated fermion models in the thermodynamic limit. In a ‘two-site’ dynamical mean-field theory ...

    Authors: Juha M Kreula, Laura García-Álvarez, Lucas Lamata, Stephen R Clark, Enrique Solano and Dieter Jaksch
    Citation: EPJ Quantum Technology 2016 3:11
  28. We realize tunable coupling between two superconducting transmission line resonators. The coupling is mediated by a non-hysteretic rf SQUID acting as a flux-tunable mutual inductance between the resonators. We...

    Authors: Friedrich Wulschner, Jan Goetz, Fabian R Koessel, Elisabeth Hoffmann, Alexander Baust, Peter Eder, Michael Fischer, Max Haeberlein, Manuel J Schwarz, Matthias Pernpeintner, Edwar Xie, Ling Zhong, Christoph W Zollitsch, Borja Peropadre, Juan-Jose Garcia Ripoll, Enrique Solano…
    Citation: EPJ Quantum Technology 2016 3:10
  29. The possibility of using nanoelectromechanical systems as a simulation tool for quantum many-body effects is explored. It is demonstrated that an array of electrostatically coupled nanoresonators can effective...

    Authors: John Lozada-Vera, Alejandro Carrillo, Olimpio P de Sá Neto, Jalil K Moqadam, Matthew D LaHaye and Marcos C de Oliveira
    Citation: EPJ Quantum Technology 2016 3:9
  30. Quasiparticles in a Bose-Einstein condensate are sensitive to space-time distortions. Gravitational waves can induce transformations on the state of phonons that can be observed through quantum state discrimin...

    Authors: Carlos Sabín, Jan Kohlrus, David Edward Bruschi and Ivette Fuentes
    Citation: EPJ Quantum Technology 2016 3:8
  31. Optical homodyne tomography consists in reconstructing the quantum state of an optical field from repeated measurements of its amplitude at different field phases (homodyne data). The experimental noise, which...

    Authors: Martina Esposito, Francesco Randi, Kelvin Titimbo, Georgios Kourousias, Alessio Curri, Roberto Floreanini, Fulvio Parmigiani, Daniele Fausti, Klaus Zimmermann and Fabio Benatti
    Citation: EPJ Quantum Technology 2016 3:7
  32. Do the laws of quantum physics still hold for macroscopic objects - this is at the heart of Schrödinger’s cat paradox - or do gravitation or yet unknown effects set a limit for massive particles? What is the f...

    Authors: 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…
    Citation: EPJ Quantum Technology 2016 3:5
  33. Quantum metamaterials generalize the concept of metamaterials (artificial optical media) to the case when their optical properties are determined by the interplay of quantum effects in the constituent ‘artific...

    Authors: Alexandre M Zagoskin, Didier Felbacq and Emmanuel Rousseau
    Citation: EPJ Quantum Technology 2016 3:2
  34. Propagating quantum microwaves have been proposed and successfully implemented to generate entanglement, thereby establishing a promising platform for the realisation of a quantum communication channel. Howeve...

    Authors: R Di Candia, KG Fedorov, L Zhong, S Felicetti, EP Menzel, M Sanz, F Deppe, A Marx, R Gross and E Solano
    Citation: EPJ Quantum Technology 2015 2:25
  35. Quantum control could be implemented by varying the system Hamiltonian. According to adiabatic theorem, a slowly changing Hamiltonian can approximately keep the system at the ground state during the evolution ...

    Authors: Yu Pan, Zibo Miao, Nina H Amini, Valery Ugrinovskii and Matthew R James
    Citation: EPJ Quantum Technology 2015 2:24
  36. We present an experimental system to study the Bose polaron by immersion of single, well-controllable neutral Cs impurities into a Rb Bose-Einstein condensate (BEC). We show that, by proper optical traps, inde...

    Authors: Michael Hohmann, Farina Kindermann, Benjamin Gänger, Tobias Lausch, Daniel Mayer, Felix Schmidt and Artur Widera
    Citation: EPJ Quantum Technology 2015 2:23
  37. We present an experimental study of the longitudinal electron-spin relaxation of ensembles of negatively charged nitrogen-vacancy (NV) centers in diamond. The measurements were performed with samples having diff...

    Authors: Mariusz Mrózek, Daniel Rudnicki, Pauli Kehayias, Andrey Jarmola, Dmitry Budker and Wojciech Gawlik
    Citation: EPJ Quantum Technology 2015 2:22
  38. Optimal control theory is a powerful tool for solving control problems in quantum mechanics, ranging from the control of chemical reactions to the implementation of gates in a quantum computer. Gradient-based ...

    Authors: Michael H Goerz, K Birgitta Whaley and Christiane P Koch
    Citation: EPJ Quantum Technology 2015 2:21
  39. The detection of single molecules has facilitated many advances in life- and material-science. Commonly the fluorescence of dye molecules is detected, which are attached to a non-fluorescent structure under st...

    Authors: Denis Uhland, Torsten Rendler, Matthias Widmann, Sang-Yun Lee, Jörg Wrachtrup and Ilja Gerhardt
    Citation: EPJ Quantum Technology 2015 2:20

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