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EPJ Quantum Technology
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  2. Quantum phase estimation is a paradigmatic problem in quantum sensing and metrology. Here we show that adaptive methods based on classical machine learning algorithms can be used to enhance the precision of qu...

    Authors: Nelson Filipe Costa, Yasser Omar, Aidar Sultanov and Gheorghe Sorin Paraoanu

    Citation: EPJ Quantum Technology 2021 8:16

    Content type: Research

    Published on:

    The Correction to this article has been published in EPJ Quantum Technology 2021 8:17

  3. We present a miniaturized quantum key distribution system, designed to augment the more mature quantum key distribution systems currently commercially available. Our device is designed for the consumer market,...

    Authors: David Lowndes, Stefan Frick, Andy Hart and John Rarity

    Citation: EPJ Quantum Technology 2021 8:15

    Content type: Letter

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  4. Quantum computing technologies pose a significant threat to the currently employed public-key cryptography protocols. In this paper, we discuss the impact of the quantum threat on public key infrastructures (P...

    Authors: Sergey E. Yunakovsky, Maxim Kot, Nikolay Pozhar, Denis Nabokov, Mikhail Kudinov, Anton Guglya, Evgeniy O. Kiktenko, Ekaterina Kolycheva, Alexander Borisov and Aleksey K. Fedorov

    Citation: EPJ Quantum Technology 2021 8:14

    Content type: Review

    Published on:

  5. Avalanche photodiodes (APDs) are well-suited for single-photon detection on quantum communication satellites as they are a mature technology with high detection efficiency without requiring cryogenic cooling. ...

    Authors: Ian DSouza, Jean-Philippe Bourgoin, Brendon L. Higgins, Jin Gyu Lim, Ramy Tannous, Sascha Agne, Brian Moffat, Vadim Makarov and Thomas Jennewein

    Citation: EPJ Quantum Technology 2021 8:13

    Content type: Research

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  6. In order to qualify quantum algorithms for industrial NP-Hard problems, comparing them to available polynomial approximate classical algorithms and not only to exact exponential ones is necessary. This is a gr...

    Authors: Constantin Dalyac, Loïc Henriet, Emmanuel Jeandel, Wolfgang Lechner, Simon Perdrix, Marc Porcheron and Margarita Veshchezerova

    Citation: EPJ Quantum Technology 2021 8:12

    Content type: Research

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  7. Trapped atomic ensembles are convenient systems for quantum information storage in the long-lived sublevels of the electronic ground state and its conversion to propagating optical photons via stimulated Raman...

    Authors: Árpád Kurkó, Peter Domokos, András Vukics, Thomas Bækkegaard, Nikolaj Thomas Zinner, József Fortágh and David Petrosyan

    Citation: EPJ Quantum Technology 2021 8:11

    Content type: Research

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  11. We explore the optical response of a multimode optomechanical system with quadratic coupling to a weak probe field, where the cavity is driven by a strong control field and the two movable membranes are, respe...

    Authors: Yongchao Zhang, Zhipeng Zhu, Yuanshun Cui, Hualing Yu, Cheng Jiang and Xiufeng Cao

    Citation: EPJ Quantum Technology 2021 8:7

    Content type: Research

    Published on:

  13. Quantum computing holds the potential to deliver great economic prosperity to the European Union (EU). However, the creation of successful business in the field is challenging owing to the required extensive i...

    Authors: Markku Räsänen, Henrikki Mäkynen, Mikko Möttönen and Jan Goetz

    Citation: EPJ Quantum Technology 2021 8:5

    Content type: Commentary

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  14. Silicon photomultipliers are photon-number-resolving detectors endowed with hundreds of cells enabling them to reveal high-populated quantum optical states. In this paper, we address such a goal by showing the...

    Authors: Silvia Cassina, Alessia Allevi, Valerio Mascagna, Michela Prest, Erik Vallazza and Maria Bondani

    Citation: EPJ Quantum Technology 2021 8:4

    Content type: Research

    Published on:

  16. Despite the scientific and engineering challenges facing the development of quantum computers, considerable progress is being made toward applying the technology to commercial applications. In this article, we...

    Authors: Francesco Bova, Avi Goldfarb and Roger G. Melko

    Citation: EPJ Quantum Technology 2021 8:2

    Content type: Commentary

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  17. Microgravity eases several constraints limiting experiments with ultracold and condensed atoms on ground. It enables extended times of flight without suspension and eliminates the gravitational sag for trapped...

    Authors: Kai Frye, Sven Abend, Wolfgang Bartosch, Ahmad Bawamia, Dennis Becker, Holger Blume, Claus Braxmaier, Sheng-Wey Chiow, Maxim A. Efremov, Wolfgang Ertmer, Peter Fierlinger, Tobias Franz, Naceur Gaaloul, Jens Grosse, Christoph Grzeschik, Ortwin Hellmig…

    Citation: EPJ Quantum Technology 2021 8:1

    Content type: Research

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  18. The challenges faced in a comparison of measuring the detection efficiency of free-running InGaAs/InP single-photon avalanche detectors (InGaAs/InP SPAD) were studied by four European National Metrology Instit...

    Authors: M. López, A. Meda, G. Porrovecchio, R. A. Starkwood (Kirkwood), M. Genovese, G. Brida, M. Šmid, C. J. Chunnilall, I. P. Degiovanni and S. Kück

    Citation: EPJ Quantum Technology 2020 7:14

    Content type: Research

    Published on:

  20. Spatial quantitative information about magnetic nanoparticle (MNP) distributions is a prerequisite for biomedical applications like magnetic hyperthermia and magnetic drug targeting. This information can be ga...

    Authors: Aaron Jaufenthaler, Volkmar Schultze, Theo Scholtes, Christian B. Schmidt, Michael Handler, Ronny Stolz and Daniel Baumgarten

    Citation: EPJ Quantum Technology 2020 7:12

    Content type: Research

    Published on:

  21. An array of 21 first-order gradiometers based on zero-field optically-pumped magnetometers is demonstrated for use in magnetoencephalography. Sensors are oriented radially with respect to the head and housed i...

    Authors: N. V. Nardelli, A. R. Perry, S. P. Krzyzewski and S. A. Knappe

    Citation: EPJ Quantum Technology 2020 7:11

    Content type: Research

    Published on:

  22. The Hanbury Brown and Twiss (HBT) interferometer was proposed to observe intensity correlations of starlight to measure a star’s angular diameter. As the intensity of light that reaches the detector from a sta...

    Authors: Xiaoping Ma, Chenglong You, Sushovit Adhikari, Yongjian Gu, Omar S. Magaña-Loaiza, Jonathan P. Dowling and Hwang Lee

    Citation: EPJ Quantum Technology 2020 7:10

    Content type: Research

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  25. 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

    Content type: Research

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  26. 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

    Content type: Review

    Published on:

  27. 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

    Content type: Research

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  28. 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

    Content type: Research

    Published on:

  29. 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

    Content type: Research

    Published on:

  30. 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

    Content type: Research

    Published on:

  32. 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

    Content type: Research

    Published on:

  35. 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

    Content type: Research

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  37. 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

    Content type: Research

    Published on:

  38. 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

    Content type: Research

    Published on:

  39. 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

    Content type: Research

    Published on:

  40. 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

    Content type: Correction

    Published on:

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

  42. 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

    Content type: Research

    Published on:

  43. 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

    Content type: Research

    Published on:

  44. 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

    Content type: Research

    Published on:

  45. 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

    Content type: Research

    Published on:

  46. 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

    Content type: Research

    Published on:

  48. 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

    Content type: Research

    Published on:

  49. 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

    Content type: Research

    Published on:

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

  50. 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

    Content type: Research

    Published on:

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  • ISSN: 2196-0763 (electronic)