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  1. Research

    Laser annealing heals radiation damage in avalanche photodiodes

    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...

    Jin Gyu Lim, Elena Anisimova, Brendon L Higgins, Jean-Philippe Bourgoin, Thomas Jennewein and Vadim Makarov

    EPJ Quantum Technology 2017 4:11

    Published on: 7 June 2017

  2. Research

    Mitigating radiation damage of single photon detectors for space applications

    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 ...

    Elena Anisimova, Brendon L Higgins, Jean-Philippe Bourgoin, Miles Cranmer, Eric Choi, Danya Hudson, Louis P Piche, Alan Scott, Vadim Makarov and Thomas Jennewein

    EPJ Quantum Technology 2017 4:10

    Published on: 26 May 2017

  3. Research

    JOKARUS - design of a compact optical iodine frequency reference for a sounding rocket mission

    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...

    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

    EPJ Quantum Technology 2017 4:9

    Published on: 22 May 2017

  4. Research

    A model study of present-day Hall-effect circulators

    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...

    B Placke, S Bosco and DP DiVincenzo

    EPJ Quantum Technology 2017 4:5

    Published on: 17 April 2017

  5. Research

    CubeSat quantum communications mission

    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 ...

    Daniel KL Oi, Alex Ling, Giuseppe Vallone, Paolo Villoresi, Steve Greenland, Emma Kerr, Malcolm Macdonald, Harald Weinfurter, Hans Kuiper, Edoardo Charbon and Rupert Ursin

    EPJ Quantum Technology 2017 4:6

    Published on: 17 April 2017

  6. Research

    Nearly optimal measurement schemes in a noisy Mach-Zehnder interferometer with coherent and squeezed vacuum

    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 ...

    Bryan T Gard, Chenglong You, Devendra K Mishra, Robinjeet Singh, Hwang Lee, Thomas R Corbitt and Jonathan P Dowling

    EPJ Quantum Technology 2017 4:4

    Published on: 7 April 2017

  7. Research

    Spatial non-adiabatic passage using geometric phases

    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...

    Albert Benseny, Anthony Kiely, Yongping Zhang, Thomas Busch and Andreas Ruschhaupt

    EPJ Quantum Technology 2017 4:3

    Published on: 28 March 2017

  8. Research

    A blueprint for a simultaneous test of quantum mechanics and general relativity in a space-based quantum optics experiment

    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...

    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

    EPJ Quantum Technology 2017 4:2

    Published on: 7 February 2017

  9. Research

    Reliability of analog quantum simulation

    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...

    Mohan Sarovar, Jun Zhang and Lishan Zeng

    EPJ Quantum Technology 2017 4:1

    Published on: 3 January 2017

  10. Research

    Geometric control theory for quantum back-action evasion

    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...

    Yu Yokotera and Naoki Yamamoto

    EPJ Quantum Technology 2016 3:15

    Published on: 28 October 2016

  11. Research

    Silicon nanophotonics for scalable quantum coherent feedback networks

    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...

    Mohan Sarovar, Daniel BS Soh, Jonathan Cox, Constantin Brif, Christopher T DeRose, Ryan Camacho and Paul Davids

    EPJ Quantum Technology 2016 3:14

    Published on: 22 October 2016

  12. Commentary

    Nanosatellite experiments to enable future space-based QKD missions

    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 ...

    Robert Bedington, Xueliang Bai, Edward Truong-Cao, Yue Chuan Tan, Kadir Durak, Aitor Villar Zafra, James A Grieve, Daniel KL Oi and Alexander Ling

    EPJ Quantum Technology 2016 3:12

    Published on: 18 October 2016

  13. Research

    Few-qubit quantum-classical simulation of strongly correlated lattice fermions

    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 ...

    Juha M Kreula, Laura García-Álvarez, Lucas Lamata, Stephen R Clark, Enrique Solano and Dieter Jaksch

    EPJ Quantum Technology 2016 3:11

    Published on: 8 August 2016

  14. Research

    Tunable coupling of transmission-line microwave resonators mediated by an rf SQUID

    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...

    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…

    EPJ Quantum Technology 2016 3:10

    Published on: 28 July 2016

  15. Research

    Quantum simulation of the Anderson Hamiltonian with an array of coupled nanoresonators: delocalization and thermalization effects

    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...

    John Lozada-Vera, Alejandro Carrillo, Olimpio P de Sá Neto, Jalil K Moqadam, Matthew D LaHaye and Marcos C de Oliveira

    EPJ Quantum Technology 2016 3:9

    Published on: 8 June 2016

  16. Letter

    Thermal noise in BEC-phononic gravitational wave detectors

    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...

    Carlos Sabín, Jan Kohlrus, David Edward Bruschi and Ivette Fuentes

    EPJ Quantum Technology 2016 3:8

    Published on: 20 May 2016

  17. Research

    Quantum interferences reconstruction with low homodyne detection efficiency

    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...

    Martina Esposito, Francesco Randi, Kelvin Titimbo, Georgios Kourousias, Alessio Curri, Roberto Floreanini, Fulvio Parmigiani, Daniele Fausti, Klaus Zimmermann and Fabio Benatti

    EPJ Quantum Technology 2016 3:7

    Published on: 4 May 2016

  18. Review

    Macroscopic Quantum Resonators (MAQRO): 2015 update

    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...

    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…

    EPJ Quantum Technology 2016 3:5

    Published on: 24 March 2016

  19. Research

    Methodology for bus layout for topological quantum error correcting codes

    Most quantum computing architectures can be realized as two-dimensional lattices of qubits that interact with each other. We take transmon qubits and transmission line resonators as promising candidates for qu...

    Martin Wosnitzka, Fabio L Pedrocchi and David P DiVincenzo

    EPJ Quantum Technology 2016 3:4

    Published on: 9 March 2016

  20. Research

    Trapped modes in linear quantum stochastic networks with delays

    Networks of open quantum systems with feedback have become an active area of research for applications such as quantum control, quantum communication and coherent information processing. A canonical formalism ...

    Gil Tabak and Hideo Mabuchi

    EPJ Quantum Technology 2016 3:3

    Published on: 3 March 2016

  21. Review

    Quantum metamaterials in the microwave and optical ranges

    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...

    Alexandre M Zagoskin, Didier Felbacq and Emmanuel Rousseau

    EPJ Quantum Technology 2016 3:2

    Published on: 20 February 2016

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