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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. Research

    Quantum teleportation of propagating quantum microwaves

    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...

    R Di Candia, KG Fedorov, L Zhong, S Felicetti, EP Menzel, M Sanz, F Deppe, A Marx, R Gross and E Solano

    EPJ Quantum Technology 2015 2:25

    Published on: 15 December 2015

  16. Research

    Neutral impurities in a Bose-Einstein condensate for simulation of the Fröhlich-polaron

    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...

    Michael Hohmann, Farina Kindermann, Benjamin Gänger, Tobias Lausch, Daniel Mayer, Felix Schmidt and Artur Widera

    EPJ Quantum Technology 2015 2:23

    Published on: 14 November 2015

  17. Research

    Longitudinal spin relaxation in nitrogen-vacancy ensembles in diamond

    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...

    Mariusz Mrózek, Daniel Rudnicki, Pauli Kehayias, Andrey Jarmola, Dmitry Budker and Wojciech Gawlik

    EPJ Quantum Technology 2015 2:22

    Published on: 29 October 2015

  18. Research

    Hybrid optimization schemes for quantum control

    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 ...

    Michael H Goerz, K Birgitta Whaley and Christiane P Koch

    EPJ Quantum Technology 2015 2:21

    Published on: 17 September 2015

  19. Research

    Single molecule DNA detection with an atomic vapor notch filter

    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...

    Denis Uhland, Torsten Rendler, Matthias Widmann, Sang-Yun Lee, Jörg Wrachtrup and Ilja Gerhardt

    EPJ Quantum Technology 2015 2:20

    Published on: 26 August 2015

  20. Research

    Gold/diamond nanohybrids for quantum sensing applications

    Recent advances in quantum technology have demonstrated the potential use of negatively charged nitrogen-vacancy (NV) centers in diamond for temperature and magnetic sensing at sub-cellular levels. Fluorescent n...

    Pei-Chang Tsai, Oliver Y Chen, Yan-Kai Tzeng, Yuen Yung Hui, Jiun You Guo, Chih-Che Wu, Ming-Shien Chang and Huan-Cheng Chang

    EPJ Quantum Technology 2015 2:19

    Published on: 22 July 2015

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