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EPJ Quantum Technology
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  2. 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:

  3. 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

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

  4. 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

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  5. 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

    Content type: Research

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  6. 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

    Content type: Research

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  7. 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

    Content type: Research

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  8. 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

    Content type: Research

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  9. 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

    Content type: Research

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  11. 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

    Content type: Commentary

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  12. 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

    Content type: Research

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  13. 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

    Content type: Research

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  14. 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

    Content type: Research

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  15. 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

    Content type: Letter

    Published on:

  16. 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

    Content type: Research

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  18. 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

    Content type: Review

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  21. 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

    Content type: Review

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  23. 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

    Content type: Research

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  24. 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

    Content type: Research

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  25. 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

    Content type: Research

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  26. 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

    Content type: Research

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  27. 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

    Content type: Research

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  28. 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

    Content type: Research

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  29. 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...

    Authors: 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

    Citation: EPJ Quantum Technology 2015 2:19

    Content type: Research

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  31. We develop a quantum learning scheme for binary discrimination of coherent states of light. This is a problem of technological relevance for the reading of information stored in a digital memory. In our settin...

    Authors: Gael Sentís, Mădălin Guţă and Gerardo Adesso

    Citation: EPJ Quantum Technology 2015 2:17

    Content type: Research

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  32. We address quantitatively the relationship between the nonlinearity of a mechanical resonator and the nonclassicality of its ground state. In particular, we analyze the nonclassical properties of the nonlinear...

    Authors: Berihu Teklu, Alessandro Ferraro, Mauro Paternostro and Matteo G A Paris

    Citation: EPJ Quantum Technology 2015 2:16

    Content type: Research

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  34. The purpose of this paper is to study the problem of generalizing the Belavkin-Kalman filter to the case where the classical measurement signal is replaced by a fully quantum non-commutative output signal. We ...

    Authors: Nina H Amini, Zibo Miao, Yu Pan, Matthew R James and Hideo Mabuchi

    Citation: EPJ Quantum Technology 2015 2:14

    Content type: Research

    Published on:

  35. Quantum parameter estimation, the ability to precisely obtain a classical value in a quantum system, is very important to many key quantum technologies. Many of these technologies rely on an optical probe, eit...

    Authors: Trevor A Wheatley, Mankei Tsang, Ian R Petersen and Elanor H Huntington

    Citation: EPJ Quantum Technology 2015 2:13

    Content type: Research

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  36. Numerical methods for the 1-D Dirac equation based on operator splitting and on the quantum lattice Boltzmann (QLB) schemes are reviewed. It is shown that these discretizations fall within the class of quantum...

    Authors: Sauro Succi, François Fillion-Gourdeau and Silvia Palpacelli

    Citation: EPJ Quantum Technology 2015 2:12

    Content type: Research

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  37. We study a novel class of open-loop control protocols constructed to perform arbitrary nontrivial single-qubit logic operations robust against time-dependent non-Markovian noise. Amplitude and phase modulation...

    Authors: Harrison Ball and Michael J Biercuk

    Citation: EPJ Quantum Technology 2015 2:11

    Content type: Research

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  38. We present nonlinear photonic circuit models for constructing programmable linear transformations and use these to realize a coherent perceptron, i.e., an all-optical linear classifier capable of learning the ...

    Authors: Nikolas Tezak and Hideo Mabuchi

    Citation: EPJ Quantum Technology 2015 2:10

    Content type: Research

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  39. Using the Trotter-Kato theorem we prove the convergence of the unitary dynamics generated by an increasingly singular Hamiltonian in the case of a single field coupling. The limit dynamics is a quantum stochas...

    Authors: Luc Bouten, Rolf Gohm, John Gough and Hendra Nurdin

    Citation: EPJ Quantum Technology 2015 2:9

    Content type: Research

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  40. We propose a method for the efficient quantum simulation of fermionic systems with superconducting circuits. It consists in the suitable use of Jordan-Wigner mapping, Trotter decomposition, and multiqubit gate...

    Authors: Urtzi Las Heras, Laura García-Álvarez, Antonio Mezzacapo, Enrique Solano and Lucas Lamata

    Citation: EPJ Quantum Technology 2015 2:8

    Content type: Research

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  41. We discuss the noise occurring during a classical dissipative switching process as it would be detected by a quantum bit used as a detector for noise. In particular we study the switching-induced decoherence duri...

    Authors: Ioana Serban and Frank K Wilhelm

    Citation: EPJ Quantum Technology 2015 2:7

    Content type: Research

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  46. We develop the theory to describe the equilibrium ion positions and phonon modes for a trapped ion quantum simulator in an oblate Paul trap that creates two-dimensional Coulomb crystals in a triangular lattice...

    Authors: Bryce Yoshimura, Marybeth Stork, Danilo Dadic, Wesley C Campbell and James K Freericks

    Citation: EPJ Quantum Technology 2015 2:2

    Content type: Research

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  47. We study the out-of-equilibrium dynamics of bosonic atoms in a 1D optical lattice, after the ground-state is excited by a single spontaneous emission event, i.e. after an absorption and re-emission of a lattic...

    Authors: Johannes Schachenmayer, Lode Pollet, Matthias Troyer and Andrew J Daley

    Citation: EPJ Quantum Technology 2015 2:1

    Content type: Research

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  48. The key dynamic properties of fermionic systems, like controllability, reachability, and simulability, are investigated in a general Lie-theoretical frame for quantum systems theory. It just requires knowing d...

    Authors: Zoltán Zimborás, Robert Zeier, Michael Keyl and Thomas Schulte-Herbrüggen

    Citation: EPJ Quantum Technology 2014 1:11

    Content type: Research

    Published on:

  49. Schemes of universal quantum computation in which the interactions between the computational elements, in a computational register, are mediated by some ancillary system are of interest due to their relevance ...

    Authors: Timothy J Proctor and Viv Kendon

    Citation: EPJ Quantum Technology 2014 1:13

    Content type: Research

    Published on:

  50. We study a quantum quench in the Bose-Hubbard model where the tunneling rate J is suddenly switched from zero to a finite value in the Mott regime. In order to solve the many-body quantum dynamics far from equili...

    Authors: Konstantin V Krutitsky, Patrick Navez, Friedemann Queisser and Ralf Schützhold

    Citation: EPJ Quantum Technology 2014 1:12

    Content type: Research

    Published on:

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  • ISSN: 2196-0763 (electronic)