Research
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...
EPJ Quantum Technology 2017 4:11
Published on: 7 June 2017
Research
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 ...
EPJ Quantum Technology 2017 4:10
Published on: 26 May 2017
Research
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...
EPJ Quantum Technology 2017 4:9
Published on: 22 May 2017
Research
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...
EPJ Quantum Technology 2017 4:8
Published on: 4 May 2017
Research
We study how quantum systems that propagate in the spacetime of a rotating planet are affected by the curved background. Spacetime curvature affects wavepackets of photons propagating from Earth to a satellite...
EPJ Quantum Technology 2017 4:7
Published on: 20 April 2017
Research
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 ...
EPJ Quantum Technology 2017 4:6
Published on: 17 April 2017
Research
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...
EPJ Quantum Technology 2017 4:5
Published on: 17 April 2017
Research
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 ...
EPJ Quantum Technology 2017 4:4
Published on: 7 April 2017
Research
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...
EPJ Quantum Technology 2017 4:3
Published on: 28 March 2017
Research
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...
EPJ Quantum Technology 2017 4:2
Published on: 7 February 2017
Research
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...
EPJ Quantum Technology 2017 4:1
Published on: 3 January 2017
Research
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...
EPJ Quantum Technology 2016 3:15
Published on: 28 October 2016
Research
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...
EPJ Quantum Technology 2016 3:14
Published on: 22 October 2016
Commentary
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 ...
EPJ Quantum Technology 2016 3:12
Published on: 18 October 2016
Research
Three-dimensional (3D) microwave cavities have been extensively used for coupling and interacting with superconducting quantum bits (qubits), providing a versatile platform for quantum control experiments and ...
EPJ Quantum Technology 2016 3:13
Published on: 18 October 2016
Research
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 ...
EPJ Quantum Technology 2016 3:11
Published on: 8 August 2016
Research
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...
EPJ Quantum Technology 2016 3:10
Published on: 28 July 2016
Research
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...
EPJ Quantum Technology 2016 3:9
Published on: 8 June 2016
Letter
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...
EPJ Quantum Technology 2016 3:8
Published on: 20 May 2016
Research
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...
EPJ Quantum Technology 2016 3:7
Published on: 4 May 2016
Research
We derive a family of stochastic master equations describing homodyne measurement of multi-qubit diagonal observables in circuit quantum electrodynamics. In the regime where qubit decay can be neglected, our a...
EPJ Quantum Technology 2016 3:6
Published on: 4 April 2016
Review
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...
EPJ Quantum Technology 2016 3:5
Published on: 24 March 2016
Research
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...
EPJ Quantum Technology 2016 3:4
Published on: 9 March 2016
Research
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 ...
EPJ Quantum Technology 2016 3:3
Published on: 3 March 2016
Review
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...
EPJ Quantum Technology 2016 3:2
Published on: 20 February 2016
Published on: 30 May 2017
Published on: 17 May 2017
Published on: 04 April 2016
