Results 21 to 30 of about 3,578 (70)

Quantum error correction for continuously detected errors with any number of error channels per qubit [PDF]

open access: yes, 2004
It was shown by Ahn, Wiseman, and Milburn [PRA {\bf 67}, 052310 (2003)] that feedback control could be used as a quantum error correction process for errors induced by weak continuous measurement, given one perfectly measured error channel per qubit ...
Ahn, Charlene   +2 more
core   +2 more sources

Universally optimal noisy quantum walks on complex networks

open access: yesNew Journal of Physics, 2014
Transport properties play a crucial role in several fields of science, for example biology, chemistry, sociology, information science and physics. The behavior of many dynamical processes running over complex networks is known to be closely related to ...
Filippo Caruso
doaj   +1 more source

Erratum: Dynamics of the Bounds of Squared Concurrence [Phys. Rev. A 79, 032306 (2009)]

open access: yes, 2011
This is an erratum to our paper.Comment: a little different from the published ...
Fan, Heng, Liu, Zhao
core   +1 more source

Deterministic quantum state transfer from an electronic charge qubit to a photonic polarization qubit [PDF]

open access: yes, 2006
Building on an earlier proposal for the production of polarization-entangled microwaves by means of intraband transitions in a pair of quantum dots, we show how this device can be used to transfer an unknown single-qubit state from electronic charge to ...
Ament, L. J. P., Beenakker, C. W. J.
core   +4 more sources

Symmetry reduction for tunneling defects due to strong couplings to phonons

open access: yesNew Journal of Physics, 2017
Tunneling two-level systems (TLSs) are ubiquitous in amorphous solids, and form a major source of noise in systems such as nano-mechanical oscillators, single electron transistors, and superconducting qubits.
P Nalbach, M Schechter
doaj   +1 more source

Rapid steady-state convergence for quantum systems using time-delayed feedback control

open access: yesNew Journal of Physics, 2014
We propose a time-delayed feedback control scheme for open quantum systems that can dramatically reduce the time to reach steady state. No measurement is performed in the feedback loop, and we suggest a simple all-optical implementation for a cavity QED ...
A L Grimsmo, A S Parkins, B-S Skagerstam
doaj   +1 more source

Comment on "Universal Decoherence in Solids"

open access: yes, 2004
We discuss the formula for the decoherence rate proposed by Eugene M. Chudnovsky [Phys. Rev. Lett. 92, 120405 (2004)]. We show that it has a limited range of validity and is not applicable to evaluation of the width of a low-energy optical mode ...
L. A. Openov, L. D. Landau
core   +1 more source

Manipulating quantum coherence of charge states in interacting double-dot Aharonov–Bohm interferometers

open access: yesNew Journal of Physics, 2018
We investigate the dynamics of charge-state coherence in a degenerate double-dot Aharonov–Bohm interferometer with finite inter-dot Coulomb interactions.
Jinshuang Jin   +4 more
doaj   +1 more source

Generalized Kraus operators for the one-qubit depolarizing quantum channel

open access: yes, 2017
Microscopic Hamiltonian models of the composite system "open system + environment" typically do not provide the operator-sum Kraus form of the open system's dynamical map.
Arsenijevic, Momir   +2 more
core   +1 more source

On the von Neumann entropy of a bath linearly coupled to a driven quantum system

open access: yesNew Journal of Physics, 2015
The change of the von Neumann entropy of a set of harmonic oscillators initially in thermal equilibrium and interacting linearly with an externally driven quantum system is computed by adapting the Feynman–Vernon influence functional formalism.
Erik Aurell, Ralf Eichhorn
doaj   +1 more source

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