Why are there only three quantum noises?

2000 ◽  
Vol 118 (3) ◽  
pp. 349-364 ◽  
Author(s):  
Agnès Coquio
Keyword(s):  
Quantum Noises

Estimating the Influence of Quantum Noises on the Quality of Material Identification by the Dual-Energy Method

2018 ◽  
Vol 54 (8) ◽  
pp. 585-600
Author(s):  
V. A. Udod ◽  
S. P. Osipov ◽  
Y. Wang
Keyword(s):  
Energy Method ◽  
Dual Energy ◽  
Material Identification ◽  
Quantum Noises

scholarly journals Brownian Motion and Quantum Mechanics

2019 ◽  
Vol 19 (02) ◽  
pp. 2050017
Author(s):  
Roumen Tsekov
Keyword(s):  
Quantum Mechanics ◽  
Brownian Motion ◽  
Turbulent Velocity ◽  
Simultaneous Action ◽  
Quantum Brownian Motion ◽  
Velocity Fluctuations ◽  
Diffusive Behavior ◽  
Stochastic Sources ◽  
Quantum Noises

A theoretical parallel between the classical Brownian motion and quantum mechanics is explored via two stochastic sources. It is shown that, in contrast to the classical Langevin force, quantum mechanics is driven by turbulent velocity fluctuations with diffusive behavior. In the case of simultaneous action of the thermal and quantum noises, the quantum Brownian motion is described as well.

scholarly journals Quantum Noises, Physical Realizability and Coherent Quantum Feedback Control

2017 ◽  
Vol 62 (2) ◽  
pp. 998-1003 ◽  
Author(s):  
Shanon L. Vuglar ◽  
Ian R. Petersen
Keyword(s):  
Feedback Control ◽  
Quantum Feedback ◽  
Coherent Quantum ◽  
Quantum Noises ◽  
Physical Realizability

Influences of quantum noises on direct-modulated properties of 1.3-μm InGaAsP/InP laser diodes

2006 ◽  
Vol 15 (9) ◽  
pp. 2125-2129
Author(s):  
Wang Jun ◽  
Ma Xiao-Yu ◽  
Bai Yi-Ming ◽  
Cao Li ◽  
Wu Da-Jin
Keyword(s):  
Laser Diodes ◽  
Quantum Noises

scholarly journals Effects of quantum noises and noisy quantum operations on entanglement and special dense coding

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
Sylvanus Quek ◽  
Ziang Li ◽  
Ye Yeo
Keyword(s):  
Dense Coding ◽  
Quantum Operations ◽  
Quantum Noises

Devastating Effects of Quantum Noises and Noisy Quantum Operations on Entanglement and Quantum Information Protocols

2011 ◽  
Author(s):  
Ye Yeo ◽  
Timothy Ralph ◽  
Ping Koy Lam
Keyword(s):  
Quantum Information ◽  
Quantum Operations ◽  
Quantum Noises

scholarly journals A Novel Method to against Quantum Noises in Quantum Teleportation

2020 ◽  
Vol 2 (1) ◽  
pp. 33-55
Author(s):  
Shengyao Wu ◽  
Wenjie Liu ◽  
Zhiguo Qu
Keyword(s):  
Quantum Teleportation ◽  
Novel Method ◽  
Quantum Noises

Stochastic Resonance with Unital Quantum Noise

2019 ◽  
Vol 18 (03) ◽  
pp. 1950015 ◽  
Author(s):  
Nicolas Gillard ◽  
Étienne Belin ◽  
François Chapeau-Blondeau
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Stochastic Resonance ◽  
Quantum Noise ◽  
Quantum Information Processing ◽  
Broad Class ◽  
Resonance Effects ◽  
Estimation Efficiency ◽  
Bit Flip ◽  
Quantum Noises

The fundamental quantum information processing task of estimating the phase of a qubit is considered. Following quantum measurement, the estimation efficiency is evaluated by the classical Fisher information which determines the best performance limiting any estimator and achievable by the maximum likelihood estimator. The estimation process is analyzed in the presence of decoherence represented by essential quantum noises that can affect the qubit and belonging to the broad class of unital quantum noises. Such a class especially contains the bit-flip, the phase-flip, the depolarizing noises, or the whole family of Pauli noises. As the level of noise is increased, we report the possibility of non-standard behaviors where the estimation efficiency does not necessarily deteriorate uniformly, but can experience non-monotonic variations. Regimes are found where higher noise levels prove more favorable to estimation. Such behaviors are related to stochastic resonance effects in signal estimation, shown here feasible for the first time with unital quantum noises. The results provide enhanced appreciation of quantum noise or decoherence, manifesting that it is not always detrimental for quantum information processing.

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