scholarly journals Environmental noise effects on entanglement fidelity of exchange-coupled semiconductor spin qubits

2017 ◽  
Vol 95 (8) ◽  
Author(s):  
Robert E. Throckmorton ◽  
Edwin Barnes ◽  
S. Das Sarma
Keyword(s):  
Environmental Noise ◽  
Spin Qubits ◽  
Noise Effects ◽  
Coupled Semiconductor

scholarly journals Effects of noise on fidelity in spin–orbit qubit transformations

2018 ◽  
Vol 32 (17) ◽  
pp. 1840028 ◽  
Author(s):  
L. Ulčakar ◽  
A. Ramšak
Keyword(s):  
Ground State ◽  
State Energy ◽  
Rotation Angle ◽  
Linear Time ◽  
Probability Distributions ◽  
Spin Rotation ◽  
Time Dependent ◽  
Spin Qubits ◽  
Noise Effects ◽  
Rashba Interaction

We analyze nonadiabatic non-Abelian holonomic transformations of spin-qubits confined to a linear time-dependent harmonic trap with time-dependent Rashba interaction. For this system, exact results can be derived for spin-rotation angle which also enables exact treatment of white gate-noise effects. We concentrate, in particular, on the reliability of cyclic transformations quantified by fidelity defined by the probability that the qubit after one full cycle remains in the ground-state energy manifold. The formalism allows exact analysis of spin transformations that optimize final fidelity. Various examples of time-dependent fidelity probability distributions are presented and discussed.

scholarly journals Evidence for Environmental Noise Effects on Health for the United Kingdom Policy Context: A Systematic Review of the Effects of Environmental Noise on Mental Health, Wellbeing, Quality of Life, Cancer, Dementia, Birth, Reproductive Outcomes, and Cognition

2020 ◽  
Vol 17 (2) ◽  
pp. 393 ◽  
Author(s):  
Charlotte Clark ◽  
Clare Crumpler ◽  
Hilary Notley
Keyword(s):  
Quality Of Life ◽  
Systematic Review ◽  
Road Traffic ◽  
Traffic Noise ◽  
Harmful Effect ◽  
Environmental Noise ◽  
Road Traffic Noise ◽  
Noise Effects ◽  
Quality Evidence

This systematic review commissioned by the UK Department for the Environment, Food and Rural Affairs (Defra), considers how the evidence base for noise effects on health has changed following the recent reviews undertaken for the WHO Environmental Noise Guidelines. This systematic review assesses the quality of the evidence for environmental noise effects on mental health, wellbeing, and quality of life; birth and reproductive outcomes; and cognition for papers published since the WHO reviews (mid-2015 to March 2019), as well as for cancer and dementia (January 2014 to March 2019). Using the GRADE methodology (Grading of Recommendations Assessment, Development and Evaluation) most evidence was rated as low quality as opposed to very low quality in the previous reviews. There is now low-quality evidence for a harmful effect of road traffic noise on medication use and interview measures of depression and anxiety and low quality evidence for a harmful effect of road traffic noise, aircraft noise, and railway noise on some cancer outcomes. Many other conclusions from the WHO evidence reviews remain unchanged. The conclusions remain limited by the low number of studies for many outcomes. The quantification of health effects for other noise sources including wind turbine, neighbour, industrial, and combined noise remains a research priority.

scholarly journals Dynamics of two coupled semiconductor spin qubits in a noisy environment

2016 ◽  
Vol 94 (4) ◽  
Author(s):  
S. Das Sarma ◽  
Robert E. Throckmorton ◽  
Yang-Le Wu
Keyword(s):  
Noisy Environment ◽  
Spin Qubits ◽  
Coupled Semiconductor

scholarly journals WHO Environmental Noise Guidelines for the European Region: A Systematic Review on Environmental Noise and Quality of Life, Wellbeing and Mental Health

2018 ◽  
Vol 15 (11) ◽  
pp. 2400 ◽  
Author(s):  
Charlotte Clark ◽  
Katarina Paunovic
Keyword(s):  
Quality Of Life ◽  
Mental Health ◽  
Systematic Review ◽  
Environmental Noise ◽  
Road Traffic Noise ◽  
Noise Sources ◽  
Cross Sectional ◽  
Noise Effects ◽  
Railway Noise

This systematic review assesses the quality of the evidence across studies on the effect of environmental noise (road traffic noise, aircraft noise, railway noise, wind-turbine noise) on quality of life, wellbeing and mental health. Quantitative studies of noise effects on children and adults published from January 2005 up to October 2015 were reviewed. A total of 29 papers were identified. 90% of the papers were of cross-sectional design, with fewer studies of longitudinal or intervention design. Outcomes included depression and anxiety, medication use and childhood emotional problems. The quality of the evidence across the studies for each individual noise source was assessed using an adaptation of the GRADE methodology. Overall, given the predominance of cross-sectional studies, most evidence was rated as very low quality, with evidence of effects only being observed for some noise sources and outcomes. These ratings reflect inconsistent findings across studies, the small number of studies and a lack of methodological robustness within some domains. Overall, there are few studies of clinically significant mental health outcomes; few studies of railway noise exposure; and studies of large samples are needed. The lack of evidence for noise effects across studies for many of the quality of life, wellbeing and mental health domains examined does not necessarily mean that there are no effects: rather, that they have not yet been studied robustly for different noise sources.

Noise Effects on Generalized Chaos Synchronization in Semiconductor Lasers

2014 ◽  
Vol 2 ◽  
pp. 413-416
Author(s):  
Kenichi Arai ◽  
Susumu Shinohara ◽  
Satoshi Sunada ◽  
Kazuyuki Yoshimura ◽  
Takahisa Harayama ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Chaos Synchronization ◽  
Noise Effects
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