Quantum superpositions in dissipative environments: decoherence and deconstruction

2020 ◽  
pp. 199-238
Author(s):  
P L Knight ◽  
B M Garraway
Keyword(s):  
Quantum Superpositions ◽  
Dissipative Environments

scholarly journals Attosecond XUV probing of vibronic quantum superpositions in Br2+

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Yuki Kobayashi ◽  
Daniel M. Neumark ◽  
Stephen R. Leone
Keyword(s):  
Quantum Superpositions

scholarly journals DISSIPATIVE QUANTUM DISORDERED MODELS

2006 ◽  
Vol 20 (19) ◽  
pp. 2795-2804 ◽  
Author(s):  
LETICIA F. CUGLIANDOLO
Keyword(s):  
Glassy Phase ◽  
Quantum Critical Point ◽  
Mean Field ◽  
Static Properties ◽  
One Dimensional ◽  
Time Dynamics ◽  
Long Range Interactions ◽  
Disordered Models ◽  
Different Types ◽  
Dissipative Environments

This article reviews recent studies of mean-field and one dimensional quantum disordered spin systems coupled to different types of dissipative environments. The main issues discussed are: (i) The real-time dynamics in the glassy phase and how they compare to the behaviour of the same models in their classical limit. (ii) The phase transition separating the ordered – glassy – phase from the disordered phase that, for some long-range interactions, is of second order at high temperatures and of first order close to the quantum critical point (similarly to what has been observed in random dipolar magnets). (iii) The static properties of the Griffiths phase in random king chains. (iv) The dependence of all these properties on the environment. The analytic and numeric techniques used to derive these results are briefly mentioned.

scholarly journals Probing macroscopic quantum superpositions with nanorotors

2018 ◽  
Vol 20 (12) ◽  
pp. 122001 ◽  
Author(s):  
Benjamin A Stickler ◽  
Birthe Papendell ◽  
Stefan Kuhn ◽  
Björn Schrinski ◽  
James Millen ◽  
...  
Keyword(s):  
Macroscopic Quantum ◽  
Quantum Superpositions

Experimental realization of a concatenated Greenberger–Horne–Zeilinger state for macroscopic quantum superpositions

2014 ◽  
Vol 8 (5) ◽  
pp. 364-368 ◽  
Author(s):  
He Lu ◽  
Luo-Kan Chen ◽  
Chang Liu ◽  
Ping Xu ◽  
Xing-Can Yao ◽  
...  
Keyword(s):  
Experimental Realization ◽  
Macroscopic Quantum ◽  
Quantum Superpositions

scholarly journals Quantum network exploration with a faulty sense of direction

2014 ◽  
Vol 14 (13&14) ◽  
pp. 1238-1250
Author(s):  
Jaroslaw A. Miszczak ◽  
Przemyslaw Sadowski
Keyword(s):  
Mobile Agents ◽  
Classical Case ◽  
Adaptive Strategies ◽  
Quantum Network ◽  
Sense Of Direction ◽  
Additional Control ◽  
Quantum Superpositions

We develop a model which can be used to analyse the scenario of exploring quantum network with a distracted sense of direction. Using this model we analyse the behaviour of quantum mobile agents operating with non-adaptive and adaptive strategies which can be employed in this scenario. We introduce the notion of node visiting suitable for analysing quantum superpositions of states by distinguishing between visiting and attaining a position. We show that without a proper model of adaptiveness, it is not possible for the party representing the distraction in the sense of direction, to obtain the results analogous to the classical case. Moreover, with additional control resources the total number of attained positions is maintained and the number of visited positions is strictly limited.

Non-Markovian effect of the fractional damping environment and Newton’s second law of motion

2018 ◽  
Vol 32 (19) ◽  
pp. 1850210
Author(s):  
Chun-Yang Wang ◽  
Zhao-Peng Sun ◽  
Ming Qin ◽  
Yu-Qing Xu ◽  
Shu-Qin Lv ◽  
...  
Keyword(s):  
Diffusion Process ◽  
Mean Square Displacement ◽  
Dynamical Analysis ◽  
Second Law ◽  
Mean Square ◽  
Fractional Damping ◽  
Dynamical Mechanism ◽  
Brownian Particles ◽  
The Mean ◽  
Dissipative Environments

We report, in this paper, a recent study on the dynamical mechanism of Brownian particles diffusing in the fractional damping environment, where several important quantities such as the mean square displacement (MSD) and mean square velocity are calculated for dynamical analysis. A particular type of backward motion is found in the diffusion process. The reason of it is analyzed intrinsically by comparing with the diffusion in various dissipative environments. Results show that the diffusion in the fractional damping environment obeys the Langevin dynamics which is quite different form what is expected.

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