Various pointer states approaches to polar modular values

2018 ◽  
Vol 59 (4) ◽  
pp. 042107 ◽  
Author(s):  
Le Bin Ho ◽  
Nobuyuki Imoto
Keyword(s):  
Pointer States

scholarly journals Robustness and Diffusion of Pointer States

2000 ◽  
Vol 85 (17) ◽  
pp. 3552-3555 ◽  
Author(s):  
Lajos Diósi ◽  
Claus Kiefer
Keyword(s):  
Pointer States ◽  
And Diffusion

scholarly journals Dynamics of periodic anticrossings: Decoherence, pointer states, and hysteresis curves

2008 ◽  
Vol 77 (1) ◽  
Author(s):  
Péter Földi ◽  
Mihály G. Benedict ◽  
F. M. Peeters
Keyword(s):  
Hysteresis Curves ◽  
Pointer States

scholarly journals Decoherence and pointer states in small antiferromagnets: A benchmark test

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Hylke Donker ◽  
Hans De Raedt ◽  
Mikhail Katsnelson
Keyword(s):  
Quantum Measurement ◽  
The Self ◽  
Environment Interaction ◽  
Benchmark Test ◽  
System Environment ◽  
Preferred Basis ◽  
Measurement Limit ◽  
Pointer States ◽  
Decoherence Process

We study the decoherence process of a four spin-1/2 antiferromagnet that is coupled to an environment of spin-1/2 particles. The preferred basis of the antiferromagnet is discussed in two limiting cases and we identify two exact pointer states. Decoherence near the two limits is examined whereby entropy is used to quantify the robustness of states against environmental coupling. We find that close to the quantum measurement limit, the self-Hamiltonian of the system of interest can become dynamically relevant on macroscopic timescales. We illustrate this point by explicitly constructing a state that is more robust than (generic) states diagonal in the system-environment interaction Hamiltonian.

scholarly journals Unconditional Pointer States from Conditional Master Equations

2001 ◽  
Vol 86 (3) ◽  
pp. 373-376 ◽  
Author(s):  
Diego A. R. Dalvit ◽  
Jacek Dziarmaga ◽  
Wojciech H. Zurek
Keyword(s):  
Master Equations ◽  
Pointer States

scholarly journals Advantages of nonclassical pointer states in postselected weak measurements

2015 ◽  
Vol 92 (2) ◽  
Author(s):  
Yusuf Turek ◽  
W. Maimaiti ◽  
Yutaka Shikano ◽  
Chang-Pu Sun ◽  
M. Al-Amri
Keyword(s):  
Weak Measurements ◽  
Pointer States

scholarly journals Reference Frame Induced Symmetry Breaking on Holographic Screens

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 408
Author(s):  
Chris Fields ◽  
James F. Glazebrook ◽  
Antonino Marcianò
Keyword(s):  
Symmetry Breaking ◽  
Reference Frame ◽  
Reference Frames ◽  
A Priori ◽  
Quantum Systems ◽  
Classical Information ◽  
Pointer States ◽  
Finite Quantum Systems ◽  
Holographic Screen ◽  
Holographic Screens

Any interaction between finite quantum systems in a separable joint state can be viewed as encoding classical information on an induced holographic screen. Here we show that when such an interaction is represented as a measurement, the quantum reference frames (QRFs) deployed to identify systems and pick out their pointer states induce decoherence, breaking the symmetry of the holographic encoding in an observer-relative way. Observable entanglement, contextuality, and classical memory are, in this representation, logical and temporal relations between QRFs. Sharing entanglement as a resource requires a priori shared QRFs.

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