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Open Quantum Systems Decoherence

Criticality of environmental information obtainable by dynamically controlled quantum probes

arXiv
Authors: Analia Zwick, Gonzalo A. Alvarez, Gershon Kurizki

Year

2015

Paper ID

27117

Status

Preprint

Abstract Read

~2 min

Abstract Words

101

Citations

N/A

Abstract

A universal approach to decoherence control combined with quantum estimation theory reveals a critical behavior, akin to a phase transition, of the information obtainable by a qubit probe concerning the memory time of environmental fluctuations. This criticality emerges only when the probe is subject to dynamical control. It gives rise to a sharp transition between two dynamical phases characterized by either a short or long memory time compared to the probing time. This phase-transition of the environmental information is a fundamental feature that facilitates the attainment of the highest estimation precision of the environment memory-time and the characterization of probe dynamics.

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  • A universal approach to decoherence control combined with quantum estimation theory reveals a critical behavior, akin to a phase transition, of the information obtainable by a...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1509.06516 [2] arXiv https://arxiv.org/abs/1509.06516 [3] Publisher https://arxiv.org/abs/1509.06516

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