info:eu-repo/semantics/article
Criticality of environmental information obtainable by dynamically controlled quantum probes
Date
2016-10-21Registration in:
Zwick, Analía Elizabeth; Alvarez, Gonzalo Agustin; Kurizki, Gershon; Criticality of environmental information obtainable by dynamically controlled quantum probes; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 94; 4; 21-10-2016; 42122-1/9
1050-2947
2469-9934
CONICET Digital
CONICET
Author
Zwick, Analía Elizabeth
Alvarez, Gonzalo Agustin
Kurizki, Gershon
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 of generalized Ornstein-Uhlenbeck processes. The criticality is intrinsic to the environmental fluctuations but emerges only when the probe is subject to suitable dynamical control aimed at inferring the memory time. A sharp transition is anticipated 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 characterizes open quantum-system dynamics and is important for attaining the highest estimation precision of the environment memory time under experimental limitations.