Abstract
We combine the collisional picture for open system dynamics and the control of the rate of decoherence provided by the quantum (anti-)Zeno effect to illustrate the temporal unfolding of the redundant encoding of information into a multipartite environment that is at the basis of Quantum Darwinism, and to control it. The rate at which such encoding occurs can be enhanced or suppressed by tuning the dynamical conditions of system-environment interaction in a suitable and remarkably simple manner. This would help the design of a new generation of quantum experiments addressing the elusive phenomenology of Quantum Darwinism and thus its characterization.
Highlights
Quantum Darwinism (QD) is an interesting theoretical framework that strives at explaining the emergence of objective reality out of quantum superpositions, a most fundamental question in modern quantum theory, in terms of the proliferation or redundant records of the quantum state of a quantum system in the environment [1].The basic idea is that, due to their joint interaction, an environment gets entangled with the system, acquiring information about its state [2,3]
We combine the collisional picture for open system dynamics and the control of the rate of decoherence provided by the quantumZeno effect to illustrate the temporal unfolding of the redundant encoding of information into a multipartite environment that is at the basis of quantum Darwinism, and to control it
We show that does our approach provides a transparent picture of the process of successive redundant encoding of information that results in the emergence of objective reality, and it allows for the design of simple control strategies for the harnessing of quantum Darwinism itself
Summary
Quantum Darwinism (QD) is an interesting theoretical framework that strives at explaining the emergence of objective reality out of quantum superpositions, a most fundamental question in modern quantum theory, in terms of the proliferation or redundant records of the quantum state of a quantum system in the environment [1]. In this work we address this issue by adopting a collision-model approach to open quantum system dynamics [29,30,31,32] in which the interaction with the environment, consisting of an infinite number of identical elements dubbed ancillae, takes place through a sequence of rapid interactions (collisions) between the system and the ancillae. This is very close to real physical situations, such as, e.g., learning about the state of a system by observing.
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