Quantum Darwinism in quantum Brownian motion: the vacuum as a witness

Abstract

We study quantum Darwinism -- the redundant recording of information about a decohering system by its environment -- in zero-temperature quantum Brownian motion. An initially nonlocal quantum state leaves a record whose redundancy increases rapidly with its spatial extent. Significant delocalization (e.g., a Schroedinger's Cat state) causes high redundancy: many observers can measure the system's position without perturbing it. This explains the objective (i.e. classical) existence of einselected, decoherence-resistant pointer states of macroscopic objects.

5 pages

References in corpus (2)

• Symplectic invariants, entropic measures and correlations of Gaussian states
• A simple example of "Quantum Darwinism": Redundant information storage in many-spin environments

Cited by in corpus (30)

• Quantum Darwinism
• Quantum Decoherence
• Dynamical phases for the evolution of the entanglement between two oscillators coupled to the same environment
• Quantum Darwinism in a hazy environment
• The Rise and Fall of Redundancy in Decoherence and Quantum Darwinism
• Relative States and the Environment: Einselection, Envariance, Quantum Darwinism, and the Existential Interpretation
• Quantum Decoherence of Two Qubits
• Quantum Theory of the Classical: Einselection, Envariance, Quantum Darwinism and Extantons
• Eavesdropping on the Decohering Environment: Quantum Darwinism, Amplification, and the Origin of Objective Classical Reality
• Quantum Darwinism and non-Markovianity in a model of quantum harmonic oscillators
• Objectivisation In Simplified Quantum Brownian Motion Models
• Einselection, Equilibrium and Cosmology
• Pointer states and quantum Darwinism with 2-body interactions
• Emergence of the Classical from within the Quantum Universe
• A Solvable Model of Quantum Darwinism-Encoding Transitions
• Amplification, inference, and the manifestation of objective classical information
• Classical Simulation of Arbitrary Quantum Noise
• Emergence of Objectivity for Quantum Many-Body Systems
• Information Loss Pathways in a Numerically Exact Simulation of a non-Markovian Open Quantum System
• Complementarity between decoherence and information retrieval from the environment
• Encoding position by spins: Objectivity in the boson-spin model
• Classical branches and entanglement structure in the wavefunction of cosmological fluctuations
• On the relation between quantum Darwinism and approximate quantum Markovianity
• How Quantum is the Classical World?
• Does Decoherence Make Observations Classical?
• The Copenhagen Interpretation as an Emergent Phenomenon
• Environment-Assisted Shortcuts to Adiabaticity
• Over forty years of research towards the understanding of Quantum Brownian Motion -- the contributions of A. O. Caldeira
• Temperature and non-Markovian parameter estimation in quantum Brownian motion
• Decoherence and objectivity in higher spin environments