Quantum discord as a tool for comparing collapse models and decoherence

Shreya Banerjee, Sayantani Bera, Tejinder P. Singh

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The quantum to classical transition maybe caused by decoherence or by dynamical collapse of the wave-function. We propose quantum discord as a tool, (1) for comparing and contrasting the role of a collapse model (Continuous Spontaneous Localisation) and various sources of decoherence (environmental and fundamental), (2) for detecting collapse model and fundamental decoherence for an experimentally demonstrated macroscopic entanglement. We discuss the experimental times which will lead to the detection of either Continuous Spontaneous Localisation or fundamental decoherence. We further put bounds on the collapse parameters from this experiment for quantum discord.

Original languageEnglish
Pages (from-to)3778-3785
Number of pages8
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume380
Issue number45
DOIs
StatePublished - 25 Nov 2016
Externally publishedYes

Keywords

  • Collapse model
  • Decoherence
  • Entanglement
  • Measurement problem
  • Quantum discord
  • Quantum to classical transition

ASJC Scopus subject areas

  • General Physics and Astronomy

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