How to detect qubit environment entanglement in pure dephasing evolutions

Katarzyna Roszak; Katarzyna Roszak; Katarzyna Roszak; Damian Kwiatkowski; Damian Kwiatkowski; Damian Kwiatkowski; Łukasz Cywinski; Łukasz Cywinski; Łukasz Cywinski

doi:10.1364/QIM.2019.F5A.5

Quantum Information and Measurement (QIM) V: Quantum Technologies
OSA Technical Digest (Optica Publishing Group, 2019),
paper F5A.5
•https://doi.org/10.1364/QIM.2019.F5A.5

How to detect qubit environment entanglement in pure dephasing evolutions

Katarzyna Roszak, Damian Kwiatkowski, and Łukasz Cywinski

Quantum Information and Measurement 2019

Rome Italy
4–6 April 2019
ISBN: 978-1-943580-56-9

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Poster Session II (F5A)

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K. Roszak, D. Kwiatkowski, and Ł. Cywinski, "How to detect qubit environment entanglement in pure dephasing evolutions," in Quantum Information and Measurement (QIM) V: Quantum Technologies, OSA Technical Digest (Optica Publishing Group, 2019), paper F5A.5.

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Abstract

We propose a straightforward experimental test for qubit-environment entanglement generation during qubit pure dephasing. The protocol is implemented using measurements and operations on the qubit only - no measurement of the system-environment state is required.

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