How to detect qubit-environment entanglement generated during qubit dephasing
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2019-08-16 |
| Journal | Physical review. A/Physical review, A |
| Authors | Katarzyna Roszak, Damian Kwiatkowski, Ćukasz CywiĆski |
| Institutions | Czech Academy of Sciences, Institute of Physics, Polish Academy of Sciences |
| Citations | 25 |
Abstract
Section titled âAbstractâWe propose a straightforward experimental protocol to test whether\nqubit-environment entanglement is generated during pure dephasing of a qubit.\nThe protocol is implemented using only measurements and operations on the qubit\n- it does not involve the measurement of the system-environment state of\ninterest, but the preparation and measurement of the qubit in two simple\nvariations. A difference in the time dependencies of qubit coherence between\nthe two cases testifies to the presence of entanglement in the state of\ninterest. Furthermore, it signifies that the environment-induced noise\nexperienced by the qubit cannot be modeled as a classical stochastic process\nindependent of the qubit state. We demonstrate the operation of this protocol\non a realistically modeled nitrogen vacancy center spin qubit in diamond\ninteracting with a nuclear spin environment, and show that the generation of\nentanglement should be easily observable in this case.\n
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 2007 - Decoherence and the Quantum-to-Classical Transition
- 2006 - Quantum Decoherence: Poincaré Seminar 2005