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6CCVD Research

Spin decoherence in inhomogeneous media

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2020-02-10
JournalNew Journal of Physics
AuthorsJ. A. Crosse
InstitutionsNew York University Shanghai

Abstract

Section titled ā€œAbstractā€

Abstract A Greenā€™s function formalism for describing the decoherence of a ā€˜central spinā€™ in inhomogeneous media is developed. By embedding the ā€˜central spinā€™ in a background medium and performing real-cavity, local-field corrections on the macroscopic fields at the location of the ā€˜central spinā€™ one can show that the Greenā€™s function splits up into two main contributions, a contribution that is related to the bulk properties of the background medium and a contribution that is related inhomogeneities within the background medium. As an example, the coherence time of a shallow NV center in diamond close to a planar interface, both in the absence and presence of surface spins, is computed. It is found that the coherence time of the NV center increases as it moves away from the interface and, at distances greater than ā‰ˆ1 nm, the interaction with the interface is negligible with the main source of decoherence coming from the interaction with the surface spins. Above ā‰ˆ50 nm the interaction with the surface spins is also negligible and one recovers the bulk coherence time.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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