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6CCVD Research

Spin decoherence in inhomogeneous media

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2020-02-10
JournalNew Journal of Physics
AuthorsJ. A. Crosse
InstitutionsNew York University Shanghai

Abstract

Section titled “Abstract”

Abstract A Green’s function formalism for describing the decoherence of a ‘central spin’ in inhomogeneous media is developed. By embedding the ‘central spin’ in a background medium and performing real-cavity, local-field corrections on the macroscopic fields at the location of the ‘central spin’ one can show that the Green’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 ≈1 nm, the interaction with the interface is negligible with the main source of decoherence coming from the interaction with the surface spins. Above ≈50 nm the interaction with the surface spins is also negligible and one recovers the bulk coherence time.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 1998 - Quantum computation with quantum dots [Crossref]
  2. 1999 - Quantum information processing using quantum dot spins and cavity QED [Crossref]
  3. 1987 - Dynamics of the dissipative two-state system [Crossref]
  4. 2017 - Quantum many-body theory for electron spin decoherence in nanoscale nuclear spin baths [Crossref]
  5. 2006 - Coherence of spin qubits in silicon [Crossref]
  6. 2013 - Quantum control over single spins in diamond [Crossref]
  7. 2014 - Uncovering many-body correlations in nanoscale nuclear spin baths by central spin decoherence [Crossref]
  8. 2016 - Coherence times of precise depth controlled NV centers in diamond [Crossref]
  9. 2017 - Depth-dependent decoherence caused by surface and external spins for NV centers in diamond [Crossref]
  10. 2014 - Probing surface noise with depth-calibrated spins in diamond [Crossref]

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