Phonon-induced decoherence in color-center qubits

Prajit Dhara, Saikat Guha

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Electron spin states of solid-state defects such as nitrogen- and silicon-vacancy color centers in diamond are a leading quantum-memory candidate for quantum communications and computing. Via open-quantum-systems modeling of spin-phonon coupling - the major contributor of decoherence - at a given temperature, we derive the time dynamics of the density operator of an electron-spin qubit. We use our model to corroborate experimentally measured decoherence rates. We further derive the temporal decay of distillable entanglement in spin-spin entangled states heralded via photonic Bell-state measurements. Extensions of our model to include other decoherence mechanisms, e.g., undesired hyperfine couplings to the neighboring nuclear-spin environment, will pave the way to a rigorous predictive model for engineering artificial-atom qubits with desirable properties.

Original languageEnglish (US)
Article number013055
JournalPhysical Review Research
Issue number1
StatePublished - Jan 2024

ASJC Scopus subject areas

  • General Physics and Astronomy


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