Phonon-induced decoherence in color-center qubits
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2024-01-16 |
| Journal | Physical Review Research |
| Authors | Prajit Dhara, Saikat Guha |
| Institutions | University of Arizona |
| Citations | 5 |
Abstract
Section titled āAbstractāElectron spin states of solid-state defects such as nitrogen- and silicon-vacancy in diamond are a leading quantum-memory candidate for quantum communications and computing. Via open-quantum-systems modeling of spin-phonon couplingāthe major contributor of decoherenceāat 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. Published by the American Physical Society 2024