Anomalous external-magnetic-field dependence of dephasing in a spin bath
arXiv:2403.09952 · doi:10.1103/PhysRevA.86.032333
Abstract
We theoretically investigate the dephasing of a central spin-1 model. An interesting mechanism of spin decoherence is found with this model, namely {\em hyperfine mediated spectral diffusion}. This mechanism contains both the features of dipolar interactions induced spectral diffusion and hyperfine mediated interactions. We also find an anomalous magnetic field dependence of decoherence, which is caused by the competition between crystal field splitting and Zeeman splitting of the central spin. As the external magnetic field increases, in the V type level structure regime, the decoherence rate becomes much stronger; while in the cascade type level structure regime, just like localized electron spin in quantum dots, the decoherence rate becomes much weaker.
arXiv comment7 pages, 5 figures
References in corpus (31)
- Quantum Computation with Quantum Dots
- Quantum Computing
- Spins in few-electron quantum dots
- Electron spin decoherence in quantum dots due to interaction with nuclei
- Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
- Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
- Ab initio supercell calculations on nitrogen-vacancy center in diamond: its electronic structure and hyperfine tensors
- Quantum theory for electron spin decoherence induced by nuclear spin dynamics in semiconductor quantum computer architectures: Spectral diffusion of localized electron spins in the nuclear solid-state environment
- Theory of nuclear induced spectral diffusion: Spin decoherence of phosphorus donors in Si and GaAs quantum dots
- Electron spin evolution induced by interaction with nuclei in a quantum dot
- Coherence of single spins coupled to a nuclear spin bath of varying density
- Decoherence and dynamical decoupling control of nitrogen-vacancy center electron spins in nuclear spin baths
- Quantum many-body theory of qubit decoherence in a finite-size spin bath
- Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
- Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath
- Pure quantum dephasing of a solid state electron spin qubit in a large nuclear spin bath coupled by long-range hyperfine-mediated interactions
- An efficient scheme for numerical simulations of the spin-bath decoherence
- Quantum theory of spectral diffusion induced electron spin decoherence
- Electron spin coherence in semiconductors: Considerations for a spin-based solid state quantum computer architecture
- Quantum many-body theory of qubit decoherence in a finite-size spin bath. II. Ensemble dynamics
- Analytical Solution of Electron Spin Decoherence Through Hyperfine Interaction in a Quantum Dot
- Coherence and control of quantum registers based on electronic spin in a nuclear spin bath
- Control of electron spin decoherence caused by electron-nuclear spin dynamics in a quantum dot
- Single Electron Spin Decoherence by Nuclear Spin Bath: Linked Cluster Expansion Approach
- Anomalous decoherence effect in a quantum bath
- Hyperfine interaction induced decoherence of electron spins in quantum dots
- Exponential decay in a spin bath
- Free-induction decay and envelope modulations in a narrowed nuclear spin bath
- Dephasing of electron spin qubits due to their interaction with nuclei in quantum dots
- Master equation approach to the central spin decoherence problem: the uniform coupling model and the role of projection operators
- Spin echo decay at low magnetic fields in a nuclear spin bath