Role of Nuclear Quadrupole Coupling on Decoherence and Relaxation of Central Spins in Quantum Dots

2012/06/30 by Nikolai A. Sinitsyn, N. A. Sinitsyn, Yan Li +4 · 2 citations
Engineering · Physics and Astronomy · #Atomic physics #Condensed matter physics #Coupling (piping) #Hyperfine structure #Materials science #Physics #Quadrupole #Quantum #Quantum and electron transport phenomena #Quantum decoherence #Quantum dot #Quantum mechanics #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #Spin (aerodynamics) #Spins #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevlett.109.166605

published as Phys. Rev. Lett. 109, 166605 (2012) · 6 pages, 7 figures

arxiv created 2012/09/12 · openalex publication_date 2012/10/18 · arxiv updated 2015/06/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Strain-induced gradients of local electric fields in semiconductor quantum dots can couple to the quadrupole moments of nuclear spins. We develop a theory describing the influence of this quadrupolar coupling on the spin correlators of electron and hole "central" spins localized in such dots. We show that when the quadrupolar coupling strength is comparable to or larger than the hyperfine coupling strength between nuclei and the central spin, the relaxation rate of the central spin is strongly enhanced and can be exponential. We demonstrate a good agreement with recent experiments on spin relaxation in hole-doped (In,Ga)As self-assembled quantum dots.

Citations

• Stabilization of the Electron-Nuclear Spin Orientation in Quantum Dots by the Nuclear Quadrupole Interaction
• Theory of the spin bath
• Quantum computing by optical control of electron spins
• Hole–spin dephasing time associated with hyperfine interaction in quantum dots
• Spintronics: Fundamentals and applications
• Numerical Modeling of the Central Spin Problem Using the Spin-Coherent-StatePRepresentation
• Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots
• Spin Echo of a Single Electron Spin in a Quantum Dot
• Spins in few-electron quantum dots

Cited by

• Long-time coherence in fourth-order spin correlation functions
• Hybrid spin noise spectroscopy and the spin Hall effect