Relaxation of hole spins in quantum dots via two-phonon processes

Abstract

We investigate theoretically spin relaxation in heavy hole quantum dots in low external magnetic fields. We demonstrate that two-phonon processes and spin-orbit interaction are experimentally relevant and provide an explanation for the recently observed saturation of the spin relaxation rate in heavy hole quantum dots with vanishing magnetic fields. We propose further experiments to identify the relevant spin relaxation mechanisms in low magnetic fields.

5 pages, 2 figures

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• Spins in few-electron quantum dots
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Spin relaxation and decoherence of holes in quantum dots
• Electrical control of spin relaxation in a quantum dot
• Observation of extremely slow hole spin relaxation in self-assembled quantum dots
• Hole - Nuclear Spin Interaction in Quantum Dots
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
• Geometrical spin dephasing in quantum dots
• Optical detection of single electron spin resonance in a quantum dot
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• Prospects for Spin-Based Quantum Computing
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• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Optimal operation points for ultrafast, highly coherent Ge hole spin-orbit qubits
• Intrinsic spin fluctuations reveal the dynamical response function of holes coupled to nuclear spin baths in (In,Ga)As quantum dots
• Hybridization and spin decoherence in heavy-hole quantum dots
• Optical Spin Noise of a Single Hole Spin Localized in an (InGa)As Quantum Dot
• Tunable g factor and phonon-mediated hole spin relaxation in Ge/Si nanowire quantum dots
• Spin Relaxation due to Charge Noise
• Phonon-Mediated Decay of Singlet-Triplet Qubits in Double Quantum Dots
• Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling
• High resolution coherent population trapping on a single hole spin in a semiconductor
• Spin blockade as a probe of Zeeman interactions in hole quantum dots
• Deterministic Single-Phonon Source Triggered by a Single Photon
• Radiative cascade from quantum dot metastable spin-blockaded biexciton
• Temperature dependence of hole spin coherence in (In,Ga)As quantum dots measured by mode-locking and echo techniques
• Hole-phonon interactions in quantum dots: Effects of phonon confinement and encapsulation materials on spin-orbit qubits
• Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule
• Effect of strain on hyperfine-induced hole-spin decoherence in quantum dots
• Spin-orbit induced hole spin relaxation in InAs and GaAs quantum dots
• Hyperfine interaction mediated exciton spin relaxation in (In,Ga)As quantum dots
• All electrically controlled quantum gates for single heavy hole spin qubits
• Non-monotonic spin relaxation and decoherence in graphene quantum dots with spin-orbit interactions
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Atomistic theory of spin relaxation in self-assembled In${}_{1-x}$Ga${}_x$As/GaAs quantum dots at zero magnetic field
• Significance of an external magnetic field on two-phonon processes in gated lateral semiconductor quantum dots
• Slow Exciton Spin Relaxation in Single Self-Assembled In${}_{1-x}$Ga${}_x$As/GaAs Quantum Dots
• Optical initialization of hole spins in p-doped quantum dots: orientation efficiency and loss of coherence
• Berry-phase induced entanglement of hole-spin qubits in a microwave cavity
• Tuning of the hole spin relaxation time in single self-assembled In${}_{1-x}$Ga${}_x$As/GaAs quantum dots by electric field
• Longitudinal coupling between electrically driven spin-qubits and a resonator
• Hole spin coherence in InAs/InAlGaAs self-assembled quantum dots emitting at telecom wavelengths
• Heavy-hole spin relaxation in quantum dots: Isotropic versus anisotropic effects
• Confinement sensitivity in quantum dot singlet-triplet relaxation
• Zero temperature geometric spin dephasing on a ring in presence of an Ohmic environment