Phonon-assisted relaxation between hole states in quantum dot molecules

Abstract

We study theoretically phonon-assisted relaxation and inelastic tunneling of holes in a double quantum dot. We derive hole states and relaxation rates from kp Hamiltonians and show that there is a finite distance between the dots where lifetimes of hole states are very long which is related to vanishing tunnel coupling. We show also that the light hole admixture to hole states can considerably affect the hole relaxation rates even though its magnitude is very small.

References in corpus (6)

• Observation of extremely slow hole spin relaxation in self-assembled quantum dots
• Phonon Decoherence of a Double Quantum Dot Charge Qubit
• Charge qubit dynamics in a double quantum dot coupled to phonons
• Phonon-induced electron relaxation in weakly-confined single and coupled quantum dots
• Phonon-assisted relaxation and tunneling in self-assembled quantum dot molecules
• Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules

Cited by in corpus (12)

• The role of phonons for exciton and biexciton generation in an optically driven quantum dot
• Electron states in a double quantum dot with broken axial symmetry
• Excitons in quantum dot molecules: Coulomb coupling, spin-orbit effects and phonon-induced line broadening
• Hyperfine interaction for holes in quantum dots: k.p model
• All electrically controlled quantum gates for single heavy hole spin qubits
• Phonon-assisted tunnelling of electrons in a quantum well-quantum dot injection structure
• Vacuum-induced coherence in quantum dot systems
• Decay and persistence of spatial coherence during phonon-assisted relaxation in double quantum dots
• Phonon-assisted carrier tunneling in coupled quantum dot systems with hyperfine-induced spin flip
• Spectral broadening of optical transitions at tunneling resonances in InAs/GaAs coupled quantum dot pairs
• Double quantum dot in a quantum dash: optical properties
• Spin-orbit-induced hole spin relaxation in a quantum dot molecule: the effect of $s$-$p$ coupling