Stimulated Phonon Emission in a Driven Double Quantum Dot

Abstract

The compound semiconductor gallium arsenide (GaAs) provides an ultra-clean platform for storing and manipulating quantum information, encoded in the charge or spin states of electrons confined in nanostructures. The absence of inversion symmetry in the zinc-blende crystal structure of GaAs however, results in strong piezoelectric coupling between lattice acoustic phonons and electrons, a potential hindrance for quantum computing architectures that can be charge-sensitive during certain operations. Here we examine phonon generation in a GaAs double dot, configured as a single- or two-electron charge qubit, and driven by the application of microwaves via surface gates. In a process that is a microwave analog of the Raman effect, stimulated phonon emission is shown to produce population inversion of a two-level system and provides spectroscopic signatures of the phononic environment created by the nanoscale device geometry.

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• Achieving High-Fidelity Single-Qubit Gates in a Strongly Driven Charge Qubit with $1/f$ Charge Noise
• Dephasing-assisted Gain and Loss in Mesoscopic Quantum Systems
• Keldysh meets Lindblad: Correlated Gain and Loss in Higher-Order Perturbation Theory
• Double Quantum Dot Floquet Gain Medium
• Nonreciprocal Atomic Scattering: A saturable, quantum Yagi-Uda antenna
• Multi-level interference resonances in strongly-driven three-level systems
• Deterministic Single-Phonon Source Triggered by a Single Photon
• Microwave spectroscopy of a carbon nanotube charge qubit
• Dynamic transition in Landau-Zener-Stückelberg interferometry of dissipative systems: the case of the flux qubit
• Lasing and transport in a multi-level double quantum dot system coupled to a microwave oscillator
• Device Architecture for Coupling Spin Qubits Via an Intermediate Quantum State
• Ultrafast Depopulation of a Quantum Dot by LA-phonon-assisted Stimulated Emission
• Optomechanical coupling in the Anderson-localization regime
• Equivalence between the second order steady state for the spin-Boson model and its quantum mean force Gibbs state
• Full-polaron master equation approach to dynamical steady states of a driven two-level system beyond the weak system-environment coupling