Entanglement creation in a quantum dot-nanocavity system

Abstract

We explore the possibility to entangle an excitonic two-level system in a semiconductor quantum dot (QD) with a cavity defined on a photonic crystal by sweeping the cavity frequency across its resonance with the exciton transition. The dynamic cavity detuning is established by a radio frequency surface acoustic wave (SAW). It induces Landau-Zener (LZ) transitions between the excitonic and the photonic degrees of freedom and thereby creates a superposition state. We optimize this scheme by using tailored Fourier-synthesized SAW pulses with up to five harmonics. The theoretical study is performed with a master equation approach for present state-of-the-art setups. Assuming experimentally demonstrated system parameters, we demonstrate that the composed pulses increase both the maximum entanglement and its persistence. The latter is only limited by the dominant dephasing mechanism; i.e., the photon loss from the cavity.

7 pages, 4 figures

References in corpus (8)

• Quantum nature of a strongly-coupled single quantum dot-cavity system
• Dynamic modulation of photonic crystal nanocavities using gigahertz acoustic phonons
• Manipulation of the Spontaneous Emission Dynamics of Quantum Dots in 2D Photonic Crystals
• Recent advances in exciton based quantum information processing in quantum dot nanostructures
• Generalized Gibbs state with modified Redfield solution: Exact agreement up to second order
• Nuclear State Preparation via Landau-Zener-Stueckelberg transitions in Double Quantum Dots
• Quantum state preparation in circuit QED via Landau-Zener tunneling
• Entanglement creation in circuit QED via Landau-Zener sweeps

Cited by in corpus (24)

• Nonadiabatic Landau-Zener-Stückelberg-Majorana transitions, dynamics, and interference
• Sub-optical wavelength acoustic wave modulation of integrated photonic resonators at microwave frequencies
• Fourier synthesis of radio frequency nanomechanical pulses with different shapes
• The role of phonons for exciton and biexciton generation in an optically driven quantum dot
• Dynamic acousto-mechanical control of a strongly coupled photonic molecule
• Nonlinear quantum dot optomechanics
• Surface acoustic wave regulated single photon emission from a coupled quantum dot-nanocavity system
• Complete Coherent Control of a Quantum Dot Strongly Coupled to a Nanocavity
• Multiharmonic frequency-chirped transducers for surface-acoustic-wave optomechanics
• Independent dynamic acousto-mechanical and electrostatic control of individual quantum dots in a LiNbO${}_3$-GaAs hybrid
• Multi-harmonic Quantum Dot Optomechanics in fused LiNbO${}_3$-(Al)GaAs hybrids
• Quantum dot optomechanics in suspended nanophononic strings
• Qubit interference at avoided crossings: The role of driving shape and bath coupling
• Energy transport and coherence properties of acoustic phonons generated by optical excitation of a quantum dot
• A Hybrid (Al)GaAs-LiNbO${}_3$ Surface Acoustic Wave Resonator for Cavity Quantum Dot Optomechanics
• Robust fermionic-mode entanglement of a nanoelectronic system in non-Markovian environments
• A frequency-tunable nanomembrane mechanical oscillator with embedded quantum dots
• Generation and stabilization of Bell states via repeated projective measurements on a driven ancilla qubit
• SU(3) Landau-Zener interferometry with a transverse periodic drive
• Full spatiotemporal control of laser-excited periodic surface deformations
• Decoherence of an entangled state of a strongly-correlated double quantum dot structure through tunneling processes
• Entanglement balance of quantum $(e,2e)$ scattering processes
• Topical review on acousto-optical Floquet engineering of single-photon emitters
• Indirect strong coupling regime between a quantum dot and a nanocavity mediated by a mechanical resonator