Entanglement of a laser driven pair of two-level qubits via its phonon environment

Abstract

The entanglement dynamics of a laser-pumped two-level quantum dot pair is investigated in the steady-state. The closely spaced two-level emitters, embedded in a semiconductor substrate, interact with both the environmental vacuum modes of the electromagnetic field reservoir as well as with the lattice vibrational phonon thermostat. We have found that the entanglement among the pair's components is substantially enhanced due to presence of the phonon subsystem. The reason is phonon induced decay among the symmetrical and antisymmetrical two-qubit collective states and, consequently, the population of the latter one. This also means that through thermal phonon bath engineering one can access the subradiant two-particle cooperative state.

15 pages, 2 figures

References in corpus (8)

• Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots
• Photon statistics from coupled quantum dots
• Complete disentanglement by partial pure dephasing
• Collective fluorescence and decoherence of a few nearly identical quantum dots
• Entanglement dynamics and Mollow nonuplets between two coupled quantum dots in a nanowire photonic crystal system
• Quenched dynamics of entangled states in correlated quantum dots
• Vacuum-induced coherence in quantum dot systems
• Fast phonon dynamics of a nanomechanical oscillator due to cooperative effects

Cited by in corpus (3)

• Resonance Energy Transfer and Quantum Entanglement Mediated by Epsilon-Near-Zero and Other Plasmonic Waveguide Systems
• Dephasing-assisted entanglement in a system of strongly coupled qubits
• Entanglement versus cooling in the system of a driven pair of two-level qubits longitudinally coupled with a boson mode field