Coherent control of the dynamics of single quantum-dot exciton qubit in a cavity

Abstract

In this work we demonstrate theoretically how to use external laser field to control the population inversion of a single quantum dot exciton qubit in a nanocavity. We consider the Jaynes-Cummings model to describe the system, and the incoherent losses were take into account by using Lindblad operators. We have demonstrated how to prepare the initial state in a superposition of the exciton in the ground state and the cavity in a coherent state. The effects of exciton-cavity detuning, the laser-cavity detunings, the pulse area and losses over the qubit dynamics are analyzed. We also show how to use a continuous laser pumping in resonance with the cavity mode to sustain a coherent state inside the cavity, providing some protection to the qubit against cavity loss.

arXiv commentAccepted for publication in Physical Review B

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Cited by in corpus (5)

• Time-dependent nonlinear Jaynes-Cummings dynamics of a trapped ion
• Optimal control of an inhomogeneous spin ensemble coupled to a cavity
• Antiferromagnetic ordering and excitonic pairing in the AA-stacked bilayer graphene
• Autler-Townes Doublet observation via a Cooper-Pair Beam Splitter
• Control Protocol for Dynamic Synthesis of Qubit and Qudit Gates Using Photonic Pulses and Magnetic Fields