Creation of entangled states in coupled quantum dots via adiabatic rapid passage

Abstract

Quantum state preparation through external control is fundamental to established methods in quantum information processing and in studies of dynamics. In this respect, excitons in semiconductor quantum dots (QDs) are of particular interest since their coupling to light allows them to be driven into a specified state using the coherent interaction with a tuned optical field such as an external laser pulse. We propose a protocol, based on adiabatic rapid passage, for the creation of entangled states in an ensemble of pairwise coupled two-level systems, such as an ensemble of QD molecules. We show by quantitative analysis using realistic parameters for semiconductor QDs that this method is feasible where other approaches are unavailable. Furthermore, this scheme can be generically transferred to some other physical systems including circuit QED, nuclear and electron spins in solid-state environments, and photonic coupled cavities.

10 pages, 2 figures. Added reference, minor changes. Discussion, results and conclusions unchanged

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Cited by in corpus (10)

• Lindblad theory of dynamical decoherence of quantum-dot excitons
• Efficient Generation of the Triplet Bell State Between Coupled Spins Using Transitionless Quantum Driving and Optimal Control
• Electron states in a double quantum dot with broken axial symmetry
• Counter-diabatic driving for fast spin control in a two-electron double quantum dot
• Quenched dynamics of entangled states in correlated quantum dots
• Generation of entanglement in systems of intercoupled qubits
• Steady-state entanglement generation for non-degenerate qubits
• Fast generation of entanglement between coupled spins using optimization and deep learning methods
• Compact Chirped Fiber Bragg Gratings for Single-Photon Generation from Quantum Dots
• Time evolution of an entangled initial state in coupled quantum dots with Coulomb correlations