From Random Telegraph to Gaussian Stochastic Noises: Decoherence and Spectral Diffusion in a Semiconductor Quantum Dot
نویسندگان
چکیده
1 Laboratoire Pierre Aigrain, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 5, France 2 CNRS UMR8551, Université Pierre et Marie Curie, 24 rue Lhomond, 75005 Paris, France 3 Laboratoire de Physico-Chimie des Matériaux Luminescents, Université Lyon 1, Université de Lyon, Campus de la Doua, 69622 Villeurbanne, France 4 Université Montpellier 2, CC 074, 34095 Montpellier Cedex 5, France
منابع مشابه
Spectral diffusion dephasing and motional narrowing in single semiconductor quantum dots
In this review, we address the extrinsic dephasing mechanism of spectral diffusion that dominates the decoherence in semiconductor quantum dots at cryogenic temperature. We discuss the limits of random telegraph and Gaussian stochastic noises, and we describe the general effect of motional narrowing in the context of spectral noise. We emphasize the unconventional phenomenology of motional narr...
متن کاملVoltage-controlled motional narrowing in a semiconductor quantum dot
We demonstrate the control with a dc-voltage of the environment-induced decoherence in a semiconductor quantum dot embedded in a gated field-effect device. The electrical control of the spectral diffusion dynamics governing the quantum dot decoherence induces various effects, and in particular a narrowing of the quantum dot emission spectrum on increasing the electric field applied to the struc...
متن کاملDecoherence and Dynamical Decoupling in Solid-state Spin Qubits
Title of dissertation: DECOHERENCE AND DYNAMICAL DECOUPLING IN SOLID-STATE SPIN QUBITS Wayne Martin Witzel Doctor of Philosophy, 2007 Dissertation directed by: Professor Sankar Das Sarma Department of Physics This dissertation is a study of the decoherence of a solid-state spin qubit, either that of a localized electron spin or a donor nucleus, caused by a nuclear spin bath relevant to semicond...
متن کاملDephasing processes in a single semiconductor quantum dot
We discuss the decoherence dynamics in a single semiconductor quantum dot and analyze two dephasing mechanisms. In the first part of the review, we examine the intrinsic source of dephasing provided by the coupling to acoustic phonons. We show that the non-perturbative reaction of the lattice to the interband optical transition results in a composite optical spectrum with a central zero-phonon ...
متن کاملDecoherence effects on quantum Fisher information of multi-qubit W states
Quantum fisher information of a parameter characterizing the sensitivity of a state with respect to parameter changes. In this paper, we study the quantum fisher information of the W state for four, five, six and seven particles in decoherence channels, such as amplitude damping, phase damping and depolarizing channel. Using Krauss operators for decoherence channels components, we investigate t...
متن کامل