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Quantum Machines: Measurement and Control of Engineered Quantum SystemsLecture Notes of the Les Houches Summer School: Volume 96, July 2011$
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Michel Devoret, Benjamin Huard, Robert Schoelkopf, and Leticia F. Cugliandolo

Print publication date: 2014

Print ISBN-13: 9780199681181

Published to Oxford Scholarship Online: September 2014

DOI: 10.1093/acprof:oso/9780199681181.001.0001

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Two-electron spin qubits in GaAs: control and dephasing due to nuclear spins

Two-electron spin qubits in GaAs: control and dephasing due to nuclear spins

Chapter:
(p.369) 10 Two-electron spin qubits in GaAs: control and dephasing due to nuclear spins
Source:
Quantum Machines: Measurement and Control of Engineered Quantum Systems
Author(s):

A. Yacoby

H. Bluhm

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199681181.003.0010

This chapter presents a review of quantum dots in two-dimensional electron gases. The spin qubits realized in these systems are strongly affected by the surrounding nuclear spins. An elegant demonstration is given that the nuclear spin bath is not as irreversible as one might think. Echo sequences can efficiently undo the dephasing of the qubitbrought about by the motion of nuclear spins.

Keywords:   quantum dots, two-dimensional electron gas, spin qubit, dephasing, nuclear spin

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