Spin readout of trapped electron qubits

Pai Peng (彭湃), Clemens Matthiesen, and Hartmut Häffner
Phys. Rev. A 95, 012312 – Published 12 January 2017

Abstract

We propose a scheme to read out the spin of a single electron quantum bit in a surface Paul trap using oscillating magnetic-field gradients. The readout sequence is composed of cooling, driving, amplification, and detection of the electron's motion. We study the scheme in the presence of noise and trap anharmonicities at liquid-helium temperatures. An analysis of the four procedures shows short measurement times (25μs) and high fidelities (99.7%) are achievable with realistic experimental parameters. Our scheme performs the function of fluorescence detection in ion trapping schemes, highlighting the potential to build all-electric quantum computers based on trapped electron-spin qubits.

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  • Received 31 October 2016

DOI:https://doi.org/10.1103/PhysRevA.95.012312

©2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Pai Peng (彭湃)1,2, Clemens Matthiesen1, and Hartmut Häffner1,*

  • 1Department of Physics, University of California, Berkeley, California 94720, USA
  • 2School of Physics, Peking University, Beijing 100871, People's Republic of China

  • *hhaeffner@berkeley.edu

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Issue

Vol. 95, Iss. 1 — January 2017

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