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  • Letter

Deutsch, Toffoli, and cnot Gates via Rydberg Blockade of Neutral Atoms

Xiao-Feng Shi
Phys. Rev. Applied 9, 051001 – Published 22 May 2018
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Abstract

Universal quantum gates and quantum error correction (QEC) lie at the heart of quantum-information science. Large-scale quantum computing depends on a universal set of quantum gates, in which some gates may be easily carried out, while others are restricted to certain physical systems. There is a unique three-qubit quantum gate called the Deutsch gate [D(θ)], from which a circuit can be constructed so that any feasible quantum computing is attainable. We design an easily realizable D(θ) by using the Rydberg blockade of neutral atoms, where θ can be tuned to any value in [0,π] by adjusting the strengths of external control fields. Using similar protocols, we further show that both the Toffoli and controlled-not gates can be achieved with only three laser pulses. The Toffoli gate, being universal for classical reversible computing, is also useful for QEC, which plays an important role in quantum communication and fault-tolerant quantum computation. The possibility and speed of realizing these gates shed light on the study of quantum information with neutral atoms.

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  • Received 5 October 2017
  • Revised 19 February 2018

DOI:https://doi.org/10.1103/PhysRevApplied.9.051001

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Xiao-Feng Shi

  • School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China

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Vol. 9, Iss. 5 — May 2018

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