Implementation of one-qubit quantum gates with individual addressing of two rubidium atoms in two optical dipole traps

I. I. Beterov, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, N. V. Al'yanova, K. Y. Mityanin, I. I. Ryabtsev, A. M. Faruk

Research output: Contribution to journalArticlepeer-review

Abstract

We report the results of experiments on implementing individually addressable one-qubit quantum gates on a microwave transition with two 87Rb atoms in two optical dipole traps. Addressing is carried out using additional focused laser light, which results in a differential light shift of the microwave transition frequency. In the absence of addressing in each of the atoms, Rabi oscillations are obtained on the microwave clock transition 5S1/2 (F = 2, mF = 0) ® 5S1/2(F = 1, mF = 0) between two working levels of qubits with a frequency of up to 5.1 kHz, a contrast up to 98 %, and a coherence time up to 4 ms. When addressing is turned on, the probability of a microwave transition in the addressed atom is suppressed to an average value of less than 5 %. The Rabi oscillations remaining in the other atom have the same contrast and correspond to the implementation of individually addressable basic one-qubit quantum operations (Hadamard gate and NOT gate) from different initial states of a qubit with an average fidelity of 92% ± 3 %. After renormalising this fidelity to the error in the preparation and measurement of quantum states of qubits, an estimate of 97% ± 3% is obtained for the fidelity of individual qubit rotations.

Original languageEnglish
Pages (from-to)464-472
Number of pages9
JournalQuantum Electronics
Volume51
Issue number6
DOIs
Publication statusPublished - Jun 2021

Keywords

  • One-qubit gates
  • Optical traps
  • Single atoms

OECD FOS+WOS

  • 2.02 ELECTRICAL ENG, ELECTRONIC ENG
  • 2.05 MATERIALS ENGINEERING
  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY
  • 1.03.UB PHYSICS, APPLIED

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