Robust two-qubit gates for exchange-coupled qubits

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • F. Setiawan
  • Hoi-Yin Hui
  • J. P. Kestner
  • Xin Wang
  • S. Das Sarma

Detail(s)

Original languageEnglish
Article number85314
Journal / PublicationPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number8
Publication statusPublished - 28 Feb 2014
Externally publishedYes

Abstract

We present composite pulse sequences that perform fault-tolerant two-qubit gate operations on exchange-only quantum-dot spin qubits in various experimentally relevant geometries. We show how to perform dynamically corrected two-qubit gates in exchange-only systems with the leading hyperfine error term canceled. These pulse sequences are constructed to conform to the realistic experimental constraint of strictly non-negative couplings. We establish that our proposed pulse sequences lead to several orders of magnitude improvement in the gate fidelity compared with their uncorrected counterparts. Together with single-qubit dynamically corrected gates, our results enable noise-resistant universal quantum operations with exchange-only qubits. © 2014 American Physical Society.

Citation Format(s)

Robust two-qubit gates for exchange-coupled qubits. / Setiawan, F.; Hui, Hoi-Yin; Kestner, J. P.; Wang, Xin; Sarma, S. Das.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 89, No. 8, 85314, 28.02.2014.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review