Lattice Surgery with a Twist: Simplifying Clifford Gates of Surface Codes

Daniel Litinski; Felix von Oppen

doi:10.22331/q-2018-05-04-62

Lattice Surgery with a Twist: Simplifying Clifford Gates of Surface Codes

Daniel Litinski and Felix von Oppen

Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

Published:	2018-05-04, volume 2, page 62
Eprint:	arXiv:1709.02318v2
Doi:	https://doi.org/10.22331/q-2018-05-04-62
Citation:	Quantum 2, 62 (2018).

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Abstract

We present a planar surface-code-based scheme for fault-tolerant quantum computation which eliminates the time overhead of single-qubit Clifford gates, and implements long-range multi-target CNOT gates with a time overhead that scales only logarithmically with the control-target separation. This is done by replacing hardware operations for single-qubit Clifford gates with a classical tracking protocol. Inter-qubit communication is added via a modified lattice surgery protocol that employs twist defects of the surface code. The long-range multi-target CNOT gates facilitate magic state distillation, which renders our scheme fault-tolerant and universal.

► BibTeX data

@article{Litinski2018latticesurgery,
  doi = {10.22331/q-2018-05-04-62},
  url = {https://doi.org/10.22331/q-2018-05-04-62},
  title = {Lattice {S}urgery with a {T}wist: {S}implifying {C}lifford {G}ates of {S}urface {C}odes},
  author = {Litinski, Daniel and Oppen, Felix von},
  journal = {{Quantum}},
  issn = {2521-327X},
  publisher = {{Verein zur F{\"{o}}rderung des Open Access Publizierens in den Quantenwissenschaften}},
  volume = {2},
  pages = {62},
  month = may,
  year = {2018}
}

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