Quantum Gates for Propagating Microwave Photons

Research output: Contribution to journalArticleScientific

Researchers

Research units

  • National Institute of Standards and Technology
  • University of Michigan, Ann Arbor

Abstract

We report a generic scheme to implement transmission-type quantum gates for propagating microwave photons, based on a sequence of lumped-element components on transmission lines. By choosing three equidistant superconducting quantum interference devices (SQUIDs) as the components on a single transmission line, we experimentally implement a magnetic-flux-tunable phase shifter and demonstrate that it produces a broad range of phase shifts and full transmission within the experimental uncertainty. Together with previously demonstrated beam splitters, these phase shifters can be utilized to implement arbitrary single-qubit gates. Furthermore, we theoretically show that replacing the SQUIDs by superconducting qubits, the phase shifter can be made strongly nonlinear, thus introducing deterministic photon--photon interactions. These results critically complement the previous demonstrations of on-demand single-photon sources and detectors, and hence pave the way for an all-microwave quantum computer based on propagating photons.

Details

Original languageEnglish
JournalarXiv.org
Early online date7 Mar 2017
Publication statusE-pub ahead of print - 7 Mar 2017
MoE publication typeNot Eligible

ID: 11128638