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Engineered dissipation using symmetry-protected superconducting circuits

Objective

Dissipation is fundamental to physical systems. In quantum mechanics, this manifests itself as energy decay and dephasing also known as quantum decoherence. In the field of quantum computing, decoherence is often relegated as a non-ideality of the physical system. However, dissipation and decoherence are a necessary for quantum information processing; allowing measurement, state preparation, and quantum error correction. I propose to explore engineered multi-photon dissipation processes using superconducting circuits. By extending the well-established ‘transmon qubit’ platform, this work will investigate the use of symmetry to prevent single-photon decay while allowing two-photon and four-photon decay events. Such a mechanism has immediate applications akin to trapped-ion technology for qubit state reset and resonance fluorescence readout. In addition, possible multi-mode dissipative processes provide a rich physics to explore more complex quantum phenomena in larger systems. This includes entanglement stabilization and the generation of decoherence-free subspaces.

Field of science

  • /engineering and technology/electrical engineering, electronic engineering, information engineering/electronic engineering/computer hardware/quantum computer
  • /natural sciences/physical sciences/quantum physics
  • /natural sciences/computer and information sciences/data science/data processing
  • /natural sciences/physical sciences/electromagnetism and electronics/electrical conductivity/superconductor

Call for proposal

H2020-MSCA-IF-2018
See other projects for this call

Funding Scheme

MSCA-IF-EF-ST - Standard EF

Coordinator

THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD
Address
Wellington Square University Offices
OX1 2JD Oxford
United Kingdom
Activity type
Higher or Secondary Education Establishments
EU contribution
€ 224 933,76