Data for: "Deterministic amplification of Schrödinger cat states in circuit quantum electrodynamics"

  • Daniel Oi (Creator)
  • Eran Ginossar (Creator)
  • Jaewoo Joo (Creator)
  • Matthew Elliott (Creator)
  • Timothy P. Spiller (Creator)



Perfect deterministic amplification of arbitrary quantum states is prohibited by quantum mechanics, but determinism can be achieved by compromising between fidelity and amplification power. We propose a dynamical scheme for deterministically amplifying photonic Schrödinger cat states, which show great promise as a tool for quantum information processing. Our protocol is designed for strongly coupled circuit quantum electrodynamics and utilizes artificial atomic states and external microwave controls to engineer a set of optimal state transfers and achieve high fidelity amplification. We compare analytical results with full simulations of the open, driven Jaynes-Cummings model, using realistic device parameters for state of the art superconducting circuits. Amplification with a fidelity of 0.9 can be achieved for sizable cat states in the presence of cavity and atomic-level decoherence. This tool could be applied to practical continuous-variable information processing for the purification and stabilization of cat states in the presence of photon losses. (Publication abstract)

Data held at Surrey Research Insight (SRI) Login required
Date made available13 Oct 2017
Date of data production19 Jan 2016

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