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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Deterministic quantum teleportation with feed-forward in a solid state system.

L Steffen1, Y Salathe, M Oppliger

  • 1Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland. lsteffen@phys.ethz.ch

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|August 20, 2013
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Summary
This summary is machine-generated.

Researchers demonstrate deterministic quantum teleportation using superconducting circuits. This breakthrough in quantum information science enables high-fidelity state transfer between macroscopic quantum systems, paving the way for quantum communication networks.

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Area of Science:

  • Quantum Information Science
  • Superconducting Circuits
  • Quantum Computing

Background:

  • Macroscopic quantum systems using superconducting circuits are key for quantum information science.
  • Current systems allow basic logic gates, entangled states, and error correction.
  • High-fidelity single-qubit readout is essential for feedback control.

Purpose of the Study:

  • To realize full deterministic quantum teleportation with feed-forward in a chip-based superconducting circuit.
  • To utilize advanced readout techniques and flexible digital electronics for precise control.
  • To explore the potential of crossed quantum bus technology for complex circuit architectures.

Main Methods:

  • Employed a set of two parametric amplifiers for joint and individual qubit single-shot readout.
  • Integrated flexible real-time digital electronics for control.
  • Utilized crossed quantum bus technology for planar circuit architecture with arbitrary connectivity.

Main Results:

  • Achieved full deterministic quantum teleportation with feed-forward in a superconducting circuit.
  • Demonstrated high-fidelity teleportation of quantum states between macroscopic systems (6 mm apart) at a rate of 10^4 s^-1.
  • The process succeeded with near-unit probability for any input state.

Conclusions:

  • The demonstrated quantum teleportation scheme is highly efficient and scalable.
  • Superconducting waveguides offer low transmission loss, enabling longer-distance quantum communication.
  • The feed-forward technique shows promise for quantum error correction applications.