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Area of Science:

  • Quantum optics
  • Quantum information science

Background:

  • Quantum gates are fundamental operations in quantum computing.
  • Gaussian states are well-understood, but non-Gaussian states offer unique quantum properties.
  • Hybrid quantum protocols combine discrete and continuous variable approaches.

Purpose of the Study:

  • To implement a quantum gate for non-Gaussian states.
  • To demonstrate a two-way conversion between particle-like and wave-like quantum states.
  • To advance the development of hybrid quantum information processing.

Main Methods:

  • Implementing a deterministic and reversible squeezing operation.
  • Applying the squeezing gate to non-Gaussian input states.
  • Verifying the preservation of Wigner function negativities.

Main Results:

  • Successfully applied a squeezing operation to non-Gaussian states.
  • Demonstrated a two-way conversion between single-photon states and superpositions of coherent states.
  • Confirmed the preservation of Wigner function negativities, indicating high fidelity.

Conclusions:

  • The developed squeezing gate is a reliable tool for manipulating non-Gaussian states.
  • This work is a crucial step towards integrating discrete and continuous variable quantum information processing.
  • Enables new possibilities for quantum technologies leveraging non-Gaussian quantum resources.