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Protocol for Generating Optical Gottesman-Kitaev-Preskill States with Cavity QED.

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  • 1Center for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of Denmark, Building 307, Fysikvej, 2800 Kongens Lyngby, Denmark.

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Researchers propose a new method for creating Gottesman-Kitaev-Preskill (GKP) states, essential for quantum computing. This technique, using cavity quantum electrodynamics (QED), could enable fault-tolerant quantum computations in optical systems.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Computing

Background:

  • Gottesman-Kitaev-Preskill (GKP) states are crucial for fault-tolerant quantum computing.
  • Realizing GKP states in optical systems is a significant experimental challenge.

Purpose of the Study:

  • To propose a practical method for preparing GKP states in the optical domain.
  • To enhance the feasibility of GKP state generation by combining with existing protocols.

Main Methods:

  • Utilizing a cavity quantum electrodynamics (QED) system for GKP state preparation.
  • Integrating the proposed protocol with the Vasconcelos et al. breeding protocol.
  • Exploring platforms such as trapped atoms, quantum dots, and diamond color centers.

Main Results:

  • Demonstrated a viable pathway for generating GKP states using cavity QED.
  • Showcased that combining protocols relaxes demands on QED system quality.
  • Projected the achievement of over 10 dB squeezing in GKP states.

Conclusions:

  • The proposed method offers a promising route to experimentally realize GKP states.
  • This work advances the development of fault-tolerant continuous-variable quantum computing.
  • Near-future experiments can achieve significant squeezing levels for GKP states.