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Quantum state engineering with circuit electromechanical three-body interactions.

Mehdi Abdi1, Matthias Pernpeintner1,2,3, Rudolf Gross1,2,3

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Summary
This summary is machine-generated.

We developed a hybrid quantum system enabling three-body interactions between photons, phonons, and qubit excitations. This system allows for ground-state cooling and preparation of nonclassical states, advancing quantum manipulation capabilities.

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Area of Science:

  • Quantum mechanics
  • Quantum optics
  • Condensed matter physics

Background:

  • Circuit quantum electrodynamics (cQED) architectures are powerful platforms for studying quantum phenomena.
  • Hybrid quantum systems integrate different quantum components, offering unique interaction possibilities.

Purpose of the Study:

  • To propose and analyze a novel hybrid quantum system with three-body interactions.
  • To explore the potential for quantum state preparation and manipulation within this system.

Main Methods:

  • Utilizing a circuit quantum electrodynamical architecture.
  • Coupling a superconducting microwave resonator to a mechanically oscillating transmon qubit.
  • Investigating three-body interactions involving photons, phonons, and qubit excitations.

Main Results:

  • Demonstrated a three-mode polariton-mechanical mode and nonlinear transmon-mechanical mode interaction in the strong coupling regime.
  • Showcased the feasibility of cooling mechanical motion to its ground state.
  • Achieved preparation of nonclassical states, including mechanical Fock and cat states, and hybrid tripartite entangled states.

Conclusions:

  • The proposed hybrid system offers significant opportunities for manipulating quantum states.
  • The strong coupling regime and unique interactions facilitate advanced quantum control.
  • This platform holds promise for fundamental quantum research and applications in quantum information processing.