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Area of Science:

  • Quantum physics
  • Quantum information science

Background:

  • Generating multi-partite quantum entangled states is crucial for quantum technologies.
  • Dissipative environments typically degrade quantum states, posing a challenge.

Purpose of the Study:

  • To develop a method for generating programmable multi-partite entangled states using controlled dissipation.
  • To overcome stringent initial state preparation requirements.

Main Methods:

  • Utilized controlled dissipation as a resource.
  • Employed dissipative internal spins to couple with vibrational modes of trapped ions.
  • Experimentally generated multimode squeezed states from initial thermal states.

Main Results:

  • Successfully generated entangled states across two, three, and five vibrational modes.
  • Confirmed genuine multipartite entanglement using fidelity estimates, two-body correlations, and the van Loock-Furusawa inseparability criteria.
  • Demonstrated programmability in generating entangled states.

Conclusions:

  • Controlled dissipation can be a resource for generating entangled states.
  • This approach provides a generic pathway to create entangled nonclassical states in quantum harmonic oscillators.
  • The method is applicable to continuous-variable quantum information processing.