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This summary is machine-generated.

We present a novel method using electrons to cool thermal photonic states in cavities. This quantum entanglement technique reduces thermal photons, offering a general framework for quantum oscillator cooling.

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Condensed matter physics

Background:

  • Thermal photonic states in cavities are prevalent in quantum systems.
  • Cooling these states is crucial for enhancing quantum control and reducing noise.
  • Existing cooling methods have limitations in applicability or efficiency.

Purpose of the Study:

  • To propose and theoretically demonstrate a new method for cooling thermal photonic states in optical cavities.
  • To leverage electron-cavity interactions and quantum entanglement for state preparation.
  • To establish a generalizable framework for quantum oscillator cooling.

Main Methods:

  • Utilizing a coherent splitting of electrons into two paths.
  • Entangling one electron path with the cavity's photonic state.
  • Applying a sequence of entanglement interactions for cooling.
  • Employing a "which-path" information-based approach.

Main Results:

  • Achieved cooling of the thermal photonic state within the cavity.
  • Demonstrated a twofold reduction in the thermal photon number.
  • Obtained a 25% postselection probability for the cooling process.
  • Showcased the generalizability of the method to other qubit-oscillator systems.

Conclusions:

  • The proposed electron-based method offers an effective way to cool cavity thermal photonic states.
  • This technique provides a versatile quantum entanglement strategy applicable to various quantum systems.
  • The "which-path" approach establishes a new paradigm for quantum oscillator cooling.