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Nonlinear coherent heat machines.

Tomáš Opatrný1, Šimon Bräuer1, Abraham G Kofman2

  • 1Department of Optics, Faculty of Science, Palacký University, 17, Listopadu 50, 77146 Olomouc, Czech Republic.

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Summary
This summary is machine-generated.

We developed novel nonlinear, coherent heat machines. These systems transform thermal energy into nonthermal quantum outputs with reduced uncertainty, useful for quantum sensing and communications.

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Area of Science:

  • Quantum thermodynamics
  • Nonlinear quantum optics
  • Quantum information science

Background:

  • Classical thermodynamics often assumes macroscopic systems, limiting its application to quantum regimes.
  • Quantum systems exhibit unique behaviors like superposition and entanglement, crucial for advanced technologies.
  • Controlling quantum fluctuations is key for precision measurements and secure communication.

Purpose of the Study:

  • To propose novel heat machines operating in the quantum domain.
  • To explore the transformation of thermal states into non-Gaussian quantum states.
  • To enable the extraction of work from quantum systems with controlled fluctuations.

Main Methods:

  • Designing closed, few-mode nonlinear systems utilizing Kerr interactions.
  • Employing quantum optomechanical cavities with Josephson qubits.
  • Utilizing cold atomic gases with Rydberg atom polaritons.

Main Results:

  • Demonstrated transformation of thermal input into nonthermal (non-Gaussian) quantum output.
  • Achieved controlled quantum fluctuations in the output.
  • Showcased the capacity to deliver work in a selected mode.
  • Exhibited reduced phase and amplitude uncertainty in the output.

Conclusions:

  • Proposed heat machines offer a pathway to bridge quantum and classical thermodynamics.
  • The generated nonthermal states hold potential for enhanced quantum sensing and communication.
  • Experimental realization is feasible in current quantum technology platforms.