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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Quantum thermodynamics with local control.

J Lekscha1,2,3, H Wilming1, J Eisert1

  • 1Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, 14195 Berlin, Germany.

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|March 18, 2018
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Summary
This summary is machine-generated.

Local control over thermal machines limits their efficiency, especially in many-body systems. Some configurations, like the antiferromagnetic Ising model, can achieve Carnot efficiency with strong interactions.

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Area of Science:

  • Thermodynamics
  • Quantum Many-Body Systems
  • Quantum Control

Background:

  • Investigating limitations in thermodynamic tasks due to restricted local control.
  • Focusing on devices with interacting many-body systems.

Purpose of the Study:

  • Study work extraction protocols using many-body systems as working media.
  • Analyze performance bounds under restricted thermodynamic operations.

Main Methods:

  • Employing local control by tuning on-site Hamiltonian terms.
  • Case study: one-dimensional Ising model in the thermodynamic limit.

Main Results:

  • Restricted control generally prevents reaching Carnot efficiency or finite work per particle.
  • Ferromagnetic Ising model becomes ineffective for work extraction with strong interactions.
  • Antiferromagnetic Ising model performance improves with interaction strength, reaching Carnot efficiency.

Conclusions:

  • Local control imposes fundamental limitations on thermodynamic tasks.
  • Findings offer a more realistic model for current experimental scenarios.
  • Connects quantum control studies with thermodynamics.