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Thermodynamic potentials are state functions that are extremely useful in analyzing a thermodynamic system. They have dimensions of energy. The four important thermodynamic potentials are internal energy, enthalpy, Helmholtz free energy, and Gibbs free energy. These thermodynamic potentials can be expressed using two of the following variables: pressure, volume, temperature, and entropy. These two variables are expressed as the rate of change of the thermodynamic potential with respect to other...
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A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
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Probing coherent quantum thermodynamics using a trapped ion.

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Researchers experimentally measured a quantum correction to the work fluctuation-dissipation relation using a trapped ion. This quantum friction effect, observed in quantum thermodynamics, goes beyond classical predictions.

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Area of Science:

  • Quantum thermodynamics
  • Quantum information science
  • Experimental physics

Background:

  • Quantum thermodynamics seeks to understand thermodynamic laws in quantum systems, where coherence and entanglement are crucial.
  • Developing quantum thermal machines demonstrating the pivotal role of quantum effects has been challenging.
  • Classical work fluctuation-dissipation relations lack quantum corrections relevant to deep quantum regimes.

Purpose of the Study:

  • To experimentally measure and benchmark a genuine quantum correction to the classical work fluctuation-dissipation relation.
  • To investigate the impact of quantum friction on thermodynamic properties in a quantum system.
  • To demonstrate the utility of stochastic quantum thermodynamics for identifying quantum signatures.

Main Methods:

  • Utilized a trapped ion system for experimental control and measurement.
  • Employed laser-induced coherent Hamiltonian rotations to manipulate the quantum state.
  • Performed precise energy measurements to quantify thermodynamic work fluctuations.

Main Results:

  • Successfully measured and benchmarked a quantum correction induced by quantum friction.
  • Demonstrated that quantum friction modifies the classical work fluctuation-dissipation relation.
  • Validated the capability of stochastic quantum thermodynamics to distinguish quantum signatures.

Conclusions:

  • Quantum friction introduces a measurable correction to classical thermodynamic relations in the quantum regime.
  • Experimental techniques can unambiguously identify genuine quantum coherent signatures, even with SPAM errors.
  • The findings extend beyond established theoretical predictions, opening new avenues for quantum thermodynamics research.