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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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Characterizing Electron Transport through Living Biofilms
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Fermionic thermocoherent state: Efficiency of electron transport.

Anirban Karmakar1, Gautam Gangopadhyay1

  • 1S.N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata-700098, India.

Physical Review. E
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Summary

Researchers introduced the fermionic thermocoherent state, a new quantum state for fermions. This state, when applied to electronic conduction, modifies the Landauer conductance formula, accounting for source coherence in electron transport.

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Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Quantum information

Background:

  • The fermionic coherent state, based on Cahill and Glauber's work, provides a foundation for quantum state analysis.
  • Understanding thermal and coherent properties in fermionic systems is crucial for quantum technologies.

Purpose of the Study:

  • To introduce and characterize the fermionic thermocoherent state.
  • To explore its relationship with other fermionic quantum states.
  • To investigate its implications for electronic transport and noise suppression.

Main Methods:

  • Utilizing the quasiprobability distribution to define the fermionic thermocoherent state.
  • Analyzing the state's properties in thermal and coherent limits.
  • Investigating its realization as a displaced thermal state of fermions.
  • Exploring connections to fermionic displaced number and fermion-added coherent states.

Main Results:

  • The fermionic thermocoherent state exhibits properties analogous to bosonic systems.
  • This state can be realized as a displaced thermal state of fermions.
  • The study reveals noise suppression due to the thermocoherent nature of the source.
  • A modified Landauer conductance formula is proposed, incorporating source coherence.

Conclusions:

  • The fermionic thermocoherent state offers a novel framework for describing quantum fermionic systems.
  • Its application in electronic conduction highlights the significance of source coherence in transport phenomena.
  • This research provides insights into quantum transport and noise reduction in fermionic systems.