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Enantiomer detection via quantum Otto cycle.

Mohsen Izadyari1, M Tahir Naseem1, Özgür E Müstecaplıoğlu1,2

  • 1Department of Physics, Koç University, 34450 Sarıyer, Istanbul, Türkiye.

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This study proposes a novel method for distinguishing between left- and right-handed enantiomers using thermodynamic processes. By analyzing the work distribution in a quantum Otto cycle, researchers can differentiate these chiral molecules, overcoming limitations of optical detection.

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Area of Science:

  • Quantum thermodynamics
  • Chiral molecular systems
  • Spectroscopy limitations

Background:

  • Enantiomers are chiral molecules with distinct spatial arrangements (left- and right-handed).
  • Optical techniques are standard for enantiomer detection but face challenges due to identical spectra.
  • Distinguishing enantiomers is crucial in various scientific fields.

Purpose of the Study:

  • To investigate the potential of thermodynamic processes for enantiomer detection.
  • To explore the use of a quantum Otto cycle with chiral molecules as the working medium.
  • To develop a method for distinguishing enantiomers that overcomes spectral limitations.

Main Methods:

  • Modeling a chiral molecule as a three-level quantum system with cyclic optical transitions.
  • Coupling each energy transition to an external laser drive.
  • Implementing a quantum Otto cycle with variations in control parameters (overall phase, laser detuning).

Main Results:

  • Left- and right-handed enantiomers exhibit distinct behaviors within the quantum Otto cycle.
  • Enantiomers function as a quantum heat engine and a thermal accelerator based on the overall phase.
  • Both enantiomers act as heat engines when laser detuning is the control parameter.
  • Quantitatively different extracted work and efficiency were observed for each enantiomer.

Conclusions:

  • Enantiomers can be distinguished by analyzing their work distribution in a quantum Otto cycle.
  • Thermodynamic approaches offer a viable alternative to optical methods for enantiomer detection.
  • This work provides a new perspective on utilizing quantum thermodynamics for molecular discrimination.