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Quantum to classical transition in an information ratchet.

Josey Stevens1,2, Sebastian Deffner1

  • 1Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA.

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|May 22, 2019
PubMed
Summary

We introduce a new quantum model for information ratchets using a particle in a box and qubits. This model allows for exact solutions and analysis of quantum-classical transitions, aiding in understanding quantum supremacy in these systems.

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Area of Science:

  • Quantum physics
  • Information theory
  • Statistical mechanics

Background:

  • Minimal and autonomous information ratchets are areas of active research.
  • Comparing classical and quantum models of information ratchets is challenging, hindering the quantification of quantum supremacy.
  • Existing models often lack a direct bridge between quantum and classical descriptions.

Purpose of the Study:

  • To bridge the gap between classical and quantum information ratchets.
  • To introduce a novel model with continuous variables for studying information ratchets.
  • To enable a clearer quantification of quantum supremacy in information ratchets.

Main Methods:

  • Development of a model featuring a quantum particle in a box coupled to a stream of qubits.
  • Exact analytical solution of the system's dynamics.
  • Analysis of the quantum-to-classical transition using a natural timescale parameter.

Main Results:

  • The proposed model allows for exact solutions, facilitating direct comparison between quantum and classical behaviors.
  • The quantum-to-classical transition is analyzed quantitatively.
  • A framework is established for exploring quantum advantages in information ratchet systems.

Conclusions:

  • The introduced continuous-variable model provides a tractable platform for studying information ratchets.
  • This work facilitates the quantification of quantum supremacy in information ratchets.
  • The findings pave the way for further research into quantum effects in information processing systems.