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Updated: May 18, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Nonequilibrium discrete nonlinear Schrödinger equation.

Stefano Iubini1, Stefano Lepri, Antonio Politi

  • 1Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy. stefano.lepri@isc.cnr.it

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 26, 2012
PubMed
Summary
This summary is machine-generated.

This study investigates nonequilibrium steady states in a model for particle transport. Results show normal transport and potential for unusual density/temperature profiles due to state-dependent coefficients.

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Area of Science:

  • Condensed Matter Physics
  • Statistical Mechanics
  • Quantum Optics

Background:

  • The one-dimensional discrete nonlinear Schrödinger equation models bosonic particle transport in systems like layered media or optical traps.
  • It exhibits coupled transport phenomena due to conserved energy and particle number, aligning with linear irreversible thermodynamics.

Purpose of the Study:

  • To analyze nonequilibrium steady states in this minimal model.
  • To investigate the nature of transport and associated coefficients under imposed temperature and chemical potential gradients.

Main Methods:

  • Implementation of Monte Carlo thermostats to control boundary conditions.
  • Analysis of Onsager coefficients and transport properties in the thermodynamic limit.

Main Results:

  • Onsager coefficients are finite, indicating normal transport.
  • The Seebeck coefficient can be positive or negative.
  • Nonmonotonic density and temperature profiles emerge for large thermostat parameter differences.

Conclusions:

  • The model exhibits normal transport behavior.
  • State-dependent Onsager coefficients lead to complex profile behaviors.
  • This system serves as a valuable minimal model for understanding coupled transport in driven quantum systems.