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Updated: Jun 30, 2025
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
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Signatures of quantum phases in a dissipative system.
Rohan Joshi1,2, Saikat Mondal1, Souvik Bandyopadhyay1,3
1Indian Institute of Technology Kanpur, Kalyanpur, Uttar Pradesh 208016, India.
Summary
Investigating dissipative quantum systems, this study reveals that steady-state phase diagrams retain signatures of critical physics. Early-time fidelity and thermal properties are key to understanding these phenomena in quantum many-body systems.
Area of Science:
- Condensed Matter Physics
- Quantum Many-Body Systems
- Quantum Information
Background:
- Lindbladian formalism is crucial for understanding non-equilibrium steady states in open quantum systems.
- Dissipative systems, acting as both sources and sinks of particles, present unique challenges in quantum many-body physics.
- Characterizing phases and transitions in such systems requires novel analytical approaches.
Purpose of the Study:
- To investigate the steady-state phase diagram of a dissipative one-dimensional Kitaev model.
- To explore the role of particle baths with varying coupling rates on fermionic and superconducting phases.
- To analyze entanglement content and the approach to steady states from different initial conditions.
Main Methods:
- Utilized Lindbladian formalism for dissipative and open quantum many-body systems.
- Studied a one-dimensional Kitaev model with a particle-exchanging bath.
- Analyzed steady-state properties, entanglement, and fidelity from varying initial states.
Main Results:
- The steady-state phase diagram retains signatures of ground-state critical physics.
- Early-time fidelity serves as a marker for certain phase transitions.
- Late-time critical signatures depend on the thermal nature of the steady state, hinting at quantum-classical connections.
Conclusions:
- Dissipative quantum many-body systems exhibit rich phase diagrams with connections to critical phenomena.
- The study establishes a link between quantum observables, classical magnetism, and thermalization in steady states.
- Uncovers novel connections between dissipative dynamics, quantum critical phenomena, and classical spin thermalization.
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