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Updated: Mar 25, 2026
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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
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Quantum phase transition in a coupled two-level system embedded in anisotropic three-dimensional photonic crystals
H Z Shen1,2,3, X Q Shao1,2, G C Wang1,2
1Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China.
Physical Review. E
|February 13, 2016
Summary
This study explores quantum phase transitions (QPTs) in coupled spin-boson models, revealing two distinct QPTs. Findings suggest controlling decoherence by engineering reservoir spectra for quantum devices.
Area of Science:
- Quantum Many-Body Physics
- Quantum Optics
- Condensed Matter Physics
Background:
- Quantum phase transitions (QPTs) are critical phenomena in quantum many-body systems.
- The spin-boson model is a standard framework for studying QPTs, but coupled systems remain less explored.
- Photonic crystals offer a platform for engineering quantum system dynamics.
Purpose of the Study:
- Investigate quantum phase transitions in coupled spin-boson models.
- Analyze the behavior of coupled two-level atoms in anisotropic photonic crystals.
- Identify critical equations and phase diagrams for these systems.
Main Methods:
- Exact derivation of system dynamics using the Laplace transform method.
- Analysis of ground state properties.
- Determination of phase diagrams via two exact critical equations.
Main Results:
- Identified two distinct quantum phase transitions (QPTs).
- Characterized transitions between phases with and without bound states.
- Described transitions in bound state eigenvalues (one to two eigenvalues).
Conclusions:
- The coupled spin-boson model exhibits rich QPT phenomena.
- Engineering reservoir spectra can mitigate decoherence and form bound states.
- Results offer pathways for advancing quantum devices and quantum statistics.
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