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Updated: Jun 9, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Dissipative quantum geometric phase in the spin-boson system.
Boyu Wang1, Milan Radonjić1,2, Florian Otterpohl1
1I. Institut für Theoretische Physik, Universität Hamburg, Notkestraße 9, 22607 Hamburg, Germany.
The Journal of Chemical Physics
|June 8, 2026
Summary
We studied the geometric phase in the spin-boson model using the non-interacting blip approximation (NIBA). Quantum dissipation suppresses this phase by reducing state purity and localizing dynamics.
Area of Science:
- Quantum mechanics
- Condensed matter physics
Background:
- The spin-boson model describes a two-level system interacting with a bath.
- Geometric phase is a fundamental concept in quantum mechanics.
Purpose of the Study:
- To investigate the evolution of dissipative geometric phase in the spin-boson model.
- To analyze the impact of system-bath coupling and environmental parameters on geometric phase accumulation.
Main Methods:
- Utilized the non-interacting blip approximation (NIBA) for non-unitary time evolution.
- Derived a Bloch-sphere expression for the mixed-state geometric phase.
- Benchmarked NIBA against the time-evolving matrix product operator (TEMPO) technique.
Main Results:
- NIBA accurately reproduces population dynamics and captures geometric phase quantitatively and qualitatively.
- Dissipative trajectory's azimuthal winding characterizes the mixed-state geometric phase.
- Quantum dissipation suppresses geometric phase via thermal noise and static bias.
Conclusions:
- NIBA is a reliable method for studying dissipative quantum systems.
- Geometric phase is sensitive to environmental conditions and system parameters.
- Understanding geometric phase suppression is crucial for quantum information processing.
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