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Updated: Mar 29, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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When Does a Spin Flip? Arrival Time Distributions and Information Propagation in Discrete Quantum Systems
1EDHEC Quantum Institute, EDHEC Business School, 06200 Nice, France.
Entropy (Basel, Switzerland)
|March 28, 2026
Summary
This study explores three distinct time of arrival (TOA) distribution methods for quantum systems. These approaches represent different physical concepts, not competing theories, with applications in quantum information science.
Area of Science:
- Quantum mechanics
- Quantum information science
Background:
- Time of arrival (TOA) distributions are crucial for understanding quantum dynamics.
- Existing TOA approaches lack a unified interpretation.
Purpose of the Study:
- To analyze and differentiate three distinct TOA distribution approaches in quantum systems.
- To clarify the physical interpretations of different TOA notions.
- To explore applications in quantum information science.
Main Methods:
- Utilized a spin-1/2 particle in a magnetic field as a model system.
- Analyzed information propagation TOA distributions in XX spin chains.
Main Results:
- Demonstrated that three TOA distributions represent fundamentally different physical concepts.
- Showed the relevance of each TOA notion is context-dependent.
- Identified potential applications in quantum information science.
Conclusions:
- The three TOA distributions are not competing predictions but distinct physical notions.
- Context is key to selecting the appropriate TOA distribution.
- Findings pave the way for advancements in quantum information processing.
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