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Quantum Statistics and Self-Interference in Extended Colliders
Sai Satyam Samal1, Smitha Vishveshwara2, Yuval Gefen3
1Purdue University, Department of Physics and Astronomy, West Lafayette, Indiana 47907, USA.
Physical Review Letters
|March 6, 2026
Summary
Extended quantum colliders reveal fermion statistics. Researchers developed a new method to accurately measure fermion mutual statistics, overcoming limitations of point-like collider experiments and showing how self-interference can be misinterpreted.
Area of Science:
- Quantum physics
- Condensed matter physics
- Particle statistics
Background:
- Collision experiments are crucial for understanding quantum particle statistics.
- Quantum Hall edge states and quantum point contacts are established platforms for these experiments.
- Existing theoretical models often assume point-like colliders, which differ from experimental setups.
Purpose of the Study:
- To investigate fermionic colliders that are extended (non-point-like).
- To address the limitations of point-like collider approximations in experimental settings.
- To identify a reliable method for probing mutual statistics in extended fermionic systems.
Main Methods:
- Theoretical study of a paradigmatic extended fermionic collider.
- Analysis of particle trajectories and self-interference effects within the extended collider.
- Development and identification of an experimentally accessible current correlator.
Main Results:
- Extended colliders exhibit complex self-interference phenomena.
- Fermionic self-interference can lead to apparent bunching, mimicking classical behavior.
- A specific current correlator is identified that accurately reflects true fermionic statistics.
Conclusions:
- Extended colliders offer a more realistic experimental platform for probing quantum statistics.
- The identified current correlator provides a robust tool to overcome misinterpretations due to self-interference.
- This work extends the understanding of quantum particle statistics in non-ideal collider geometries.
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