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Parity-Induced Thermalization Gap in Disordered Ring Lattices.

Yao Wang1,2,3, Jun Gao1,2,3, Xiao-Ling Pang1,3

  • 1School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

Physical Review Letters
|April 24, 2019
PubMed
Summary
This summary is machine-generated.

Researchers observed a parity-induced thermalization gap in disordered photonic ring structures. This gap, related to photon statistics and chiral symmetry, appears in limited scales despite Anderson localization.

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Area of Science:

  • Condensed Matter Physics
  • Photonics
  • Quantum Optics

Background:

  • Gaps between states are common in physical systems, including photonic and plasmonic analogs.
  • A thermalization gap, reflecting inaccessible photon statistics, was proposed for disordered structures, linked to disorder-immune chiral symmetry.
  • Lattice topology influences photon statistics, especially in ring lattices where parity (odd/even sites) is key.

Purpose of the Study:

  • To experimentally observe a parity-induced thermalization gap in disordered ring photonic structures.
  • To investigate the interplay between parity-dependent chiral symmetry, disorder, and photon statistics in ring lattices.
  • To explore the influence of Anderson localization on the thermalization gap phenomenon.

Main Methods:

  • Fabrication of strongly disordered ring photonic structures.
  • Experimental measurement of photon statistics.
  • Analysis of disorder-immune chiral symmetry and its relation to parity.

Main Results:

  • First experimental observation of a parity-induced thermalization gap in disordered ring photonic structures.
  • Evidence of parity-dependent, disorder-immune chiral symmetry influencing photon statistics.
  • The thermalization gap is observable on a limited scale, though Anderson localization dominates in larger structures.

Conclusions:

  • Parity plays a crucial role in dictating photon statistics and inducing thermalization gaps in ring lattices.
  • The study clarifies the relationship between symmetry, disorder, and localization in photonic systems.
  • Findings may inform the design of new photonic devices for information processing and quantum control.