N-channel parity-time symmetry

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ÖZGÜN E.

EPL, cilt.144, sa.3, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 144 Sayı: 3
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1209/0295-5075/ad0b55
  • Dergi Adı: EPL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Linguistic Bibliography, Metadex, zbMATH, Civil Engineering Abstracts
  • Hacettepe Üniversitesi Adresli: Evet

Özet

We calculated the eigenvalues for a general N-channel coupled system with parity-time symmetry due to equal loss/gain. We found that the eigenspectrum displays a mixing of parity-time symmetric and broken phases, with N−2 of the eigenvalues being parity-time broken whereas the remaining two are either parity-time symmetric or broken depending on the loss/gain and coupling parameters. Our results also show that mixing of parity-time symmetric and parity-time broken phases can only be obtained for at least four channels if other degrees of freedom such as polarization or spin are not taken into account.