Non-Hermitian Physics: including Non-Hermitian Quantum Mechanics and Optics, as well as PT-Symmetry and Exceptional Points

    1. B. Peng, S.K. Ozdemir, W. Chen, F. Nori, L. Yang
      What is and what is not electromagnetically induced transparency in whispering-gallery microcavities
      Nature Communications 5, 5082 (2014). [PDF][Link][arXiv]
      The supplementary material is here [PDF][Link].

    2. B. Peng, S.K. Ozdemir, S. Rotter, H. Yilmaz, M. Liertzer, F. Monifi, C. M. Bender, F. Nori, L. Yang
      Loss-induced suppression and revival of lasing
      Science 346, 328-332 (2014). [PDF][Link][arXiv]
      The supplementary material is here [PDF][Link].
      Also featured in a "Perspective" Science 346, 304-305 (2014) [PDF][Link].

    3. B. Peng, S.K. Ozdemir, F. Lei, F. Monifi, M. Gianfreda, G. L. Long, S. Fan, F. Nori, C. M. Bender, L. Yang
      Parity-time-symmetric whispering-gallery microcavities
      Nature Physics 10, 394-398 (2014). [PDF][Link][arXiv]
      The supplementary material is here [PDF][Link]
      Featured in a Nature Physics "News & Views" [PDF][Link]

    4. H. Jing, S.K. Ozdemir, X.Y. Lu, J. Zhang, L. Yang, F. Nori
      PT-Symmetric Phonon Laser
      Phys. Rev. Lett. 113, 053604 (2014). [PDF][Link][arXiv]
      The supplementary material is here [PDF][Link]

    5. H. Jing, S.K. Ozdemir, Z. Geng, J. Zhang, X.Y. Lu, B. Peng, L. Yang, F. Nori
      Optomechanically-Induced Transparency in parity-time-symmetric microresonators
      Scientific Reports 5, 9663 (2015). [PDF][Link][arXiv]
    6. J. Zhang, B. Peng, S.K. Ozdemir, Y.X. Liu, H. Jing, X.Y. Lu, Y.L. Liu, L. Yang, F. Nori
      Giant nonlinearity via breaking parity-time symmetry: A route to low-threshold phonon diodes
      Phys. Rev. B 92, 115407 (2015). [PDF][Link][arXiv]
    7. T. Gao, E. Estrecho, K.Y. Bliokh, T.C.H. Liew, M.D. Fraser, S. Brodbeck, M. Kamp, C. Schneider, S. Höfling, Y. Yamamoto, F. Nori, Y.S. Kivshar, A. Truscott, R. Dall, E.A. Ostrovskaya
      Observation of non-Hermitian degeneracies in a chaotic exciton-polariton billiard
      Nature 526, 15522 (2015). [PDF][Link][arXiv]
    8. F. Monifi, J. Zhang, S.K. Ozdemir, B. Peng, Y.X. Liu, F. Bo, F. Nori, L. Yang
      Optomechanically induced stochastic resonance and chaos transfer between optical fields
      Nature Photonics 10, 399–405 (2016). [PDF][Link][Suppl. Info.]
      Nature Photonics Cover [PNG]
      Featured in a "News and Views”: Optomechanics: Vibrations copying optical chaos,
      Nature Photonics 10, 366–368 (2016). [PDF][Link]

    9. Z.P. Liu, J. Zhang, S.K. Ozdemir, B. Peng, H. Jing, X.Y. Lu, C.W. Li, L. Yang, F. Nori, Y.X. Liu
      Metrology with PT-Symmetric Cavities: Enhanced Sensitivity near the PT-Phase Transition
      Phys. Rev. Lett. 117, 110802 (2016). [PDF][Link][arXiv][Suppl. Info.]

    10. M. Asano, K.Y. Bliokh, Y.P. Bliokh, A.G. Kofman, R. Ikuta, T. Yamamoto, Y.S. Kivshar, L. Yang, N. Imoto, S.K. Ozdemir, F. Nori
      Anomalous time delays and quantum weak measurements in optical micro-resonators
      Nature Communications 7, 13488 (2016). [PDF][Link][arXiv][Suppl. Info.][Reviewers' Comments]

    11. D. Leykam, K.Y. Bliokh, C. Huang, Y.D. Chong, F. Nori
      Edge Modes, Degeneracies, and Topological Numbers in Non-Hermitian Systems
      Phys. Rev. Lett. 118, 040401 (2017). [PDF][Link][arXiv][Suppl. Info.]

    12. Y.L. Liu, R. Wu, J. Zhang, S.K. Ozdemir, L. Yang, F. Nori, Y.X. Liu
      Controllable optical response by modifying the gain and loss of a mechanical resonator and cavity mode in an optomechanical system
      Phys. Rev. A 95, 013843 (2017). [PDF][Link][arXiv]

    13. H. Jing, S.K. Ozdemir, H. Lu, F. Nori
      High-order exceptional points in optomechanics
      Scientific Reports 7, 3386 (2017). [PDF][Link][arXiv]

    14. H. Lu, S.K. Ozdemir, L.M. Kuang, F. Nori, H. Jing
      Exceptional Points in Random-Defect Phonon Lasers
      Phys. Rev. Applied 8, 044020 (2017). [PDF][Link][arXiv]

    15. F. Quijandría, U. Naether, S.K. Ozdemir, F. Nori, D. Zueco
      PT-symmetric circuit QED
      Phys. Rev. A 97, 053846 (2018). [PDF][Link][arXiv]
      Featured in Physics, Editors' Suggestion

    16. J. Zhang, B. Peng, S.K. Ozdemir, K. Pichler, D.O. Krimer, G. Zhao, F. Nori, Y.X. Liu, S. Rotter, L. Yang
      A phonon laser operating at an exceptional point
      Nature Photonics 12, pp. 479–484 (2018). [PDF][Link][Suppl. Info.]

    17. K.Y. Bliokh, D. Leykam, M. Lein, F. Nori
      Topological non-Hermitian origin of surface Maxwell waves
      Nature Communications 10, 580 (2019). [PDF][Link_1][Link_2][arXiv][Suppl. Info.]

    18. T. Liu, Y.R. Zhang, Q. Ai, Z. Gong, K. Kawabata, M. Ueda, F. Nori
      Second-Order Topological Phases in Non-Hermitian Systems
      Phys. Rev. Lett. 122, 076801 (2019). [PDF][Link][arXiv][Suppl. Info.]

    19. S.K. Ozdemir, S. Rotter, F. Nori, L. Yang
      Parity–time symmetry and exceptional points in photonics
      Nature Materials 18, pp. 783–798 (2019). [PDF][Link_1][Link_2]

    20. I.I. Arkhipov, A. Miranowicz, O.D. Stefano, R. Stassi, S. Savasta, F. Nori, S.K. Ozdemir
      Scully-Lamb quantum laser model for parity-time-symmetric whispering-gallery microcavities: Gain saturation effects and nonreciprocity
      Phys. Rev. A 99, 053806 (2019). [PDF][Link][arXiv]

    21. Z.Y. Ge, Y.R. Zhang, T. Liu, S.W. Li, H. Fan, F. Nori
      Topological band theory for non-Hermitian systems from the Dirac equation
      Phys. Rev. B 100, 054105 (2019). [PDF][Link][arXiv]

    22. C.Y. Ju, A. Miranowicz, G.Y. Chen, F. Nori
      No-Go Theorems in Non-Hermitian Quantum Mechanics
      preprint, (2019). [arXiv]