A non-Hermitian \mathcal{P}\mathcal{T} symmetric Bose–Hubbard model: eigenvalue rings from unfolding higher-order exceptional points

DOI10.1088/1751-8113/41/25/255206zbMath1192.81420arXiv0802.3164OpenAlexW3122158587MaRDI QIDQ3531145

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Publication date: 21 October 2008

Published in: Journal of Physics A: Mathematical and Theoretical (Search for Journal in Brave)

Full work available at URL: https://arxiv.org/abs/0802.3164

Mathematics Subject Classification ID

Applications of Lie groups to the sciences; explicit representations (22E70) Quantum optics (81V80) Selfadjoint operator theory in quantum theory, including spectral analysis (81Q10) Phase transitions (general) in equilibrium statistical mechanics (82B26)

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