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Topological Quantum Computing
Open Quantum Systems Decoherence
Non-Hermitian topological phase transitions in superlattices and the optical Dirac equation
arXiv
Authors: Stefano Longhi
Year
2021
Paper ID
61863
Status
Preprint
Abstract Read
~2 min
Abstract Words
72
Citations
N/A
Abstract
Optical superlattices with sublattice symmetry subjected to a synthetic imaginary gauge field undergo a topological phase transition in the Bloch energy spectrum, characterized by the change of a spectral winding number. For a narrow gap, the phase transition is of universal form and described by a non-Hermitian Dirac equation with Lorentz-symmetry violation. A simple photonic system displaying such a phase transition is discussed, which is based on light coupling in co-propagating gratings.
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- Optical superlattices with sublattice symmetry subjected to a synthetic imaginary gauge field undergo a topological phase transition in the Bloch energy spectrum, characterized...
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