78 citations · 281 across the 23 of their papers we have counts for
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quant-ph2020★ 10 cited
Rotation-time symmetry in bosonic systems and the existence of exceptional points in the absence of symmetry
Ewelina Lange, Grzegorz Chimczak, Anna Kowalewska-Kudłaszyk +1
We study symmetries of open bosonic systems in the presence of laser pumping. Non-Hermitian Hamiltonians describing these systems can be parity-time () symmetric in spe…
quant-ph2020
Equilibrium frame reveals hidden PT symmetry of passive systems
Grzegorz Chimczak, Anna Kowalewska-Kudłaszyk, Ewelina Lange +1
We discuss how introducing an equilibrium frame, in which a given Hamiltonian has balanced loss and gain terms, can reveal PT symmetry hidden in non-Hermitian Hamiltonians of dissi…