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quant-ph2025
Exploring the topology of a non-Hermitian superconducting qubit using shortcuts to adiabaticity
Serra Erdamar, Maryam Abbasi, Weijian Chen +3
Open quantum systems described by a non-Hermitian Hamiltonian exhibit rich dynamics due to the topology of their complex energy spectrum. By encircling an exceptional point degener…
quant-ph2025
Higher-order exceptional points in composite non-Hermitian systems
Jan Wiersig, Weijian Chen
We show that a composite quantum system described by the tensor product of multiple systems each with a leading-order exceptional point (a non-Hermitian degeneracy at which not onl…
quant-ph2024
Chiral Bell-state transfer via dissipative Liouvillian dynamics
Shishir Khandelwal, Weijian Chen, Kater W. Murch +1
Chiral state transfer along closed loops in the vicinity of an exceptional point is one of the many counter-intuitive observations in non-Hermitian physics. The application of this…