2 papers
quant-ph2026
Nonreciprocal superradiant quantum phase transition induced by the magnon Kerr effect
Guo-Qiang Zhang, Si-Yan Lin, Wei Feng +3
Recently, proposals for realizing a nonreciprocal superradiant quantum phase transition (SQPT) have been put forward, based on either nonreciprocal interactions between two spin en…
quant-ph2025
Third-order exceptional surface in a pseudo-Hermitian superconducting circuit
Guo-Qiang Zhang, Si-Yan Lin, Wei Feng +3
Compared with an isolated exceptional point, exceptional surfaces in non-Hermitian systems are more robust against environment noises, fabrication errors, and experimental uncertai…