2 papers
quant-ph2026
The noise cost of reservoir locality in broadband quantum amplifier chains
Chengxi Li, Hao Zhu, Tie-Fu Zhang +3
Directional quantum amplifiers enable weak-signal readout while protecting the source, but reservoir noise limits sensitivity. Finite-band suppression must reconcile frequency-depe…
cond-mat.mes-hall2026
Cooperative Boundary Switching of Mesoscopic Real Spectra in a Non-Hermitian Chain Family
Chengxi Li, Hao Zhu, Tie-Fu Zhang +2
At fixed bulk criticality, every fixed nonsingular real single-end potential preserves a growing local population of real eigenvalues in an open analytic family of non-Hermitian ch…