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9 papers · 2 filters
Amending coherence-breaking channels via unitary operations
Long-Mei Yang, Bin Chen, Tao Li +2
The coherence-breaking channels play a significant role in quantum information theory. We study the coherence-breaking channels and give a method to amend the coherence-breaking ch…
Partial topological Zak phase and dynamical confinement in non-Hermitian bipartite system
X. Z. Zhang, Z. Song
Unlike a Chern number in D and D topological system, Zak phase takes a subtle role to characterize the topological phase in D. On the one hand, it is not a gauge invariant…
Classical correspondence of the exceptional points in the finite non-Hermitian system
X. Z. Zhang, G. Zhang, Z. Song
We systematically study the topology of the exceptional point (EP) in the finite non-Hermitian system. Based on the concrete form of the Berry connection, we demonstrate that the e…
Dynamical signature of moire pattern in non-Hermitian ladder
X. M. Yang, X. Z. Zhang, C. Li +1
We study the dynamical behavior of a non-Hermitian moire superlattice system, which consists of two-coupled SSH chains with staggered imaginary on-site potentials. There are two ma…
Dynamics of coherence-induced state ordering under Markovian channels
Long-Mei Yang, Bin Chen, Shao-Ming Fei +1
We study the dynamics of coherence-induced state ordering under incoherent channels, particularly four specific Markovian channels: amplitude damping channel, phase damping cha…
Dynamical topological invariant for non-Hermitian Rice-Mele model
R. Wang, X. Z. Zhang, Z. Song
We study a non-Hermitian Rice-Mele model without breaking time-reversal symmetry, with the non-Hermiticity arising from imbalanced hopping rates. The Berry connection, Berry curvat…