4 papers · 1 filter
Local Impurity Induced Growth and Scrambling in Clean Free Fermions
Qucheng Gao, Vikram Ravindranath, Xiao Chen
We study impurity-induced particle growth and scrambling in clean one-dimensional free-fermion systems. We show that a single local impurity can act as a branching source: particle…
Boundary Perturbation Effects in Quantum Systems with Conserved Energy and Continuous Symmetry
Qucheng Gao, Xiao Chen
We investigate one-dimensional systems with both energy conservation and a continuous symmetry, focusing on the impact of a boundary perturbation that breaks the continuous symmetr…
Scrambling Transition in Free Fermion Systems Induced by a Single Impurity
Qucheng Gao, Tianci Zhou, Pengfei Zhang +1
In quantum many-body systems, interactions play a crucial role in the emergence of information scrambling. When particles interact throughout the system, the entanglement between t…
Information Scrambling in Free Fermion Systems with a Sole Interaction
Qucheng Gao, Pengfei Zhang, Xiao Chen
It is well established that the presence of single impurity can have a substantial impact on the transport properties of quantum many-body systems at low temperature. In this work,…