当前位置：
首页 >
科研成果 >
学术活动 >
学术报告
[理论室学术报告] Quantum Information Scrambling with a HighComplexity Operator Mapping
时间: 
2018年07月24日 10:00 
地点: 
M830 
报告人: 
Xiaopeng Li 
Fudan University
Abstract: Recently, quantum information scrambling has attracted much attention amid the effort to reconcile the apparent conflict between quantummechanical unitarity and the irreversibility of thermalizaiton in quantum manybody systems. Here we propose an unconventional mechanism to generate quantum information scrambling through a highcomplexity mapping from logical to physical degrees of freedom that hides the logical information into nonseparable manybody correlations. We develop an algorithm to compute all physical observables in dynamics with a polynomialinsystemsize cost. The system shows information scrambling in the quantum manybody Hilbert space characterized by the spreading of Hamming distance defined by a set of a natural orbital bases, which can also be calculated with a time polynomial in system size. Despite the polynomial complexity, the operatormapping enabled growth in the outoftimeordercorrelator still exhibits quantum chaotic behavior. The informationhiding mapping approach opens up a novel venue to investigate fundamental connections among computational complexity, information scrambling and quantum thermalization.
Contact: Lei Wang 9853

