6 papers
Quantum States Protection under Environmental Noise
Kai Wang, Zhen-Yang Peng
All realistic quantum systems are inevitably in contact with the environment. Suppressing theimpact of environmental noise is a critical challenge in cutting-edge quantum technolog…
Finite and disordered Kitaev chains: a large deviation study
Clément Fortin, Kai Wang, Tami Pereg-Barnea
Topological edge states are celebrated for their robustness against disorder, yet the interplay between disorder and system size remains poorly understood. We use large deviations…
A Deterministic Dimension Property of Twisted Goppa Codes
Kai Wang
This paper presents a large-scale computational study on the dimensional properties of twisted Goppa codes. Through the systematic analysis of over 50,000 parameter sets, we uncove…
Unifying Anderson transitions and topological amplification in non-Hermitian chains
Clément Fortin, Kai Wang, T. Pereg-Barnea
Non-Hermitian systems with non-reciprocal hopping may display the non-Hermitian skin effect, where states under open boundary conditions localize exponentially at one edge of the s…
Quantum Purification for Amplitude Damping Noise
Kai Wang, Zhen-Yang Peng
Noise poses a fundamental challenge to quantum information processing, with amplitude-damping (AD) noise being particularly detrimental. Preserving high-fidelity quantum systems th…
Topological Amplification of the Bosonic Kitaev Chain with Non-Uniform Loss
Clément Fortin, Kai Wang, T. Pereg-Barnea
The bosonic Kitaev chain is known to have extraordinary properties distinct from its fermionic counterpart. For example, it exhibits the non-Hermitian skin effect -- its eigenmodes…