217 citations · 1.3k across the 53 of their papers we have counts for
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Displaced Fermionic Gaussian States and their Classical Simulation
Xingjian Lyu, Kaifeng Bu
This work explores displaced fermionic Gaussian operators with nonzero linear terms. We first demonstrate equivalence between several characterizations of displaced Gaussian states…
Fermionic Gaussian Testing and Non-Gaussian Measures via Convolution
Xingjian Lyu, Kaifeng Bu
We define fermionic convolution and demonstrate its utility in characterizing fermionic non-Gaussian components, which are essential to the computational advantage of fermionic sys…
On the Hardness of Measuring Magic
Roy J. Garcia, Gaurav Bhole, Kaifeng Bu +3
Quantum computers promise to solve computational problems significantly faster than classical computers. These 'speed-ups' are achieved by utilizing a resource known as magic. Meas…
Extremality of stabilizer states
Kaifeng Bu
We investigate the extremality of stabilizer states to reveal their exceptional role in the space of all -qubit/qudit states. We establish uncertainty principles for the charact…
Magic Class and the Convolution Group
Kaifeng Bu, Arthur Jaffe, Zixia Wei
The classification of many-body quantum states plays a fundamental role in the study of quantum phases of matter. In this work, we propose an approach to classify quantum states by…
Resource Theory of Non-Revivals with Applications to Quantum Many-Body Scars
Roy J. Garcia, Kaifeng Bu, Liyuan Chen +1
The study of state revivals has a long history in dynamical systems. We introduce a resource theory to understand the use of state revivals in quantum physics, especially in quantu…
Quantum Ruzsa Divergence to Quantify Magic
Kaifeng Bu, Weichen Gu, Arthur Jaffe
In this work, we investigate the behavior of quantum entropy under quantum convolution and its application in quantifying magic. We first establish an entropic, quantum central lim…
Magic Resource Can Enhance the Quantum Capacity of Channels
Kaifeng Bu, Arthur Jaffe
We investigate the role of magic resource in the quantum capacity of channels. We consider the quantum channel of the recently proposed discrete beam splitter with the fixed enviro…