7 citations · 15 across the 10 of their papers we have counts for
5 papers · 1 filter
Optimal estimation of three parallel spins with genuine and restricted collective measurements
Changhao Yi, Kai Zhou, Zhibo Hou +2
Collective measurements on identical and independent quantum systems can offer advantages in information extraction compared with individual measurements. However, little is known…
Third moments of qudit Clifford orbits and 3-designs based on magic orbits
Huangjun Zhu, Chengsi Mao, Changhao Yi
When the local dimension is an odd prime, the qudit Clifford group is only a 2-design, but not a 3-design, unlike the qubit counterpart. This distinction and its extension to C…
Nearly query-optimal classical shadow estimation of unitary channels
Zihao Li, Changhao Yi, You Zhou +1
Classical shadow estimation (CSE) is a powerful tool for learning the properties of quantum states and quantum processes. Here we consider the CSE task for quantum unitary channels…
Qudit Shadow Estimation Based on the Clifford Group and the Power of a Single Magic Gate
Chengsi Mao, Changhao Yi, Huangjun Zhu
Shadow estimation is a sample-efficient protocol for learning the properties of a quantum system using randomized measurements, but the current understanding of qudit shadow estima…
Faster Randomized Dynamical Decoupling
Changhao Yi, Leeseok Kim, Milad Marvian
We present a randomized dynamical decoupling (DD) protocol that can improve the performance of any given deterministic DD, by using no more than two additional pulses. Our construc…