181 citations · 2.5k across the 63 of their papers we have counts for
8 papers · 1 filter
Universal steering inequalities
Huangjun Zhu, Masahito Hayashi, Lin Chen
We propose a general framework for constructing universal steering criteria that are applicable to arbitrary bipartite states and measurement settings of the steering party. The sa…
Multiqubit Clifford groups are unitary 3-designs
Huangjun Zhu
Unitary -designs are a ubiquitous tool in many research areas, including randomized benchmarking, quantum process tomography, and scrambling. Despite the intensive efforts of ma…
Nonexistence of sharply covariant mutually unbiased bases in odd prime dimensions
Huangjun Zhu
Mutually unbiased bases (MUB) are useful in a number of research areas. The symmetry of MUB is an elusive and interesting subject. A (complete set of) MUB in dimension is sharp…
Mutually unbiased bases as minimal Clifford covariant 2-designs
Huangjun Zhu
Mutually unbiased bases (MUB) are interesting for various reasons. The most attractive example of (a complete set of) MUB is the one constructed by Ivanović as well as Wootters and…
Permutation Symmetry Determines the Discrete Wigner Function
Huangjun Zhu
The Wigner function provides a useful quasiprobability representation of quantum mechanics, with applications in various branches of physics. Many nice properties of the Wigner fun…
Achieving quantum precision limit in adaptive qubit state tomography
Zhibo Hou, Huangjun Zhu, Guo-Yong Xiang +2
The precision limit in quantum state tomography is of great interest not only to practical applications but also to foundational studies. However, little is known about this subjec…
Error-compensation measurements on polarization qubits
Zhibo Hou, Huangjun Zhu, Guo-Yong Xiang +2
Systematic errors are inevitable in most measurements performed in real life because of imperfect measurement devices. Reducing systematic errors is crucial to ensuring the accurac…
Sharply covariant mutually unbiased bases
Huangjun Zhu
Mutually unbiased bases (MUB) are an elusive discrete structure in Hilbert spaces. Many (complete sets of) MUB are group covariant, but little is known whether they can be sharply…