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11 papers · 2 filters
Characterizing high-dimensional quantum contextuality
Xiao-Dong Yu, Isadora Veeren, Otfried Gühne
As a phenomenon encompassing measurement incompatibility and Bell nonlocality, quantum contextuality is not only central to our understanding of quantum mechanics, but also an esse…
Certifying Quantum Separability with Adaptive Polytopes
Ties-A. Ohst, Xiao-Dong Yu, Otfried Gühne +1
The concept of entanglement and separability of quantum states is relevant for several fields in physics. Still, there is a lack of effective operational methods to characterise th…
Correlation-induced coherence and its use in detecting quantum phase transitions
Ming-Ming Du, Abdul Sattar Khan, Zhao-Yi Zhou +1
The past two decades have witnessed a surge of interest in exploring correlation and coherence measures to investigate quantum phase transitions (QPTs). Here, motivated by the cont…
Maximal coin-position entanglement generation in a quantum walk for the third step and beyond regardless of the initial state
Xiao-Xu Fang, Kui An, Bai-Tao Zhang +2
We study maximal coin-position entanglement generation via a discrete-time quantum walk, in which the coin operation is randomly selected from one of two coin operators set at each…
Approaching Heisenberg-scalable thermometry with built-in robustness against noise
Da-Jian Zhang, D. M. Tong
It is a major goal in quantum thermometry to reach a scaling of thermometric precision known as Heisenberg scaling but is still in its infancy to date. The main obstacle is t…
Robust population transfer of spin states by geometric formalism
Kangze Li, Guofu Xu
Accurate population transfer of uncoupled or weakly coupled spin states is crucial for many quantum information processing tasks. In this paper, we propose a fast and robust scheme…