researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 2017 · quant-phShow all

6 papers · 2 filters

quant-ph2017★ 18 cited

Violations of a Leggett-Garg inequality without signalling for a photonic qutrit probed with ambiguous measurements

Kunkun Wang, Clive Emary, Mengyan Xu +4

We realise a quantum three-level system with photons distributed among three different spatial and polarization modes. Ambiguous measurement of the state of the qutrit are realised…

quant-ph2017★ 211 cited

Detecting topological invariants in nonunitary discrete-time quantum walks

Xiang Zhan, Lei Xiao, Zhihao Bian +5

We report the experimental detection of bulk topological invariants in nonunitary discrete-time quantum walks with single photons. The nonunitarity of the quantum dynamics is enfor…

quant-ph2017★ 22 cited

Hidden antiunitary symmetry behind "accidental" degeneracy and its protection of degeneracy

Jing-Min Hou, Wei Chen

In quantum mechanics, accidental degeneracy refers to energy degeneracy that occurs coincidentally, without any protection by symmetry. Here, we prove a theorem stating that any tw…

quant-ph2017★ 76 cited

Entanglement-enhanced quantum metrology in a noisy environment

Kunkun Wang, Xiaoping Wang, Xiang Zhan +4

Quantum metrology overcomes standard precision limits and plays a central role in science and technology. Practically it is vulnerable to imperfections such as decoherence. Here, w…

quant-ph2017★ 38 cited

Optimal experimental demonstration of error-tolerant quantum witnesses

Kunkun Wang, George C. Knee, Xiang Zhan +3

Testing quantum theory on macroscopic scales is a longstanding challenge that might help to revolutionise physics. For example, laboratory tests (such as those anticipated in nanom…

quant-ph2017★ 51 cited

Centrality measure based on continuous-time quantum walks and experimental realization

Josh A. Izaac, Xiang Zhan, Zhihao Bian +4

Network centrality has important implications well beyond its role in physical and information transport analysis; as such, various quantum walk-based algorithms have been proposed…