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20172020
most citedDetecting topological invariants in nonunitary discrete-time quantum walks

211 citations · 211 across the 2 of their papers we have counts for

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5 papers · 1 filter

quant-ph2019

Topology with broken parity-time symmetry

Lei Xiao, Xingze Qiu, Kunkun Wang +3

Topological edge states arise in parity-time ()-symmetric non-unitary quantum dynamics but have so far only been discussed in the -symmetry-unbroken reg…

quant-ph2018

Higher winding number in a non-unitary photonic quantum walk

Lei Xiao, Xingze Qiu, Kunkun Wang +6

Topological matter exhibits exotic properties yet phases characterized by large topological invariants are difficult to implement, despite rapid experimental progress. A promising…

quant-ph2018

Observation of emergent momentum-time skyrmions in parity-time-symmetric non-unitary quench dynamics

Kunkun Wang, Xingze Qiu, Lei Xiao +5

Topology in quench dynamics gives rise to intriguing dynamic topological phenomena, which are intimately connected to the topology of static Hamiltonians yet challenging to probe e…

quant-ph2018

Simulating dynamic quantum phase transitions in photonic quantum walks

Kunkun Wang, Xingze Qiu, Lei Xiao +4

Signaled by non-analyticities in the time evolution of physical observables, dynamic quantum phase transitions (DQPTs) emerge in quench dynamics of topological systems and possess…

quant-ph2017211 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…