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Direct Experimental Test of Forward and Reverse Uncertainty Relations
Lei Xiao, Bowen Fan, Kunkun Wang +2
The canonical Robertson-Schrödinger uncertainty relation provides a loose bound for the product of variances of two non-commuting observables. Recently, several tight forward and r…
Experimental orthogonalization of highly overlapping quantum states with single photons
Gaoyan Zhu, Orsolya Kalman, Kunkun Wang +6
We experimentally realize a nonlinear quantum protocol on single-photon qubits with linear optical elements and appropriate measurements. The quantum nonlinearity is induced by pos…
Observation of non-Hermitian bulk-boundary correspondence in quantum dynamics
Lei Xiao, Tianshu Deng, Kunkun Wang +4
Bulk-boundary correspondence, a central principle in topological matter relating bulk topological invariants to edge states, breaks down in a generic class of non-Hermitian systems…
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…
Conserved quantities in parity-time symmetric systems
Zhihao Bian, Lei Xiao, Kunkun Wang +6
Conserved quantities such as energy or the electric charge of a closed system, or the Runge-Lenz vector in Kepler dynamics are determined by its global, local, or accidental symmet…