Quantum simulations and quantum walks

Observation of localization and quasiperiodic dynamics in a one dimensional photonic quantum walk

speaker: Peng Xue (Department of Physics, Southeast University)

abstract: We observe the localization effect and quasiperiodic dynamics of coherent diffusion in a one-dimensional photonic quantum walk with position-dependent phase defects which is a natural model for a diffusion modified by quantum or interference effects. An ideal standard quantum walk is characterized by a ballistic spread of wavepacket. By introducing controllable decoherence we observe the quantum-to-classical transmission in a quantum walk architecture. By applying positiondependent phase defects, the translational symmetry of an ideal standard quantum walk is broken by the periodic perturbation on sites resulting in localization effect and quasiperiodic behavior of the wavepackets.

timetable:
Tue 12 Nov, 17:00 - 17:30, Sala Stemmi
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