Quantum light transport in phase-separated Anderson localization fiber

Abstract

Propagation of light by Anderson localization has been demonstrated in micro-nano-structured fibers. In this work, we introduce a phase separated glass Anderson localization optical fiber for quantum applications. By using a spontaneous parametric down-conversion source, multi-photon detection with a single-photon avalanche diode array camera, and signal post-processing techniques, we demonstrate quantum light transport, where spatial correlations between photon pairs are preserved after propagation. In order to better understand and improve light transport, we study light localization, observing a dependence on wavelength. Our results indicate that the proposed phase separated fiber may become an effective platform for quantum imaging and communication.

Anderson Localization in Dissipative Lattices

“…Such a universal phenomenon occurs both in quantum and classical systems and is of wide impact in various fields of physics with major implications in quantum and condensed‐matter physics, Bose–Einstein condensates, photonic and quantum technologies. [ 2–28 ] In his seminal paper, [ 1 ] Anderson analyzed the problem of propagation of a single quantum particle in a disordered potential under unitary time evolution, that is, in the coherent Hamiltonian limit. In this regime the localization phenomenon arises from an intricate interference effect, where the destructive interference of many amplitudes leads to the exponential localization of the wave functions.…”