Dephasing of Single-Photon Orbital Angular Momentum Qudit States in Fiber: Limits to Correction via Dynamical Decoupling
Year: 2016
Type: article
Abstract: The bit rate for photonic quantum-state transmission can be raised by encoding more than one bit per photon, using multiple temporal, spatial, polarization, and frequency modes and preparing a single photon in a superposition of these modes as a $q\phantom{\rule{0}{0ex}}u\phantom{\rule{0}{0ex}}d\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t$. As always, state dephasing limits the performance of such technologies. This study shows that the qudit approach cannot be ramped up to arbitrarily high quantum numbers of orbital angular momentum---but there is a path to passive linear optical elements that can mitigate the inevitable dephasing and keep fidelity high.
Source: Physical Review Applied
Authors: Manish K. Gupta, Jonathan P. Dowling
Institution: Louisiana State University
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2242374209