Universal entanglement loss induced by angular uncertainty
Abstract
We study the diffraction of two maximally entangled qubits encoded into spatial modes of light with orbital angular momenta ±ℏl0, on angular apertures. Exploiting the uncertainty relation between angular position and momentum, we quantify the diffraction-induced entanglement loss, for different l0, as a function of the angular uncertainty Δφ induced by the apertures. We demonstrate that the degradation of entanglement follows a universal law parametrised by the product l0Δφ alone.
- Publication:
-
Journal of Optics
- Pub Date:
- February 2020
- DOI:
- 10.1088/2040-8986/ab66d0
- arXiv:
- arXiv:1909.09790
- Bibcode:
- 2020JOpt...22b4002S
- Keywords:
-
- entanglement;
- orbital angular momentum;
- uncertainty relation;
- Quantum Physics
- E-Print:
- 10 pages, 4 figures, updated version as accepted for publication in journal of optics, comments are welcome