Journal
QUANTUM SCIENCE AND TECHNOLOGY
Volume 5, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2058-9565/ab6ce6
Keywords
quantum walk; hybrid entanglement; orbital angular momentum
Funding
- Spanish Ministry MINECO [FIS2016-79508-P, SEV-2015-0522]
- European Social Fund
- Fundacio Cellex
- Generalitat de Catalunya (AGAUR) [2017 SGR 1341]
- ERC AdG OSYRIS
- National Science Centre, Poland Symfonia [2016/20/W/ST4/00314]
- Juan de la Cierva fellowship [IJCI-2017-33180]
- ERC AdG NOQIA
- Generalitat de Catalunya (CERCA/Program)
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We study the generation of hybrid entanglement in a one-dimensional quantum walk. In particular, we explore the preparation of maximally entangled states between position and spin degrees of freedom. We address it as an optimization problem, where the cost function is the Schmidt norm. We then benchmark the algorithm and compare the generation of entanglement between the Hadamard quantum walk, the random quantum walk and the optimal quantum walk. Finally, we discuss an experimental scheme with a photonic quantum walk in the orbital angular momentum of light. The experimental measurement of entanglement can be achieved with quantum state tomography.
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