Designing three-way entangled and nonlocal two-way entangled single particle states via alternate quantum walks
CoRR(2024)
摘要
Entanglement with single-particle states is advantageous in quantum
technology because of their ability to encode and process information more
securely than their multi-particle analogs. Three-way and nonlocal two-way
entangled single-particle states are desirable in this context. Herein, we
generate three-way entanglement from an initially separable state involving
three degrees of freedom (DoF) of a quantum particle, which evolves via a 2D
alternate quantum walk employing a resource-saving single-qubit coin. We
achieve maximum possible values for the three-way entanglement quantified by
the π-tangle between the 3 DoF. We also generate optimal two-way nonlocal
entanglement, quantified by the negativity between the nonlocal position and
the DoF of the particle. This prepared architecture using quantum walks can be
experimentally realized with a photon.
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