Swapping path-spin intraparticle entanglement onto spin-spin interparticle entanglement

2009/09/30 by Satyabrata Adhikari, S. Adhikari, A. S. Majumdar +3 · 31 citations
Computer Science · Physics and Astronomy · #Beam splitter #Multipartite entanglement #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Qubit #Spin (aerodynamics) #Squashed entanglement #quant-ph

paper · pdf · doi:10.1209/0295-5075/89/10005

published in Europhysics Letters (EPL) 89(1), 10005 (Institute of Physics) · 5 pages, 1 Figure

openalex publication_date 2010/01/01 · arxiv created 2010/02/19 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Based on a scheme that produces an entanglement between the spin and the path variables of a single spin-1/2 particle (qubit) using a beam-splitter and a spin-flipper, we formulate a procedure for transferring this intraparticle hybrid entanglement to an interparticle entanglement between the spin variables of two other spatially separated spin-1/2 particles which never interact with each other during the entire process. This procedure of entanglement swapping is accomplished by a Mach-Zehnder setup in conjunction with the Stern-Gerlach measuring device, using suitable unitary operations. The proposed protocol, thus, enables the use of intraparticle entanglement as a resource - a feature that has remained unexplored.

Citations

• Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels
• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Teleportation of quantum states
• Quantum cryptography based on Bell’s theorem
• Quantum entanglement
• Quantum Theory: Concepts and Methods
• Introduction to Quantum Computation and Information