2005/01/01 by S. Shelly Sharma, Naresh Sharma, N. K. Sharma
Computer Science · Physics and Astronomy · #Computer science #Measure (data warehouse) #Multipartite entanglement #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Quantum teleportation #Qubit #Squashed entanglement #Teleportation #W state #quant-ph
paper · pdf · doi:10.1238/physica.topical.118a00272
published as Physica Scripta, T118, 272 - 275, (2005). · 5 pages, 3 figures, revtex, presented as poster at APHYS-2003, 13-18 October 2003, Badajoz, Spain
openalex publication_date 2005/01/01 · arxiv created 2005/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Maximally entangled states are of utmost importance to quantum communication, dense coding, and quantum teleportation. With a trapped ion placed inside a high finesse optical cavity, interacting with field of an external laser and quantized cavity field, a scheme to generate a maximally entangled three qubit GHZ state, is proposed. The dynamics of tripartite entanglement is investigated, using negativity as an entanglement measure and linear entropy as a measure of mixedness of a state. It is found that (a) the number of modes available to the subsystem determines the maximum entanglement of a subsystem, (b) at entanglement maxima and minima, linear entropy and negativity uniquely determine the nature of state, but the two measures do not induce the same ordering of states, and (c) for a special choice of system parameters maximally entangled tripartite two mode GHZ state is generated. The scheme presented for GHZ state generation is a single step process and is reduction-free.