2009/01/31 by Indranil Chakrabarty, I. Chakrabarty
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1140/epjd/e2010-00017-8
published as Eur. Phys. J. D 57, 265-269 (2010) · 10 pages, 1 table, Accepted in European Physical Journal D
arxiv created 2009/12/08 · openalex publication_date 2010/01/26 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this work we study a state which is a random mixture of a two qubit subsystem of a N-qubit W state and GHZ state. We analyze several possibilities like separability criterion (Peres-Horodecki criterion [14,15]), non violation of Bell's inequality [6](M(ρ)<1)and teleportation fidelity [1,2,3,4] ((Fmax>2/3)) for this state. We also obtain a relationship between N (number of qubits) and p (the classical probability of random mixture) for each of these possibilities. Finally we present a detailed analysis of all these possibilities for N=3,4,5 qubit systems. We also report that for N=3 and p∈(.75,1], this entangled state can be used as a teleportation channel without violating Bell's inequality.