2004/11/30 by D. Bruss, Dagmar Bruß, N. Datta +6 · 1 citation
Computer Science · Physics and Astronomy · #Condensed matter physics #Multipartite #Multipartite entanglement #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Spin (aerodynamics) #Squashed entanglement #W state #quant-ph
paper · pdf · doi:10.1103/physreva.72.014301
published as Phys. Rev. A 72, 014301 (2005) · 4 pages, 1 figure
arxiv created 2005/05/30 · openalex publication_date 2005/07/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the occurrence of multipartite entanglement in spin chains. We show that certain genuine multipartite entangled states, namely W states, can be obtained as ground states of simple XX type ferromagnetic spin chains in a transverse magnetic field, for any number of sites. Moreover, multipartite entanglement is proven to exist even at finite temperatures. A transition from a product state to a multipartite entangled state occurs when decreasing the magnetic field to a critical value. Adiabatic passage through this point can thus lead to the generation of multipartite entanglement.