2007/11/30 by M. Blasone, Massimo Blasone, F. Dell'Anno +7 · 3 citations
Computer Science · Physics and Astronomy · #Computer science #Measure (data warehouse) #Mixing (physics) #Multipartite #Multipartite entanglement #Neutrino #Neutrino Physics Research #Neutrino oscillation #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum #Quantum Information and Cryptography #Quantum decoherence #Quantum entanglement #Quantum mechanics #Squashed entanglement #Statistical physics #hep-ph #hep-th #quant-ph
paper · pdf · doi:10.1103/physrevd.77.096002
published as Phys. Rev. D 77, 096002 (2008) · 18 pages, 7 figures
arxiv created 2008/03/18 · openalex publication_date 2008/05/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In the physics of flavor mixing, the flavor states are given by superpositions of mass eigenstates. By using the occupation number to define a multiqubit space, the flavor states can be interpreted as multipartite mode-entangled states. By exploiting a suitable global measure of entanglement, based on the entropies related to all possible bipartitions of the system, we analyze the correlation properties of such states in the instances of three- and four-flavor mixing. Depending on the mixing parameters, and, in particular, on the values taken by the free phases, responsible for the CP-violation, entanglement concentrates in certain bipartitions. We quantify in detail the amount and the distribution of entanglement in the physically relevant cases of flavor mixing in quark and neutrino systems. By using the wave packet description for localized particles, we use the global measure of entanglement, suitably adapted for the instance of multipartite mixed states, to analyze the decoherence, induced by the free evolution dynamics, on the quantum correlations of stationary neutrino beams. We define a decoherence length as the distance associated with the vanishing of the coherent interference effects among massive neutrino states. We investigate the role of the CP-violating phase in the decoherence process.