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7 papers · 2 filters
Topological order in 1D Cluster state protected by symmetry
Wonmin Son, Luigi Amico, Vlatko Vedral
We demonstrate how to construct the Z2*Z2 global symmetry which protects the ground state degeneracy of cluster states for open boundary conditions. Such a degeneracy ultimately ar…
Unified view of correlations using the square norm distance
Bruno Bellomo, Gian Luca Giorgi, Fernando Galve +3
The distance between a quantum state and its closest state not having a certain property has been used to quantify the amount of correlations corresponding to that property. This a…
Optimal correlations in many-body quantum systems
Luigi Amico, Davide Rossini, Alioscia Hamma +1
Information and correlations in a quantum system are closely related through the process of measurement. We explore such relation in a many-body quantum setting, effectively bridgi…
Dynamics of correlations due to a phase noisy laser
Bruno Bellomo, Rosario Lo Franco, Erika Andersson +2
We analyze the dynamics of various kinds of correlations present between two initially entangled independent qubits, each one subject to a local phase noisy laser. We give explicit…
Statistical mechanics of the Cluster-Ising model
Pietro Smacchia, Luigi Amico, Paolo Facchi +4
We study a Hamiltonian system describing a three-spin-1/2 cluster-like interaction competing with an Ising-like anti-ferromagnetic interaction. We compute free energy, spin correla…
Transmission of classical and quantum information through a quantum memory channel with damping
A. D'Arrigo, G. Benenti, G. Falci
We consider the transfer of classical and quantum information through a memory amplitude damping channel. Such a quantum channel is modeled as a damped harmonic oscillator, the int…