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11 papers · 2 filters
The matrix product representations for all valence bond states
Vahid Karimipour, Laleh Memarzadeh
We introduce a simple representation for irreducible spherical tensor operators of the rotation group of arbitrary integer or half integer rank and use these tensor operators to co…
Seeking better times: atomic clocks in the generalized Tonks-Girardeau regime
S. V. Mousavi, A. del Campo, I. Lizuain +2
This article is based on the talk with the same title at the Blaubeuren meeting. First we discuss briefly the importance of time and time keeping, explaining the basic functioning…
The renormalization of entanglement in the anisotropic Heisenberg (XXZ) model
M. Kargarian, R. Jafari, A. Langari
We have applied our recent approach (Kargarian, et.al Phys. Rev. A 76, 60304 (R) (2007)) to study the quantum information properties of the anisotropic s=1/2 Heisenberg chain. We h…
Renormalization of concurrence: the application of quantum renormalization group to the quantum information systems
M. Kargarian, R. Jafari, A. Langari
We have combined the idea of renormalization group and quantum information theory. We have shown how the entanglement or concurrence evolve as the size of the system being large, i…
Exact ground states for two new spin-1 quantum chains, new features of matrix product states
S. Alipour, V. Karimipour, L. Memarzadeh
We use the matrix product formalism to find exact ground states of two new spin-1 quantum chains with nearest neighbor interactions. One of the models, model I, describes a one-par…
Memory Effects in Spin Chain Channels for Information Transmission
A. Bayat, D. Burgarth, S. Mancini +1
We investigate the multiple use of a ferromagnetic spin chain for quantum and classical communications without resetting. We find that the memory of the state transmitted during th…