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8 papers · 2 filters
Quantum Phase Transitions and Matrix Product States in Spin Ladders
M. Asoudeh, V. Karimipour, A. Sadrolashrafi
We investigate quantum phase transitions in ladders of spin 1/2 particles by engineering suitable matrix product states for these ladders. We take into account both discrete and co…
Entanglement and optimal strings of qubits for memory channels
V. Karimipour, L. Memarzadeh
We investigate the problem of enhancement of mutual information by encoding classical data into entangled input states of arbitrary length and show that while there is a threshold…
Transition of D- Level Quantum Systems Through Quantum Channels with Correlated Noise
A. Fahmi, M. Golshani
Entanglement and entanglement-assisted are useful resources to enhance the mutual information of the Pauli channels, when the noise on consecutive uses of the channel has some part…
Investigation of continuous-time quantum walk by using Krylov subspace-Lanczos algorithm
M. A. Jafarizadeh, S. Salimi, R. Sufiani
In papers\cite{js,jsa}, the amplitudes of continuous-time quantum walk on graphs possessing quantum decomposition (QD graphs) have been calculated by a new method based on spectral…
Reply to Entanglement split: "Comment on quantum secret sharing based on reusable Greenbergr-Horne-Zeilinger states as secure carriers"
V. Karimipour
In a recent comment, it has been shown that in a quantum secret sharing protocol proposed in [S. Bagherinezhad, V. Karimipour, Phys. Rev. {\bf A}, 67, 044302, (2003)], one of the r…
Thermal entanglement of spins in mean-field clusters
M. Asoudeh, V. Karimipour
We determine thermal entanglement in mean field clusters of spin one-half particles interacting via the anisotropic Heisenberg interaction, with and without external magnetic f…