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- Institute for Research in Fundamental SciencesIR578 papers
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6 papers · 2 filters
Displacement and Squeeze Operators of a Three-Dimensional Harmonic Oscillator and Their Associated Quantum States
Mehdi Miri, Sina Khorasani
We generalized the squeeze and displacement operators of the one-dimensional harmonic oscillator to the three-dimensional case and based on these operators we construct the corresp…
Bound entanglement in quantum phase transitions
S. Baghbanzadeh, S. Alipour, A. T. Rezakhani
We investigate quantum phase transitions in which a change in the type of entanglement from bound entanglement to either free entanglement or separability may occur. In particular,…
Quantum 2-Body Hamiltonian for Topological Color Codes
H. Bombin, M. Kargarian, M. A. Martin-Delgado
We introduce a two-body quantum Hamiltonian model with spins-$\half$ located on the vertices of a 2D spatial lattice. The model exhibits an exact topological degeneracy in all coup…
A complete characterization of the spectrum of the Kitaev model on spin ladders
Vahid Karimipour
We study the Kitaev model on a ladder network and find the complete spectrum of the Hamiltonian in closed form. Closed and manageable forms for all eigenvalues and eigenvectors, al…
Dzyaloshinskii-Moriya Interaction and Anisotropy effects on the Entanglement of Heisenberg Model
M. Kargarian, R. Jafari, A. Langari
In this paper the the effect of Dzyaloshinskii-Moriya interaction and anisotropy on the Entanglement of Heisenberg chain has been studied. While the anisotropy suppress the entangl…
New Phase Transitions in Optimal States for Memory Channels
Vahid Karimipour, Zohreh Meghdadi, Laleh Memarzadeh
We investigate the question of optimal input ensembles for memory channels and construct a rather large class of Pauli channels with correlated noise which can be studied analytica…