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Boundary effects in the critical scaling of entanglement entropy in 1D systems
Nicolas Laflorencie, Erik S. Sorensen, Ming-Shyang Chang +1
We present exact diagonalization and density matrix renormalization group results for the entanglement entropy of critical spin-1/2 XXZ chains. We find that open boundary condition…
Random-exchange quantum Heisenberg antiferromagnets on the square lattice
Nicolas Laflorencie, Stefan Wessel, Andreas Laeuchli +1
The ground state properties of random-exchange spin-1/2 Heisenberg antiferromagnets on the square lattice are investigated using a combination of quantum Monte Carlo simulations, e…
Quantum spin glass and the dipolar interaction
Moshe Schechter, Nicolas Laflorencie
Systems in which the dipolar energy dominates the magnetic interaction, and the crystal field generates strong anisotropy favoring the longitudinal interaction terms, are considere…
Critical phenomena and quantum phase transition in long range Heisenberg antiferromagnetic chains
Nicolas Laflorencie, Ian Affleck, Mona Berciu
Antiferromagnetic Hamiltonians with short-range, non-frustrating interactions are well-known to exhibit long range magnetic order in dimensions, but exhibit only quasi lo…
Scaling of Entanglement Entropy in the Random Singlet Phase
Nicolas Laflorencie
We present numerical evidences for the logarithmic scaling of the entanglement entropy in critical random spin chains. Very large scale exact diagonalizations performed at the crit…
Confinement and critical regime in doped frustrated quasi-one dimensional magnets
Nicolas Laflorencie, Didier Poilblanc
Ground state and finite temperature properties of a system of coupled frustrated and/or dimerized spin-1/2 chains modeling e.g. the CuGeO compound are reviewed. Special emphasi…