4 papers
Effects of the interplay between interaction and disorder in bipartite entanglement
L. F. Santos, G. Rigolin
We use a disordered anti-ferromagnetic spin-1/2 chain with anisotropic exchange coupling to model an array of interacting qubits. All qubits have the same level spacing, except two…
Strong many-particle localization and quantum computing with perpetually coupled qubits
L. F. Santos, M. I. Dykman, M. Shapiro +1
We demonstrate the onset of strong on-site localization in a one-dimensional many-particle system. The localization is obtained by constructing, in an explicit form, a bounded sequ…
Integrability of a disordered Heisenberg spin-1/2 chain
L. F. santos
We investigate how the transition from integrability to nonintegrability occurs by changing the parameters of the Hamiltonian of a Heisenberg spin-1/2 chain with defects. Randomly…
Entanglement versus chaos in disordered spin chains
L. F. Santos, G. Rigolin, C. O. Escobar
We use a Heisenberg spin-1/2 chain to investigate how chaos and localization may affect the entanglement of pairs of qubits. To measure how much entangled a pair is, we compute its…