04. ENTANGLEMENT IN MANY-BODY SYSTEMS

Ground states of fermionic lattice Hamiltonians with permutation symmetry

Date: 
2013-08-28 - 2014-01-22
Author(s): 

C. V. Kraus, M. Lewenstein, J.I. Cirac

Reference: 

Phys. Rev. A. 88, 022335 (2013)

We study the ground states of lattice Hamiltonians that are invariant under permutations, in the limit where the number of lattice sites N∞. For spin systems, these are product states, a fact that follows directly from the quantum de Finetti theorem.

Density-dependent tunneling in the extended Bose–Hubbard model

Date: 
2013-06-26 - 2013-12-05
Author(s): 

M. Maik, P. Hauke, O. Dutta, M. Lewenstein, J. Zakrzewski

Reference: 

New J. Phys. 15, 113041 (2013)

Recently, it has become apparent that when the interactions between polar molecules in optical lattices become strong, the conventional description using the extended Hubbard model has to be modified by additional terms, in particular a density-dependent tunneling term. We investigate here the influence of this term on the ground-state phase diagrams of the two-dimensional extended Bose–Hubbard model.

Spin liquid phases of alkaline-earth-metal atoms at finite temperature

Date: 
2013-10-11 - 2013-12-05
Author(s): 

P. Sinkovicz, A. Zamora, E. Szirmai, M. Lewenstein, G. Szirmai

Reference: 

Phys. Rev. A 88, 043619 (2013)

We study spin liquid phases of spin-5/2 alkaline-earth-metal atoms on a honeycomb lattice at finite temperatures. Our analysis is based on a Gutzwiller projection variational approach recast to a path-integral formalism. In the framework of a saddle-point approximation we determine spin liquid phases with lowest free energy and study their temperature dependence.

Ground States of Fermionic lattice Hamiltonians with Permutation Symmetry

Date: 
2013-12-05
Author(s): 

Christina V. Kraus, Maciej Lewenstein, J. Ignacio Cirac

Reference: 

Phys. Rev. A. 88, 022335 (2013)

We study the ground states of lattice Hamiltonians that are invariant under permutations, in the limit where the number of lattice sites N

Aspects of Entanglement in Quantum Many-Body Systems

Date: 
2009-03-24 - 2010-03-24
Reference: 

J. W. Clark, H. Habibian, A. D. Mandilara and M. L. Ristig
Foundation of Physics, DOI 10.1007/s10701-010-9467-6 (in press)

Knowledge of the entanglement properties of the wave functions commonly used to describe quantum many-particle systems can enhance our understanding of their correlation structure and provide new insights into quantum phase transitions that are observed experimentally or predicted theoretically.

Syndicate content