439 citations · 1.1k across the 17 of their papers we have counts for
17 papers
Creation of entangled atomic states by an analogue of the Dynamical Casimir Effect
K. Lange, J. Peise, B. Lücke +7
If the boundary conditions of the quantum vacuum are changed in time, quantum field theory predicts that real, observable particles can be created in the initially empty modes. Her…
Interferometric sensitivity and entanglement by scanning through quantum phase transitions in spinor Bose-Einstein condensates
P. Feldmann, M. Gessner, M. Gabbrielli +4
Recent experiments have demonstrated the generation of entanglement by quasi-adiabatically driving through quantum phase transitions of a ferromagnetic spin-1 Bose-Einstein condens…
Hidden order and symmetry protected topological states in quantum link ladders
Lorenzo Cardarelli, Sebastian Greschner, Luis Santos
We show that whereas spin-1/2 one-dimensional U(1) quantum-link models (QLMs) are topologically trivial, when implemented in ladder-like lattices these models may present an intrig…
Duality in power-law localization in disordered one-dimensional systems
X. Deng, V. E. Kravtsov, G. V. Shlyapnikov +1
The transport of excitations between pinned particles in many physical systems may be mapped to single-particle models with power-law hopping, . For randomly spaced particle…
Spin-chain model for strongly interacting one-dimensional Bose-Fermi mixtures
F. Deuretzbacher, D. Becker, J. Bjerlin +2
Strongly interacting one-dimensional (1D) Bose-Fermi mixtures form a tunable XXZ spin chain. Within the spin-chain model developed here, all properties of these systems can be calc…
Quantum Levy flights and multifractality of dipolar excitations in a random system
X. Deng, B. L. Altshuler, G. V. Shlyapnikov +1
We consider dipolar excitations propagating via dipole-induced exchange among immobile molecules randomly spaced in a lattice. The character of the propagation is determined by lon…
Density-Dependent Synthetic Gauge Fields Using Periodically Modulated Interactions
S. Greschner, G. Sun, D. Poletti +1
We show that density-dependent synthetic gauge fields may be engineered by combining periodically modu- lated interactions and Raman-assisted hopping in spin-dependent optical latt…
Spontaneous symmetry breaking in spinor Bose-Einstein condensates
M. Scherer, B. Lücke, O. Topic +6
We present an analytical model for the theoretical analysis of spin dynamics and spontaneous symmetry breaking in a spinor Bose-Einstein condensate (BEC). This allows for an excell…
Twin matter waves for interferometry beyond the classical limit
Bernd Lücke, Manuel Scherer, Jens Kruse +10
Interferometers with atomic ensembles constitute an integral part of modern precision metrology. However, these interferometers are fundamentally restricted by the shot noise limit…
Ultra-cold bosons in zig-zag optical lattices
S. Greschner, L. Santos, T. Vekua
Ultra-cold bosons in zig-zag optical lattices present a rich physics due to the interplay between frustration, induced by lattice geometry, two-body interaction and three-body cons…
Non-local state-swapping of polar molecules in bilayers
A. Pikovski, M. Klawunn, A. Recati +1
The observation of significant dipolar effects in gases of ultra-cold polar molecules typically demands a strong external electric field to polarize the molecules. We show that eve…
Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates
F. Deuretzbacher, G. Gebreyesus, O. Topic +6
Spin-changing collisions may lead under proper conditions to the parametric amplification of matter waves in spinor Bose-Einstein condensates. Magnetic dipole-dipole interactions,…
Mott-insulator phases of spin-3/2 fermions in the presence of quadratic Zeeman coupling
Karen Rodriguez, Arturo Argüelles, Maria Colomé-Tatché +2
We study the influence of the quadratic Zeeman effect in the Mott-insulator phases of hard-core spin-3/2 fermions. We show that contrary to spinor bosons, any quadratic Zeeman coup…
Bose-Fermi mixtures of self-assembled filaments of fermionic polar molecules
M. Klawunn, J. Duhme, L. Santos
Fermionic polar molecules in deep 1D optical lattices may form self-assembled filaments when the electric dipoles are oriented along the lattice axis. These composites are bosons o…
Faraday patterns in dipolar Bose-Einstein condensates
R. Nath, L. Santos
Faraday patterns can be induced in Bose-Einstein condensates by a periodic modulation of the system nonlinearity. We show that these patterns are remarkably different in dipolar ga…
Hybrid multi-site excitations in dipolar condensates in optical lattices
M. Klawunn, L. Santos
Strong 1D lattices usually lead to unconnected two-dimensional gases. The long-range character of the dipole-dipole interactions leads to a novel scenario where non-overlapping gas…
Phonon instability in two-dimensional dipolar Bose-Einstein Condensates
R. Nath, P. Pedri, L. Santos
The partially attractive character of the dipole-dipole interaction leads to phonon instability in dipolar condensates, which is followed by collapse in three-dimensional geometrie…