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Revealing the superfluid–Mott-insulator transition in an optical lattice
Numerical solution of single particle the density matrix ultracold atomic optical lattice parabola mott insulator
2014/12/22
We study (by an exact numerical scheme) the single-particle density matrix of ～103 ultracold atoms in an optical lattice with a parabolic confining potential. Our simulation is directly relevant to th...
Optical Conductivity of the Fröhlich Polaron
Light conductivity three-dimensional coupling mechanism function frequency light conductivity
2014/12/20
We present accurate results for optical conductivity of the three dimensional Fröhlich polaron in all coupling regimes. The systematic-error free diagrammatic quantum Monte Carlo method is employ...
Commensurate Two-Component Bosons in an Optical Lattice: Ground State Phase Diagram
Bosons optical lattice superfluid quantum systems and quantum
2014/12/20
Two sorts of bosons in an optical lattice at commensurate filling factors can form five stable superfluid and insulating ground states with rich and nontrivial phase diagram. The structure of the grou...
Expansion of a Quantum Gas Released from an Optical Lattice
Ultracold atoms optical lattice quantum gas the diffraction optics
2014/12/19
We analyze the interference pattern produced by ultracold atoms released from an optical lattice, commonly interpreted as the momentum distributions of the trapped quantum gas. We show that for finite...
Unusual States of Vortex Matter in Mixtures of Bose-Einstein Condensates on Rotating Optical Lattices
Superfluid parameter space vortex lattice parameters the mixture of condensed matter optical lattice
2014/12/19
In a single-component superfluid under rotation a broken symmetry in the order parameter space results in a broken translational symmetry in real space: a vortex lattice. If translational symmetry is ...
Extended Kramers-Moyal analysis applied to optical trapping
Extended Kramers-Moyal analysis optical trapping Data Analysis
2012/5/29
The Kramers-Moyal analysis is a well established approach to analyze stochastic time series from complex systems. If the sampling interval of a measured time series is too low, systematic errors occur...
Effective mode volumes and Purcell factors for leaky optical cavities
effective mode volumes Purcell factors leaky optical cavities
2011/9/19
Abstract: We show that for optical cavities with any finite dissipation, the term "cavity mode" should be understood as a solution to the Helmholtz equation with outgoing wave boundary conditions. Thi...
Cluster state generation using van der Waals and dipole-dipole interactions in optical lattices
ipole-dipole interactions optical lattices
2011/9/9
We present a scalable method for generation of a cluster state for measurement-based quantum computing using van der Waals or dipole-dipole interactions between neutral atoms or polar molecules in an ...
Feasible optical weak measurements of complementary observables via a single Hamiltonian
optical weak measurements Hamiltonian optical weak measurements
2011/9/15
We show that the process of three-wave mixing in a non-linear crystal (such as employed in down conversion processes) can be used for versatile weak measurements. That is the crystal field interaction...
Non-adiabatic transitions in a non-symmetric optical lattice
Non-adiabatic transitions non-symmetric optical lattice
2011/7/27
Abstract: We study Landau-Zener interband transitions for a non-symmetric optical lattice in the presence of an external force. We show that gain and losses of the light beam, as well as the relative ...
Resonantly Enhanced Tunneling and Transport of Ultracold Atoms on Tilted Optical Lattices
Tunneling Ultracold Atoms Tilted Optical Lattices
2011/9/9
We investigate the resonantly enhanced tunneling dynamics of ultracold bosons loaded on a tilted 1-D optical lattice, which can be used to simulate a chain of Ising spins and associated quantum phase ...
Dissipative preparation of entanglement in optical cavities
Dissipative preparation entanglement optical cavities
2010/11/8
We propose a novel scheme for the preparation of a maximally entangled state of two atoms in an optical cavity. Starting from an arbitrary initial state, a singlet state is prepared as the unique fixe...
Spatial entanglement in optical parametric oscillators with photonic crystals
entanglement optical parametric oscillators photonic crystals
2010/11/8
The effects of an intracavity photonic crystal in a multimode optical parametric oscillator are studied, with a special focus on quantum fluctuations. The capability to either stimulate or inhibit the...
Teleportation-based realization of an optical quantum two-qubit entangling gate
teleportation-based realization optical quantum entangling gate
2010/11/8
In recent years, there has been heightened interest in quantum teleportation, which allows for the transfer of unknown quantum states over arbitrary distances. Quantum teleportation not only serves as...
Optical Lattice Hamiltonians for Relativistic Quantum Electrodynamics
Optical Lattice Hamiltonians Relativistic Quantum Electrodynamics
2011/1/14
We show how interpenetrating optical lattices containing Bose-Fermi mixtures can be constructed
to emulate the thermodynamics of quantum electrodynamics (QED). We present models of neutral
atoms on ...