Cold Bosonic Atoms in Optical Lattices
The dynamics of an ultracold dilute gas of bosonic atoms in an optical lattice can be described by a Bose-Hubbard model where the system parameters are controlled by laser light. We study the…
Dipole blockade and quantum information processing in mesoscopic atomic ensembles.
A technique for manipulating quantum information stored in collective states of mesoscopic ensembles by optical excitation into states with strong dipole-dipole interactions that can be employed for controlled generation of collective atomic spin states as well as nonclassical photonic states and for scalable quantum logic gates is described.
Numerical solution of the Gross--Pitaevskii equation for Bose--Einstein condensation
The cold atom Hubbard toolbox
Entanglement of Atoms via Cold Controlled Collisions
We show that by using cold controlled collisions between two atoms one can achieve conditional dynamics in moving trap potentials. We discuss implementing two qubit quantum--gates and efficient…
Creation of effective magnetic fields in optical lattices: the Hofstadter butterfly for cold neutral atoms
We investigate the dynamics of neutral atoms in a 2D optical lattice which traps two distinct internal states of the atoms in different columns. Two Raman lasers are used to coherently transfer atoms…
Possible light-induced superconductivity in K3C60 at high temperature
By exciting metallic K3C60 with mid-infrared optical pulses, a large increase in carrier mobility is induced, accompanied by the opening of a gap in the optical conductivity, which is observed at equilibrium when cooling metallic K 3C60 below Tc (20 kelvin).
Entangling Macroscopic Diamonds at Room Temperature
This work generated motional entanglement between vibrational states of two spatially separated, millimeter-sized diamonds at room temperature and showed that the quantum state of the diamonds has positive concurrence with 98% probability.
Towards high-speed optical quantum memories
Quantum memories, capable of controllably storing and releasing a photon, are a crucial component for quantum computers1 and quantum communications2. To date, quantum memories3,4,5,6 have operated…
Variational quantum algorithms for nonlinear problems
- M. Lubasch, J. Joo, P. Moinier, M. Kiffner, D. Jaksch
- Computer Science, PhysicsPhysical Review A
- 21 July 2019
It is numerically show that the variational quantum ansatz can be exponentially more efficient than matrix product states and present experimental proof-of-principle results obtained on an IBM Q device.