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Dissipative Preparation of Spin Squeezed Atomic Ensembles in a Steady State
(American Physical Society (APS), 2013)
We present and analyze a new approach for the generation of atomic spin-squeezed states. Our method involves the collective coupling of an atomic ensemble to a decaying mode of an open optical cavity. We demonstrate the ...
Polaronic model of two-level systems in amorphous solids
(American Physical Society (APS), 2013)
While two-level systems (TLSs) are ubiqitous in solid state systems, microscopic understanding of their nature remains an outstanding problem. Conflicting phenomenological models are used to describe TLSs in seemingly ...
Photonic Quantum Transport in a Nonlinear Optical Fiber
(Institute of Physics, 2011)
We theoretically study the transmission of few-photon quantum fields through a strongly nonlinear optical medium. We develop a general approach to investigate nonequilibrium quantum transport of bosonic fields through a ...
Quantum Transport of Strongly Interacting Photons in a One-Dimensional Nonlinear Waveguide
(American Physical Review, 2012)
We present a theoretical technique for solving the quantum transport problem of a few photons through a one-dimensional, strongly nonlinear waveguide. We specifically consider the situation where the evolution of the optical ...
Enhanced Antiferromagnetic Exchange between Magnetic Impurities in a Superconducting Host
(American Physical Society (APS), 2014)
It is generally believed that superconductivity only weakly affects the indirect exchange between
magnetic impurities. If the distance r between impurities is smaller than than the superconducting
coherence length \((r ...
Modulation Spectroscopy and Dynamics of Double Occupancies in a Fermionic Mott Insulator
(American Physical Society, 2009)
We calculate the rate of creation of double occupancies in a 3D Fermionic Mott insulator near half-filling by modulation of optical lattice potential. At high temperatures, incoherent holes lead to a broad response peaked ...
Double Quantum Dots in Carbon Nanotubes
(American Physical Society, 2010)
We study the two-electron eigenspectrum of a carbon-nanotube double quantum dot with spin-orbit coupling. Exact calculations are combined with a simple model to provide an intuitive and accurate description of single-particle ...
Tunable Superfluidity and Quantum Magnetism with Ultracold Polar Molecules
(American Physical Society, 2011)
By selecting two dressed rotational states of ultracold polar molecules in an optical lattice, we obtain a highly tunable generalization of the \(t-J\) model, which we refer to as the \(t-J-V-W\) model. In addition to XXZ ...
Adiabatic Preparation of Many-Body States in Optical Lattices
(American Physical Society, 2010)
We analyze a technique for the preparation of low-entropy many-body states of atoms in optical lattices based on adiabatic passage. In particular, we show that this method allows preparation of strongly correlated states ...
Relaxation of Fermionic Excitations in a Strongly Attractive Fermi Gas in an Optical Lattice
(American Physical Society, 2011)
We theoretically study the relaxation of high energy single particle excitations into molecules in a system of attractive fermions in an optical lattice, both in the superfluid and the normal phase. In a system characterized ...