Phys. Rev. Lett. 98, 100404 (2007) We propose a method for the detection of ground state quantum phases of
spinor gases through a series of two quantum nondemolition measurements
performed by sending ...off-resonant, polarized light pulses through the gas.
Signatures of various mean-field as well as strongly-correlated phases of F=1
and F=2 spinor gases obtained by detecting quantum fluctuations and mean values
of polarization of transmitted light are identified.
We report on a novel class of defects in a hexagonal pattern which we call pentalines. They are built up of two nonbound dislocations and are orientated parallel to the roll axis of the mode free of ...a dislocation. A pentaline has its origin in a transformation of the penta-hepta defect (PHD), taking place at higher supercriticality. The underlying mechanism consists in a combination of glide and climb motion of the original dislocations bound to the PHD. We demonstrate that the pentalines play an important role within the transition from hexagonal towards square convection cells, observed in surface-tension-driven Bénard convection.
We investigate magnetic properties of Mott-insulating phases of ultracold
Bose and Fermi spinor gases in optical lattices. We consider in particular the
F=2 Bose gas, and the F=3/2 and F=5/2 Fermi ...gases. We derive effective spin
Hamiltonians for one and two atoms per site and discuss the possibilities of
manipulating the magnetic properties of the system using optical Feshbach
resonances. We discuss low temperature quantum phases of a 87Rb gas in the F=2
hyperfine state, as well as possible realizations of high spin Fermi gases with
either 6Li or 132Cs atoms in the F=3/2 state, and with 173Yb atoms in the F=5/2
state.
Thirty-six operators of small board and care homes were interviewed to explore how they conceptualize the care that they provide to frail, elderly persons. The meanings these operators attach to the ...care they provide reveal, through stories of “why” and “how” they provide care, both shared meanings and dimensions of difference in how they view their work. A range of motivations (the “why” of care), from altruism to economics, combine with varied styles of service delivery (the “how” of care), from full domestic integration to separate domains, to create a typology of meanings in this form of residential care. Implications of these dimensions for quality of care and social policy are derived from this typology.
