112,285 research outputs found
Stabilizing Entangled States with Quasi-Local Quantum Dynamical Semigroups
We provide a solution to the problem of determining whether a target pure
state can be asymptotically prepared using dissipative Markovian dynamics under
fixed locality constraints. Beside recovering existing results for a large
class of physically relevant entangled states, our approach has the advantage
of providing an explicit stabilization test solely based on the input state and
constraints of the problem. Connections with the formalism of frustration-free
parent Hamiltonians are discussed, as well as control implementations in terms
of a switching output-feedback law.Comment: 11 pages, no figure
[Review of] John E. Farley. Majority-Minority Relations
John E. Farley, who is on the faculty of Southern Illinois University (Edwardsville), says that he has written this book because he is concerned about the deteriorating status of minorities and intergroup relations in the United States. His main objective is to increase awareness of these issues among college students in race relations classes by not only describing but also analyzing and attempting to explain the problems which our society faces
The correspondence principle in inelastic scattering
Quantum number correspondence principle in inelastic scatterin
Through a Lattice Darkly -- Shedding Light on Electron-Phonon Coupling in the High T Cuprates
With its central role in conventional BCS superconductivity, electron-phonon
coupling has appeared to play a more subtle role in the phase diagram of the
high temperature superconducting cuprates. The added complexity of the cuprates
with potentially numerous competing phases including charge, spin, orbital, and
lattice ordering, makes teasing out any unique phenomena challenging. In this
review, we present our work using angle resolved photoemission spectroscopy
(ARPES) to explore the role of the lattice and its effect on the valence band
electronic structure in the cuprates. We provide an introduction to the ARPES
technique and its unique ability to the probe the effect of bosonic
renormalization (or "kink") on the near-E band structure. Our survey begins
with the establishment of the ubiquitous nodal cuprate kink leading to the way
isotope substitution has shed a critical new perspective on the role and
strength of electron-phonon coupling. We continue with recently published work
on the connection between the phonon dispersion as seen with inelastic x-ray
scattering (IXS) and the location of the kink as observed by ARPES near the
nodal point. Finally, we present very recent and ongoing ARPES work examining
how induced strain through chemical pressure provides a potentially promising
avenue for understanding the broader role of the lattice to the superconducting
phase and larger cuprate phase diagram.Comment: 17 pages, 20 figures, Review Articl
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