5,588 research outputs found
Correlations in hypernuclear matter
We investigate short range correlations in nuclear and hypernuclear matter.
Self-energies due to short range correlations and their influence on the
nucleon and -hyperon spectral functions are described in an approach
accounting for a realistic treatment of mean-field dynamics and a
self-consistently derived quasi-particle interaction. Landau-Migdal theory is
used to derived the short range interaction from a phenomenological Skyrme
energy density functional, subtracting the long range pionic contributions to
the nucleonic spectral functions. We discuss our results for different
hyperon-baryon ratios to show the influence of strangeness on the correlations
in hypernuclear matter.Comment: 7 pages, 5 figures, proceedings for HYP06 in Main
Fractional Talbot effect in phase space: A compact summation formula
A phase space description of the fractional Talbot effect, occurring in a
one-dimensional Fresnel diffraction from a periodic grating, is presented.
Using the phase space formalism a compact summation formula for the Wigner
function at rational multiples of the Talbot distance is derived. The summation
formula shows that the fractional Talbot image in the phase space is generated
by a finite sum of spatially displaced Wigner functions of the source field.Comment: 4 pages, LaTeX. Submitted to Optics Expres
Maintaining Quantum Coherence in the Presence of Noise through State Monitoring
Unsharp POVM measurements allow the estimation and tracking of quantum
wavefunctions in real-time with minimal disruption of the dynamics. Here we
demonstrate that high fidelity state monitoring, and hence quantum control, is
possible even in the presence of classical dephasing and amplitude noise, by
simulating such measurements on a two-level system undergoing Rabi
oscillations. Finite estimation fidelity is found to persist indefinitely long
after the decoherence times set by the noise fields in the absence of
measurement.Comment: 5 pages, 4 figure
Conduction Channels of One-Atom Zinc Contacts
We have determined the transmission coefficients of atomic-sized Zn contacts
using a new type of breakjunction which contains a whisker as a central bridge.
We find that in the last conductance plateau the transport is unexpectedly
dominated by a well-transmitting single conduction channel. We explain the
experimental findings with the help of a tight-binding model which shows that
in an one-atom Zn contact the current proceeds through the 4s and 4p orbitals
of the central atom.Comment: revtex4, 5 pages, 5 figure
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