3,814 research outputs found
Quantum control of electron--phonon scatterings in artificial atoms
The phonon-induced dephasing dynamics in optically excited semiconductor
quantum dots is studied within the frameworks of the independent Boson model
and optimal control. We show that appropriate tailoring of laser pulses allows
a complete control of the optical excitation despite the phonon dephasing, a
finding in marked contrast to other environment couplings.Comment: to appear in Phys. Rev. Let
Integrated Vertical Bloch Line (VBL) memory
Vertical Bloch Line (VBL) Memory is a recently conceived, integrated, solid state, block access, VLSI memory which offers the potential of 1 Gbit/sq cm areal storage density, data rates of hundreds of megabits/sec, and submillisecond average access time simultaneously at relatively low mass, volume, and power values when compared to alternative technologies. VBLs are micromagnetic structures within magnetic domain walls which can be manipulated using magnetic fields from integrated conductors. The presence or absence of BVL pairs are used to store binary information. At present, efforts are being directed at developing a single chip memory using 25 Mbit/sq cm technology in magnetic garnet material which integrates, at a single operating point, the writing, storage, reading, and amplification functions needed in a memory. The current design architecture, functional elements, and supercomputer simulation results are described which are used to assist the design process
Relativistic calculation of the triton binding energy and its implications
First results for the triton binding energy obtained from the relativistic
spectator or Gross equation are reported. The Dirac structure of the nucleons
is taken into account. Numerical results are presented for a family of
realistic OBE models with off-shell scalar couplings. It is shown that these
off-shell couplings improve both the fits to the two-body data and the
predictions for the binding energy.Comment: 5 pages, RevTeX 3.0, 1 figure (uses epsfig.sty
Gene structure and gene function : in memoriam Lewis John Stadler 1896-1954
"'The gene' is Dr. Stadler's last paper and is reprinted from Science".Digitized 2007 AES.1. The career of Lewis John Stadler / by John R. Laughnan -- 2. Dr. Stadler's contribution to University of Missouri / H.E. Bent -- 3. Gene structure and gene function / by George W. Beadle -- 4. The gene / by L.J. Stadler -- 5. Publications by L.J. Stadler.Includes bibliographical references (pages 36-38, 63-[64], 65-67)
Haplo-viable deficiency in maize.
Publication authorized September 27, 1933.Digitized 2007 AES.Includes bibliographical references (page 29)
Variational Monte Carlo Calculations of H and He with a relativistic Hamiltonian - II
In relativistic Hamiltonians the two-nucleon interaction is expressed as a
sum of , the interaction in the rest frame,
and the ``boost interaction'' which depends upon the
total momentum and vanishes in the rest frame. The
can be regarded as a sum of four terms: , ,
and ; the first three originate from the
relativistic energy-momentum relation, Lorentz contraction and Thomas
precession, while the last is purely quantum. The contributions of and have been previously calculated with the
variational Monte Carlo method for H and He. In this brief note we
report the results of similar calculations for the contributions of and . These are found to be rather small.Comment: 7 pages, P-94-09-07
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