3,643 research outputs found
Public Economic Benefits of Reducing Salinity Discharges: Evidence from California’s San Joaquin Valley
Environmental Economics and Policy,
Controlling electron-electron correlation in frustrated double ionization of molecules with orthogonally polarized two-color laser fields
We demonstrate the control of electron-electron correlation in frustrated
double ionization (FDI) of the two-electron triatomic molecule D when
driven by two orthogonally polarized two-color laser fields. We employ a
three-dimensional semi-classical model that fully accounts for the electron and
nuclear motion in strong fields. We analyze the FDI probability and the
distribution of the momentum of the escaping electron along the polarization
direction of the longer wavelength and more intense laser field. These
observables when considered in conjunction bear clear signatures of the
prevalence or absence of electron-electron correlation in FDI, depending on the
time-delay between the two laser pulses. We find that D is a better
candidate compared to H for demonstrating also experimentally that
electron-electron correlation indeed underlies FDI.Comment: 5 pages, 4 figure
The uniqueness of the invariant polarisation-tensor field for spin-1 particles in storage rings
We argue that the invariant tensor field introduced in [1] is unique under
the condition that the invariant spin field is unique, and thereby complete
that part of the discussion in that paper.Comment: 8 page
Better Higgs-CP Tests Through Information Geometry
Measuring the CP symmetry in the Higgs sector is one of the key tasks of the
LHC and a crucial ingredient for precision studies, for example in the language
of effective Lagrangians. We systematically analyze which LHC signatures offer
dedicated CP measurements in the Higgs-gauge sector, and discuss the nature of
the information they provide. Based on the Fisher information measure, we
compare the maximal reach for CP-violating effects in weak boson fusion,
associated ZH production, and Higgs decays into four leptons. We find a subtle
balance between more theory-independent approaches and more powerful analysis
channels, indicating that rigorous evidence for CP violation in the Higgs-gauge
sector will likely require a multi-step process.Comment: 27 pages, 8 figure
Conflict Resolution and Anger Management
An applied project submitted in partial fulfillment of the requirements for the degree of Education Specialist at Morehead State University by Lori M. Kling on September 11, 2000
A case study of random field models applied to thin-walled composite cylinders in finite element analysis
Slingshot non-sequential double ionization as a gate to anti-correlated two electron escape
At intensities below-the-recollision threshold, we show that
re-collision-induced excitation with one electron escaping fast after
re-collision and the other electron escaping with a time delay via a Coulomb
slingshot motion is one of the most important mechanisms of non-sequential
double ionization, for strongly-driven He at 400 nm. Slingshot-NSDI is a
general mechanism present for a wide range of low intensities and pulse
durations. Anti-correlated two-electron escape is its striking hallmark. This
mechanism offers an alternative explanation of anti-correlated two-electron
escape obtained in previous studies.Comment: 6 pages, 3 figure
Nanoplasmonic near-field synthesis
The temporal response of resonances in nanoplasmonic structures typically
converts an incoming few-cycle field into a much longer near-field at the spot
where non-linear physical phenomena including electron emission, recollision
and high-harmonic generation can take place. We show that for practically
useful structures pulse shaping of the incoming pulse can be used to synthesize
the plasmon-enhanced field and enable single-cycle driven nonlinear physical
phenomena. Our method is demonstrated for the generation of an isolated
attosecond pulse by plasmon-enhanced high harmonic generation. We furthermore
show that optimal control techniques can be used even if the response of the
plasmonic structure is not known a priori.Comment: 6 page
Steering proton migration in hydrocarbons using intense few-cycle laser fields
Proton migration is a ubiquitous process in chemical reactions related to
biology, combustion, and catalysis. Thus, the ability to control the movement
of nuclei with tailored light, within a hydrocarbon molecule holds promise for
far-reaching applications. Here, we demonstrate the steering of hydrogen
migration in simple hydrocarbons, namely acetylene and allene, using
waveform-controlled, few-cycle laser pulses. The rearrangement dynamics are
monitored using coincident 3D momentum imaging spectroscopy, and described with
a quantum-dynamical model. Our observations reveal that the underlying control
mechanism is due to the manipulation of the phases in a vibrational wavepacket
by the intense off-resonant laser field.Comment: 5 pages, 4 figure
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