2,457 research outputs found
A theology of community
https://place.asburyseminary.edu/ecommonsatsdissertations/2036/thumbnail.jp
Commandeering and Constitutional Change
Coming in the midst of the Rehnquist Court’s federalism revolution, Printz v. United States held that federal commandeering of state executive officers is “fundamentally incompatible with our constitutional system of dual sovereignty.” The Printz majority’s discussion of historical evidence, however, inverted Founding-era perspectives. When Federalists such as Alexander Hamilton endorsed commandeering during the ratification debates, they were not seeking to expand federal power. Quite the opposite. The Federalists capitulated to states’ rights advocates who had recently rejected a continental impost tax because Hamilton, among others, insisted on hiring federal collectors rather than commandeering state collectors. The commandeering power, it turns out, was an integral aspect of the Anti-Federalist agenda because it facilitated federal use of state and local officers, thus ensuring greater local control over federal law enforcement and averting the need for a bloated federal bureaucracy. These priorities carried over into the First Congress, where Anti-Federalists were among the most vehement defenders of the federal power to commandeer state executive and judicial officers. Ironically, though understandably when viewed in context, it was Federalists who first planted the seeds of the anticommandeering doctrine. Incorporating recently uncovered sources and new interpretations, this Article aims to significantly revise our understanding of Founding-era attitudes toward federal commandeering of state officers. Moreover, the Article explains why early Congresses generally shunned the use of state officers and how this custom combined with shifting political priorities to quickly erode what once had been a strong consensus favoring commandeering’s constitutionality
Spectroscopy of a synthetic trapped ion qubit
has been identified as an attractive ion for quantum
information processing due to the unique combination of its spin-1/2 nucleus
and visible wavelength electronic transitions. Using a microgram source of
radioactive material, we trap and laser-cool the synthetic = 133
radioisotope of barium II in a radio-frequency ion trap. Using the same, single
trapped atom, we measure the isotope shifts and hyperfine structure of the and
electronic transitions that are needed
for laser cooling, state preparation, and state detection of the clock-state
hyperfine and optical qubits. We also report the
electronic transition isotope shift for
the rare = 130 and 132 barium nuclides, completing the spectroscopic
characterization necessary for laser cooling all long-lived barium II isotopes
Displacement operators: the classical face of their quantum phase
In quantum mechanics, the operator representing the displacement of a system
in position or momentum is always accompanied by a path-dependent phase factor.
In particular, two non-parallel displacements in phase space do not compose
together in a simple way, and the order of these displacements leads to
different displacement composition phase factors. These phase factors are often
attributed to the nonzero commutator between quantum position and momentum
operators, but such a mathematical explanation might be unsatisfactory to
students who are after more physical insight. We present a couple of simple
demonstrations, using classical wave mechanics and classical particle
mechanics, that provide some physical intuition for the phase associated with
displacement operators.Comment: 14 pages, 4 figures, reorganized and reformatte
Time-Domain Measurement of Spontaneous Vibrational Decay of Magnetically Trapped NH
The v = 1 -> 0 radiative lifetime of NH (X triplet-Sigma-, v=1,N=0) is
determined to be tau_rad,exp. = 37.0 +/- 0.5 stat +2.0 / -0.8 sys miliseconds,
corresponding to a transition dipole moment of |mu_10| = 0.0540 + 0.0009 /
-0.0018 Debye. To achieve the long observation times necessary for direct
time-domain measurement, vibrationally excited NH (X triplet-Sigma-, v=1,N=0)
radicals are magnetically trapped using helium buffer-gas loading. Simultaneous
trapping and lifetime measurement of both the NH(v=1, N=0) and NH(v=0,N=0)
populations allows for accurate extraction of tau_rad,exp. Background helium
atoms are present during our measurement of tau_rad,exp., and the rate constant
for helium atom induced collisional quenching of NH(v=1,N=0) was determined to
be k_q < 3.9 * 10^-15 cm^3/s. This bound on k_q yields the quoted systematic
uncertainty on tau_rad,exp. Using an ab initio dipole moment function and an
RKR potential, we also determine a theoretical value of 36.99 ms for this
lifetime, in agreement with our experimental value. Our results provide an
independent determination of tau_rad,10, test molecular theory, and furthermore
demonstrate the efficacy of buffer-gas loading and trapping in determining
metastable radiative and collisional lifetimes.Comment: 10 pages + 3 figures (11 pages total) v2 has minor corrections and
explanations accepted for publication in PR
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