12,095 research outputs found
Convergent Iterative Solutions of Schroedinger Equation for a Generalized Double Well Potential
We present an explicit convergent iterative solution for the lowest energy
state of the Schroedinger equation with a generalized double well potential
. The condition for the convergence of the
iteration procedure and the dependence of the shape of the groundstate wave
function on the parameter are discussed.Comment: 23 pages, 7 figure
Iterative Solutions for Low Lying Excited States of a Class of Schroedinger Equation
The convergent iterative procedure for solving the groundstate Schroedinger
equation is extended to derive the excitation energy and the wave function of
the low-lying excited states. The method is applied to the one-dimensional
quartic potential problem. The results show that the iterative solution
converges rapidly when the coupling is not too small.Comment: 14 pages, 4 figure
The Effect of Old Age Assistance on Retirement
Researchers have devoted considerable attention to analyzing the impact of Social Security on retirement, with mixed findings. However, Old Age Assistance (OAA), a means-tested program established at the same time, dwarfed Social Security until the 1950s and coincided with the early decline in elderly participation. In addition, OAA benefit levels were determined by the states - a key source of policy variation that is missing in the case of Social Security. I estimate the relationship between OAA benefit levels and elderly labor force participation using individual data from the 1940 and 1950 Censuses. The effect of OAA is found to be strong and implies that participation would have risen slightly instead of falling if benefits had not been raised during the 1940s. I also present evidence against the endogeneity of state benefit levels.
The Impact of Technological Change on Older Workers: Evidence from Data on Computer Use
New technologies like computers alter skill requirements. This paper explores two related effects of computers on older workers, who use computers less. The evolution of computer use in the Current Population Survey suggests that impending retirement reduces the incentive of older workers to acquire new skills. The Health and Retirement Study shows, further, that computer users retire later than non-users. This may arise because computer users choose to retire later and also because workers planning later retirement choose to acquire computer skills. Instrumental variables estimates suggest that computer use directly lowers the probability of retirement.
Eisenstein Series on Covers of Odd Orthogonal Groups
We study the Whittaker coefficients of the minimal parabolic Eisenstein
series on the -fold cover of the split odd orthogonal group . If
the degree of the cover is odd, then Beineke, Brubaker and Frechette have
conjectured that the -power contributions to the Whittaker coefficients may
be computed using the theory of crystal graphs of type C, by attaching to each
path component a Gauss sum or a degenerate Gauss sum depending on the fine
structure of the path. We establish their conjecture using a combination of
automorphic and combinatorial-representation-theoretic methods. Surprisingly,
we must make use of the type A theory, and the two different crystal graph
descriptions of Brubaker, Bump and Friedberg available for type A based on
different factorizations of the long word into simple reflections. We also
establish a formula for the Whittaker coefficients in the even degree cover
case, again based on crystal graphs of type C. As a further consequence, we
establish a Lie-theoretic description of the coefficients for sufficiently
large, thereby confirming a conjecture of Brubaker, Bump and Friedberg.Comment: 62 page
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