Browsing Physics by Issue Date

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  • Kostelecký, V.A.; Nieto, M.M. (American Physical Society, 1984)
    We show that supersymmetric quantum mechanics may be used to interrelate the spectra of different atoms and ions. This supersymmetry is broken by electron-electron interactions.
  • Kostelecký, V.A.; Nieto, M.M. (American Physical Society, 1985)
    We present an exactly solvable effective potential that reproduces atomic spectra in the limit of exact quantum-defect theory, i.e., the limit in which, for a fixed l, the principal quantum number is modified by a constant: ...
  • Kostelecký, V.A.; Nieto, M.M. (American Physical Society, 1985)
    We review the proposal that relationships between physical spectra of certain atoms can be considered as evidence for a phenomenological supersymmetry. Next, a comparison is made between the supersymmetric and the hydrogenic ...
  • Kostelecký, V.A.; Nieto, M.M.; Truax, D.R. (American Physical Society, 1985)
    We construct the relationship between the radial equations of the $d$-dimensional hydrogen atom and the $D$-dimensional simple harmonic oscillator. The supersymmetric partners of each of these systems are obtained, and a ...
  • Hughes, R.J.; Kostelecký, V.A.; Nieto, M.M. (American Physical Society, 1986)
    We demonstrate the realization of supersymmetric quantum mechanics in the standard first-order Dirac equation describing a massless Dirac particle in a magnetic field. This system is relevant to the integer quantum Hall ...
  • Kostelecký, V.A.; Nieto, M.M. (American Physical Society, 1986)
    A reply to the comment on evidence for a phenomenological supersymmetr in atomic physics is presented.
  • Kostelecký, V.A.; Lechtenfeld, O. (American Physical Society, 1987)
    A Lorentzian algebra is constructed that underlies the covariant formulation of the spinning string. It is a simply laced hyperbolic Kac-Moody algebra having a realization on the ghost-extended spectrum of string states. ...
  • Kostelecký, V.A.; Nieto, M.M.; Truax, D.R. (American Physical Society, 1988)
    We investigate the domain of validity of previously proposed analytical wave functions for atomic quantum-defect theory. This is done by considering the fine-structure splitting of alkali-metal and singly ionized alkaline-earth ...
  • Branco, G.C.; Kostelecký, V.A. (American Physical Society, 1989)
    For supersymmetric extensions of the standard model, we obtain necessary conditions for $CP$ invariance expressed in terms of weak-basis invariants. Among other applications, these conditions allow a simple identification ...
  • Kostelecký, V.A.; Samuel, S. (American Physical Society, 1989)
    We investigate gravitational phenomenology in compactified higher-dimensional theories, with particular emphasis on the consequences in string theory of tensor-induced spontaneous Lorentz-symmetry breaking. The role played ...
  • Kostelecký, V.A.; Samuel, S. (American Physical Society, 1989)
    We investigate measurable gravitational and cosmological effects in four dimensions that can arise from the compactification of higher-dimensional theories incorporating gravity. We identify the nature of effects due to ...
  • Corvi, M.; Kostelecký, V.A.; Moxhay, P. (American Physical Society, 1989)
    Superstrings with critical dimension two and two real bosonic spacetime coordinates may serve as useful toy models for the study of string properties. We present details of several such toy superstrings including open, ...
  • Kostelecký, V.A.; Samuel, S. (American Physical Society, 1989)
    The possibility of spontaneous breakdown of Lorentz symmetry in string theory is explored via covariant string field theory. A potential mechanism is suggested for the Lorentz breaking that may be generic in many string theories.
  • Kostelecký, V.A.; Samuel, S. (American Physical Society, 1990)
    A second-quantized analysis is performed to examine many-body phenomena in closed bosonic strings. The covariant nonpolynomial closed-string field theory is developed in terms of particle fields and shown to contain ...
  • Kostelecký, V.A.; Nieto, M.M.; Truax, D.R. (American Physical Society, 1990)
    The preceding Comment by Goodfriend [Phys. Rev. A 41, 1730 (1990)] contains three criticisms of our model for analytical quantum-defect wave functions vis-á-vis the atomic Fues potential of Simons [J. Phys. Chem. 55, 756 ...
  • Kostelecký, V.A.; Samuel, S. (American Physical Society, 1990)
    We use covariant string field theory to explore many-body string physics. A candidate nonperturbative vacuum is identified via a level-truncation scheme. The breaking of internal and Lorentz symmetries is investigated. We ...
  • Fatyga, B.W.; Kostelecký, V.A.; Nieto, M.M.; Truax, D.R. (American Physical Society, 1991)
    A general approach is presented for constructing coherent states for supersymmetric systems. It uses Rogers's supermanifold formulation of supergroups to extend the group-theoretic method. Supercoherent states are explicitly ...
  • Kostelecký, V.A.; Nieto, M.M. (American Physical Society, 1991)
    The preceding paper, by Martin and Barrientos [Phys. Rev. A 43, 4061 (1991)], comments on our supersymmetry-inspired model of atomic physics. We relate this to other Comments [Rau, Phys. Rev. Lett. 56, 95 (1986) and ...
  • Kostelecký, V.A.; Samuel, S. (American Physical Society, 1991)
    We show that string theories allow interactions potentially leading to photon and graviton-mass terms when one or more scalar fields acquire vacuum expectation values. A general analysis is presented for the case when one ...
  • Bluhm, R.; Kostelecký, V.A. (American Physical Society, 1993)
    A search is conducted for physical quantum-mechanical supersymmetries involving the hydrogen atom. In all coordinate systems admitting a direct separation of the Schrödinger equation, the structure of the separated equations ...

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