Gregory Ezra

Gregory Ezra was born in London, England. He received his undergraduate and graduate degrees in chemistry from Oxford University. After obtaining his D.Phil. degree in 1980 with P. W. Atkins, he went to the University of Chicago as a NATO Postdoctoral Fellow to work with R. S. Berry. He then joined the Chemistry Department at Cornell University, where he is now a Professor. Dr. Ezra has received Sloan and Dreyfus fellowships, and in 1988 was awarded the Medal of the International Academy of Quantum Molecular Science. He is a Fellow of the American Physical Society. He has served on the editorial boards of the Journal of Nonlinear Science and the Journal of Mathematical Chemistry, and is a member of the graduate field of Applied Mathematics at Cornell. Dr. Ezra's research covers many aspects of the few-body problem in chemistry and physics. He is interested in the role of symmetry in physical problems, in classical, semiclassical, and quantum approaches to atomic and molecular systems, and in geometric aspects of Hamiltonian and non-Hamiltonian dynamics.

Biography Updated on 15 February 2008

Personal Home Page

http://www.chem.cornell.edu/faculty/index.asp?fac=27

Articles in Scholarly Journals [Incomplete List]

  1. Fragmentation kinetics of a Morse oscillator chain under tension
    Chemical Physics, vol. 337, no. 1-3, pp. 11–32, 2007
  2. Quantum state reconstruction for rigid rotors
    Chemical Physics Letters, vol. 440, no. 4-6, pp. 341–347, 2007
  3. Semiclassical IVR approach to rotational excitation of non-polar diatomic molecules by non-resonant laser pulses
    Chemical Physics Letters, vol. 420, no. 4-6, pp. 296–303, 2006
  4. Reversible measure-preserving integrators for non-Hamiltonian systems
    The Journal of Chemical Physics, vol. 125, no. 3, p. 034104, 2006
  5. On the derivation of the Herman–Kluk propagator
    Journal of Physics A: Mathematical and General, vol. 39, no. 18, pp. 5067–5078, 2006
  6. Classical and quantum mechanics of diatomic molecules in tilted fields
    The Journal of Chemical Physics, vol. 122, no. 18, p. 184303, 2005
  7. Semiclassical calculation of the vibrational echo
    The Journal of Chemical Physics, vol. 120, no. 3, p. 1491, 2004
  8. On the Statistical Mechanics of Non-Hamiltonian Systems: The Generalized Liouville Equation, Entropy, and Time-Dependent Metrics
    Journal of Mathematical Chemistry, vol. 35, no. 1, pp. 29–53, 2004
  9. Quantum monodromy for diatomic molecules in combined electrostatic and pulsed nonresonant laser fields
    Chemical Physics Letters, vol. 392, no. 4-6, pp. 486–492, 2004
  10. The Journal of Physical Chemistry B, vol. 108, no. 21, pp. 6536–6543, 2004
  11. Optical response functions with semiclassical dynamics
    The Journal of Chemical Physics, vol. 119, no. 2, p. 1003, 2003
  12. Journal of Mathematical Chemistry, vol. 32, no. 4, pp. 339–360, 2002
  13. Global analysis of periodic orbit bifurcations in coupled Morse oscillator systems: time-reversal symmetry, permutational representations and codimension-2 collisions
    Chaos: An Interdisciplinary Journal of Nonlinear Science, vol. 9, no. 4, p. 819, 1999
  14. Comment on “Local frequency analysis and the structure of classical phase space of the LiNC/LiCN molecular system” [J. Chem. Phys. 108, 63 (1998)]
    The Journal of Chemical Physics, vol. 109, no. 15, p. 6507, 1998
  15. Eigenstate assignments and the quantum-classical correspondence for highly-excited vibrational states of the Baggot H[sub 2]O Hamiltonian
    The Journal of Chemical Physics, vol. 107, no. 1, p. 156, 1997
  16. Uniform regularized semiclassical propagator for the x^{-2} potential
    Physical Review A, vol. 53, no. 2, pp. 661–668, 1996
  17. Assigning vibrational spectra of highly excited molecules: classical and quantum vibrational dynamics of the H2O molecule
    Chemical Physics Letters, vol. 259, no. 1-2, pp. 81–90, 1996
  18. Journal of Physical Chemistry, vol. 99, no. 9, pp. 2435–2443, 1995
  19. Quantum-classical correspondence and the transition to chaos in coupled quartic oscillators
    Physical Review E, vol. 51, no. 3, pp. 1822–1837, 1995
  20. Periodic orbit analysis of molecular vibrational spectra: 1:1 resonant coupled modes
    The Journal of Chemical Physics, vol. 103, no. 4, p. 1375, 1995
  21. Semiclassical density of states at symmetric pitchfork bifurcations in coupled quartic oscillators
    Physical Review A, vol. 50, no. 1, pp. 93–97, 1994
  22. Regularized semiclassical radial propagator for the Coulomb potential
    Physical Review A, vol. 50, no. 2, pp. 954–966, 1994
  23. Vibrational deactivation in Kr/O2+ collisions: Role of complex formation and potential anisotropy
    The Journal of Chemical Physics, vol. 97, no. 9, p. 6322, 1992
  24. Vibrationally induced rotational axis switching: A novel mechanism for vibrational mode coupling
    The Journal of Chemical Physics, vol. 97, no. 9, p. 5956, 1992
  25. Transport and turnstiles in multidimensional Hamiltonian mappings for unimolecular fragmentation: Application to van der Waals predissociation
    The Journal of Chemical Physics, vol. 94, no. 4, p. 2648, 1991
  26. Journal of Physical Chemistry, vol. 94, no. 10, pp. 3995–4000, 1990
  27. Journal of Physical Chemistry, vol. 93, no. 10, pp. 3877–3880, 1989
  28. Avoided crossings and resummation of nearly resonant molecular vibrations: Reconstruction of an effective secular equation
    The Journal of Chemical Physics, vol. 90, no. 11, p. 6378, 1989
  29. Sensitivity of intramolecular vibrational energy relaxation to stretch–bend potential energy coupling and stability of periodic orbits
    The Journal of Chemical Physics, vol. 89, no. 2, p. 801, 1988
  30. General discussion
    Journal of the Chemical Society, Faraday Transactions 2, vol. 84, no. 9, p. 1555, 1988
  31. Generalized algebraic quantization: corrections to arbitrary order in Planck's constant
    Journal of Physical Chemistry, vol. 92, no. 11, pp. 3144–3154, 1988
  32. Journal of Physical Chemistry, vol. 92, no. 26, pp. 7193–7204, 1988
  33. Journal of Physical Chemistry, vol. 91, no. 14, pp. 3721–3730, 1987
  34. Semiclassical quantization using classical perturbation theory: Algebraic quantization of multidimensional systems
    The Journal of Chemical Physics, vol. 86, no. 11, p. 6270, 1987
  35. Classical and semiclassical mechanics of strongly resonant systems: A Fourier transform approach
    The Journal of Chemical Physics, vol. 86, no. 1, p. 279, 1987
  36. Semiclassical vibrational energies and transition frequencies for a Hamiltonian with stretch–bend potential energy coupling: Application of Fourier methods
    The Journal of Chemical Physics, vol. 87, no. 11, p. 6609, 1987
  37. Classical, quantum mechanical, and semiclassical representations of resonant dynamics: A unified treatment
    The Journal of Chemical Physics, vol. 87, no. 1, p. 284, 1987
  38. Nonadiabatic interactions in the photodissociation of ICN
    The Journal of Chemical Physics, vol. 84, no. 6, p. 3120, 1986
  39. Calculation of rovibrational spectra of water by means of particles-on-concentric-spheres models. II. Excited states of stretching vibrations
    The Journal of Chemical Physics, vol. 84, no. 4, p. 2035, 1986
  40. Semiclassical quantization of a classical analog for the Jahn–Teller E×e system
    The Journal of Chemical Physics, vol. 85, no. 4, p. 2089, 1986
  41. Erratum: Calculations of rovibrational spectra of water by means of particles-on-concentric-spheres models. II. Excited states of stretching vibrations [J. Chem. Phys. 84, 2035 (1986)]
    The Journal of Chemical Physics, vol. 85, no. 5, p. 3139, 1986
  42. EBK quantization of nonseparable systems: A Fourier transform method
    The Journal of Chemical Physics, vol. 83, no. 6, p. 2990, 1985
  43. Intramolecular dynamics and multiresonant absorption spectroscopy. II. Power broadening and superposition states in double resonant two-photon excitation
    The Journal of Chemical Physics, vol. 83, no. 11, p. 5369, 1985
  44. The effect of CDAA (N,N,-diallyl-2-chloroacetamide) pretreatments on subsequent CDAA injury to corn (Zea mays L.)
    Pesticide Biochemistry and Physiology, vol. 23, no. 1, pp. 108–115, 1985
  45. Comparative metabolism of atrazine and EPTC in proso millet (Panicum miliaceum L.) and corn
    Pesticide Biochemistry and Physiology, vol. 24, no. 2, pp. 207–212, 1985
  46. Journal of Physical Chemistry, vol. 88, no. 7, pp. 1273–1275, 1984
  47. Calculation of rovibrational spectra of water by means of particles-on-concentric-spheres models. I. Ground stretching vibrational state
    The Journal of Chemical Physics, vol. 81, no. 8, p. 3400, 1984
  48. Comment on "Classification of Doubly Excited States of Two-Electron Atoms"
    Physical Review Letters, vol. 52, no. 14, pp. 1252–1252, 1984
  49. Collective and independent-particle motion in doubly excited two-electron atoms
    Physical Review A, vol. 28, no. 4, pp. 1974–1988, 1983
  50. Quantum states of two particles on concentric spheres
    Physical Review A, vol. 28, no. 4, pp. 1989–2000, 1983
  51. Effects of the herbicide EPTC and the protectant DDCA on incorporation and distribution of 62-14C9acetate into major lipid fractions of maize cell suspension cultures
    Pesticide Biochemistry and Physiology, vol. 19, no. 3, pp. 225–234, 1983
  52. Competition between a thiocarbamate herbicide and herbicide protectants at the level of uptake into maize cells in culture
    Pesticide Biochemistry and Physiology, vol. 18, no. 1, pp. 107–112, 1982
  53. Correlation diagrams for rigid and nonrigid five-body and XY5 six-body systems
    The Journal of Chemical Physics, vol. 76, no. 7, p. 3679, 1982
  54. Correlation of two particles on a sphere
    Physical Review A, vol. 25, no. 3, pp. 1513–1527, 1982
  55. Electron Correlation and Kellman-Herrick Quantization in Doubly Excited Helium
    Physical Review Letters, vol. 47, no. 7, pp. 497–500, 1981