Robert Grayson Littlejohn

Robert Grayson Littlejohn's AcademicInfluence.com Rankings

Physics

#4230

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#5847

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Physics

Robert Grayson Littlejohn's Degrees

Masters Physics Stanford University

Why Is Robert Grayson Littlejohn Influential?

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According to Wikipedia, Robert Grayson Littlejohn is an American physicist, professor emeritus at the University of California, Berkeley. Littlejohn completed a bachelor's degree and doctorate in physics at Berkeley, in 1975 and 1980, respectively. He then served as a post-doctoral researcher at the La Jolla Institute and the University of California, Los Angeles before returning to teach at Berkeley in 1983. He retired in 2018.

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Robert Grayson Littlejohn's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Variational principles of guiding centre motion (1983) (532)
The semiclassical evolution of wave packets (1986) (490)
Gauge fields in the separation of rotations and internal motions in the n-body problem (1997) (309)
Noncanonical Hamiltonian mechanics and its application to magnetic field line flow (1983) (308)
Hamiltonian formulation of guiding center motion (1981) (232)
A guiding center Hamiltonian: A new approach (1979) (201)
Hamiltonian perturbation theory in noncanonical coordinates (1982) (169)
A general framework for discrete variable representation basis sets (2002) (116)
The Van Vleck formula, Maslov theory, and phase space geometry (1992) (108)
Generalized Gaussian wave packet dynamics, Schrödinger equation, and stationary phase approximation (1988) (84)
Non-generic spectral statistics in the quantized stadium billiard (1993) (77)
Semiclassical mechanics of the Wigner 6j-symbol (2010) (61)
Semiclassical structure of trace formulas (1990) (51)
Body frames and frame singularities for three-atom systems (1998) (48)
Differential forms and canonical variables for drift motion in toroidal geometry (1985) (47)
Semiclassical trace formulae for systems with non-Abelian symmetry (1992) (47)
INTERNAL SPACES, KINEMATIC ROTATIONS, AND BODY FRAMES FOR FOUR-ATOM SYSTEMS (1998) (47)
Linear relativistic gyrokinetic equation (1984) (44)
Relativistic ponderomotive Hamiltonian (1984) (42)
Semiclassical analysis of Wigner 3j-symbol (2007) (40)
Singular Poisson tensors (1982) (37)
Hyperspherical harmonics for polyatomic systems: basis set for collective motions (2004) (36)
Corrections to classical radiometry (1993) (35)
Quantum dynamics of kinematic invariants in tetra- and polyatomic systems (1998) (34)
Hyperspherical harmonics for polyatomic systems: Basis set for kinematic rotations (2002) (34)
Collective hyperspherical coordinates for polyatomic molecules and clusters (2000) (33)
HAMILTONIAN THEORY OF PONDEROMOTIVE EFFECTS OF AN ELECTROMAGNETIC WAVE IN A NONUNIFORM MAGNETIC FIELD (1979) (32)
Uniform semiclassical approximation for the Wigner 6j-symbol in terms of rotation matrices. (2009) (29)
Exact Computation and Asymptotic Approximations of 6j Symbols: Illustration of Their Semiclassical Limits (2010) (28)
Hamiltonian Theory of Guiding Center Bounce Motion (1982) (27)
Asymptotics of the Wigner 9j-symbol (2009) (26)
Kinematic orbits and the structure of the internal space for systems of five or more bodies (1999) (26)
Normal forms for linear mode conversion and Landau-Zener transitions in one dimension (1994) (25)
Quantum normal forms, Moyal star product and Bohr–Sommerfeld approximation (2005) (24)
HAMILTONIAN THEORY OF GUIDING CENTER MOTION (1980) (24)
Scars in billiards : the phase space approach (1990) (24)
Generalized radiance and measurement (1995) (24)
Bessel discrete variable representation bases (2002) (23)
Multidimensional discrete variable representation bases: Sinc functions and group theory (2002) (22)
Phase integral theory, coupled wave equations, and mode conversion. (1992) (21)
Semiclassical analysis of the Wigner 9j symbol with small and large angular momenta (2011) (21)
The Screen Representation of Spin Networks: Images of 6j Symbols and Semiclassical Features (2013) (19)
GEOMETRY AND GUIDING CENTER MOTION (1983) (19)
Gauge Theory of Small Vibrations in Polyatomic Molecules (2002) (15)
The Screen Representation of Vector Coupling Coefficients or Wigner 3j Symbols: Exact Computation and Illustration of the Asymptotic Behavior (2014) (15)
A nonlocal analysis of drift and drift‐cyclotron waves in cylindrical geometry (1985) (15)
Symplectic and semiclassical aspects of the Schläfli identity (2014) (15)
Tetrahedrally invariant discrete variable representation basis on the sphere (2002) (14)
Phase space deformation and basis set optimization. (2002) (13)
Nonlocal effects on the drift cyclotron loss cone dispersion relation in cylindrical geometry (1987) (11)
Maslov indices, Poisson brackets, and singular differential forms (2014) (10)
Boundary conditions on internal three-body wave functions (1999) (10)
The rovibrational kinetic energy for complexes of rigid molecules (1998) (8)
Derivation of planar three-body hyperspherical harmonics from monopole harmonics (1997) (8)
Hamiltonian structure of particle motion in an ideal helical wiggler with guide field (1987) (7)
Measuring the instrument function of radiometers (1997) (7)
The measurement of radiance and the van Cittert–Zernike Theorem (2002) (7)
An Airy discrete variable representation basis (2002) (7)
A phase-space semiclassical approach for modeling nonadiabatic nuclear dynamics with electronic spin. (2022) (6)
Modeling Spin-Dependent Nonadiabatic Dynamics with Electronic Degeneracy: A Phase-Space Surface-Hopping Method. (2022) (5)
Combinatorial and Geometrical Origins of Regge Symmetries: Their Manifestations from Spin-Networks to Classical Mechanisms, and Beyond (2017) (5)
Radial localization of drift cone and ion cyclotron loss cone modes (1988) (4)
GAUGE FIELDS IN THE SEPARATION OF ROTATIONS AND INTERNAL MOTIONS IN THE (n + l)-BODY PROBLEM (1994) (3)
Geometry, Symmetry and Mechanics, I (2001) (3)
Semiclassical generalization of the Darboux–Christoffel formula (2002) (3)
Asymptotics of the Wigner 9 j-Symbol (2010) (3)
Entropy and emittance of particle and photon beams (1995) (2)
RF heating of the ionosphere: An example of generic linear mode conversion (2008) (2)
Manipulating the generalized radiance and measuring the instrument function (1997) (1)
Multidimensional quantum normal forms, Moyal star product, and torus quantization (2005) (1)
Hannay's Angle and Berry's Phase in the Classical Adiabatic Motion of Charged Particles a (1988) (1)
The parallel-transported (quasi)-diabatic basis. (2022) (1)
CONICAL INTERSECTIONS, LIGHT CONES, AND MODE CONVERSION (2010) (1)
The Lippmann-Schwinger Equation and Formal Scattering Theory † 1 (2018) (1)
A Pedestrian's Guide to Lie Transforms: A New Approach to Peturbation Theory in Classical Mechanics (1978) (1)
Lawrence Berkeley National Laboratory Recent Work Title Entropy and Emittance of Particle and Photon Beam Permalink (2013) (0)
Representation and conservation of angular momentum in the Born-Oppenheimer theory of polyatomic molecules. (2023) (0)
The Hartree-Fock Method in Atoms † 1 (2019) (0)
Hamiltonian and Lagrangian Theory of Gyrokinetic Equations (1984) (0)
Theory, in Symmetries and Properties of Non-Rigid Molecules: A Comprehensive (0)
Wave packets, Maslov indices, and semiclassical quantization (1989) (0)
Submitted to Physics of Fluids A HAMILTONIAN FORMULATION OF GUIDING CENTER MOTION (2012) (0)
Moyal star product approach to the Bohr-Sommerfeld approximation. (arXiv:math-ph/0409039v1 CROSS LISTED) (2004) (0)
Quantum n-Body Problem (2006) (0)
Lawrence Berkeley National Laboratory Recent Work Title A HAMILTONIAN FORMULATION OF GUIDING CENTER MOTION Permalink (2012) (0)
Gauge Theory of Rotations and Internal Motions in the n-body Problem (1996) (0)
earth-moon system is heading toward a state in which the length of the day and the length of the month (2016) (0)
Quantum Charged Spinning Particles in a Strong Magnetic Field ( a Quantal Guiding Center Theory ) (1996) (0)
Global Guiding Center Hamiltonian for Nonuniform Magnetostatic Field and Electromagnetic Perturbations (1979) (0)
Lawrence Berkeley National Laboratory Recent Work Title Quantum and semiclassical approaches to chemical reaction dynamics Permalink (2013) (0)
Charged particle motion in spherically symmetric distributions of magnetic monopoles (2022) (0)
Measuring radiance and the van-Cittert-Zernicke theorem (In memory of Vladimir Medvedev, formerly a member of the Vavilov Optical Science Institute, St. Petersburg [Leningrad], Russia) (2001) (0)
Total Angular Momentum Conservation in Ab Initio Born-Oppenheimer Molecular Dynamics (2023) (0)
Multisymplectic Geometry with Boundaries By Eugene Kur A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Physics (2018) (0)
31p-A9-13 EFFECT OF NONLOCALITY ON DCLC INSTABILITY IN CYLINDRICAL GEOMETRY (1985) (0)
Wave packets and WKB theory in phase space (1986) (0)
Measuring generalized radiance and instrument functions (1994) (0)
Radiance aa a paradigm for a wave description of optical measurements (2004) (0)

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Robert Grayson Littlejohn's Academic­Influence.com Rankings