N. Fröman

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Phase-Integral Method: Allowing Nearlying Transition Points

N. Fröman, P. O. Fröman, 2011 .

Stark Effect in a Hydrogenic Atom or Ion: Treated by the Phase-Integral Method with Adjoined Papers by a Hokback and P O Froman

N. Fröman, P. O. Fröman, 2008 .

Physical Problems Solved by the Phase-Integral Method: References

N. Fröman, P. O. Fröman, 2002 .

Physical Problems Solved by the Phase-Integral Method: Historical survey

N. Fröman, P. O. Fröman, 2002 .

Physical Problems Solved by the Phase-Integral Method

N. Fröman, P. O. Fröman, 2002 .

On modifications of phase integral approximations of arbitrary order

N. Fröman, P. O. Fröman, 1974 .

A direct method for modifying certain phase-integral approximations of arbitrary order

N. Fröman, P. O. Fröman, 1974 .

On phase‐integral quantization conditions for bound states in one‐dimensional smooth single‐well potentials

N. Fröman, P. O. Fröman, 1978 .

Calculation of expectation values and matrix elements for symmetric double-well potentials. I. General theory according to phase-integral method

N. Fröman, R. Paulsson, 1985 .

On the quantal treatment of the double-well potential problem by means of certain phase-integral approximations

N. Fröman, P. O. Fröman, R. Paulsson, 1972 .

ON THE HISTORY OF THE SO-CALLED WKB-METHOD FROM 1817 TO 1926

N. Fröman, P. O. Fröman, 1985 .

Relation, expressed in terms of elliptic integrals, for determining characteristic values and characteristic exponents within stable and unstable regions (bands and gaps) associated with the Mathieu potential

N. Fröman, 1981 .

Cluster of Two Simple Transition Zeros

B. Lundborg, N. Fröman, P. O. Fröman, 1996 .

Normalized Wave Function of the Radial Schrödinger Equation Close to the Origin

N. Fröman, P. O. Fröman, S. Linnaeus, 1996 .

Phase-Integral Formulas for the Regular Wave Function When There Are Turning Points Close to a Pole of the Potential

N. Fröman, P. O. Fröman, S. Linnaeus, 1996 .

On the theory of scattering by complex potentials

K. Thylwe, N. Fröman, 1983 .

Quantal Two-Centre Coulomb Problem treated by means of the Phase-Integral Method II. Quantization Conditions in the Symmetric Case Expressed in Terms of Complete Elliptic Integrals. Numerical Illustration

M. Lakshmanan, N. Fröman, N. Athavan, 2000 .

Rotation of a rigid diatomic dipole molecule in a homogeneous electric field: I. Schrödinger equation. Quantization conditions according to phase-integral method

N. Fröman, P. O. Fröman, K. Larsson, 1994, Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences.

On the application of the generalized quantal Bohr-Sommerfeld quantization condition to single-well potentials with very steep walls

N. Fröman, P. O. Fröman, 1978 .

JWKB approximation : contributions to the theory

N. Fröman, P. O. Fröman, Nanny Fröman, 1965 .

Phase-Integral Method

N. Fröman, P. O. Fröman, 1996 .

Phase‐integral calculation of quantal matrix elements without the use of wavefunctions

N. Fröman, P. O. Fröman, 1977 .

A simple formula for calculating quantal expectation values without the use of wave functions

N. Fröman, 1974 .

Semiclassical and Higher-Order Approximations: Properties. Solution of Connection Problems

N. Fröman, 1980 .

Physical Problems Solved by the Phase-Integral Method

N. Fröman, P. O. Fröman, Nanny Fröman, 2002 .

Physical Problems Solved by the Phase-Integral Method: Description of the phase-integral method

N. Fröman, P. O. Fröman, 2002 .

Determination of the potential from experimental data on energies and widths of quasi‐stationary levels

N. Fröman, P. O. Fröman, 1989 .

Phase-integral calculation of quantal matrix elements between unbound states, without the use of wavefunctions

N. Fröman, P. O. Fröman, F. Karlsson, 1979 .

Connection formulas for certain higher order phase-integral approximations

N. Fröman, 1970 .

Transmission through a real potential barrier treated by means of certain phase-integral approximations

N. Fröman, P. O. Fröman, 1970 .

Exact formulas and phase-integral formulas, not involving wavefunctions, for expectation values pertaining to general potentials

N. Fröman, P. O. Fröman, 1985 .

Phase-integral formulas for level densities, normalization factors, and quantal expectation values, not involving wave functions

N. Fröman, 1978 .

On Wentzel’s proof of the quantization condition for a single‐well potential

N. Fröman, P. O. Fröman, 1977 .

Phase-Integral Approximation of Arbitrary Order Generated from an Unspecified Base Function

N. Fröman, P. O. Fröman, 1996 .

On the theory of vibration-rotation interaction

N. Fröman, P. O. Fröman, 1978 .

On the calculation of the probability density at the origin for an s‐state

N. Fröman, 1978 .

Tunneling and super-barrier transmission through a system of two real potential barriers

N. Fröman, Örjan Dammert, 1970 .

Technique of the Comparison Equation Adapted to the Phase-Integral Method

N. Fröman, P. O. Fröman, 1996 .

Problem Involving One Transition Zero

N. Fröman, P. O. Fröman, 1996 .

The Stokes constants for a cluster of transition points

B. Lundborg, N. Fröman, P. O. Fröman, 1988, Mathematical Proceedings of the Cambridge Philosophical Society.

Comments on ’’Higher order modified potentials for the effective phase integral approximation’’

N. Fröman, P. O. Fröman, 1981 .

Comments on a paper concerning the eigenvalues of the rotating harmonic oscillator

N. Fröman, P. O. Fröman, F. Karlsson, 1980 .

Physical Problems Solved by the Phase-Integral Method: Problems with solutions

N. Fröman, P. O. Fröman, 2002 .

JWKB connection-formula problem revisited again via Borel summation

N. Fröman, P. O. Fröman, 1998 .

Black-hole normal modes: Phase-integral treatment.

N. Fröman, P. O. Fröman, Andersson, 1992, Physical review. D, Particles and fields.

Symmetry relations for connection matrices in the phase-integral method

B. Lundborg, N. Fröman, P. O. Fröman, 1988, Mathematical Proceedings of the Cambridge Philosophical Society.

Generalization of the Fermi-Segrè formula

N. Fröman, P. O. Fröman, P. O. Fröman, 1981 .