Harry Lee Morrison birth: October 7, 1932 place: Arlington
County, Virginia B.A. Physics (1955)
Catholic University Professor Emeritus
University of California at Berkeley 
Career: Research chemist at the National Institutes of Health, 19551956; Post doctoral fellow at the National Bureau of Standards, 19601961. He was called to active military service at the U.S. Air Force Academy in 1961 as an Assistant Professor of Physics at The U.S. Air Force Academy, 19611964; Concurrent post as theoretical physicist at the Denver Research Institute, 19621964; Research Physicist at the Lawrence Radiation Laboratory, 19641972; Associate Director of the Lawrence Hall of Science, 19721975; Assistant Dean of the College of Letters & Science at UCBerkeley; Associate Professor of Physics at UCBerkeley, 19721975, and Professor of Physics, 1975 until retirement. Was visiting professor at the University of Colorado, MIT, and Howard University. He is a Fellow of the American Physical Society.
Research Interests
My research interests are in quantum liquid theory and in the foundations of quantum statistical physics. I have studied the phenomenon of superfluidity in interacting Bose systems. This work has been concerned with the spectrum of elementary excitations which provide the basis for the thermodynamic properties of quantum liquids.
We have found theorems which govern the macroscopic quantization of superfluid flow. Currently, I have been investigating the topological structure of two dimensional quantum liquids and the question of symmetries and broken symmetries.
We have developed a microscopic theory of the genesis of the vortex component of the excitation spectrum of two dimensional Bose systems.
Projects
I have been interested in the occurrence of macroscopic quantization
in many body systems. Byers and Yang have shown that the quantization
of magneticflux in amultiply connected superconductor can be understood
as a consequence of the Meissner effect together with the singledvalued
character of the manybody wave functions, and general principles
of statistical mechanics. With John Garrison and Jack Wong, I
have found that the quantization of circulation in superfluid
helium can be understood in an analogous manner. We have shown
that the free energy of a vortex system has the Byers Yang property
of being periodic and even in the circulation with period h/m.
This leads to the prediction of a helium analog of the ac Josephson
effect.
I have explored the issue of long range order in thin films with
Garrison and Wong. For many body systems with smooth potentials
we have found generalizations of the Hohenberg Mermin Wagner theorem.
We have shown that an equilibrium state for a homogeneous thin
film is necessarily invariant under any continuous internal symmetry
group generated by a conserved density. The absence of long range
order follows from its relation to broken symmetry. This work
has taken us into the area of algebraic methods of quantum field
theory and the KuboMartinSchwinger boundary condition.
I have had a continuing interest in the elementary excitation
spectrum of interacting Bose systems. I have studied the algebra
of currents and densities toward this end. These are natural collective
coordinates. At lowest order one recovers the BogoliubovZubarev
theory of collective excitations. However, one can easily go further.
With Uwe Albertin (a former graduate student), I have found that
the elementary excitation spectrum for a Bose liquid decomposes
into an algebraic part and a topological part. These correspond
to quasiparticles and pseudoparticles (vortices). Within the formalism
of current algebra the fundamental tool is the Helmholtz decomposition
of the current operator. One obtains the Bogoliubov spectrum associated
to the density and the longitudinal part of the current density.
The contribution of the transversepart of the current density
yields the Hamitonian for vortexvortex interactions.The current
algebra provides a microscopic basis for the methods of Rasetti
and Regge in their theory of quantum vorticity.
With Achilles D. Speliotopoulos (a former graduate student), I
have studied the dynamics of the vortex system that one obtains
for two dimensional Bose systems. A Lagrangian is derived from
the current algebra representation of the microscopic theory.
In the constant density approximation, one obtains Kirchoff 's
equations for the motion of the vortices in the plane. The energy
of the vortex system is the KosterlitzThoulesscoulombic interaction.
We have studied the symmetries of the vortex Lagrangian to identify
those constants of the motion which determine the appropriate
ensemble for the statistical mechanics of the vortex gas. This
leads to the underlying principles for the partition function
of Kosterlitz and makes contact with the KosterlitzThouless phase
transition mechanism.
Selected Publications
Dr. Morrison specialized in an area of theoretical physics called statistical mechanics. For many years the only UC Berkeley faculty member in that field, he attempted to understand the behavior of fluids when the temperature drops low enough for them to become socalled superfluids. In this state they exhibit peculiar quantum properties, ranging from flow without resistance to the generation of quantized vortices by spinning the container.
12. Speliotopoulos, Achilles D.; Morrison, Harry L. Observations on the dynamics of the twodimensional vortex gas on compact Riemann surfaces. J. Phys. A 26 (1993), no. 14, 35273543.
11. Speliotopoulos, Achilles D.; Morrison, Harry L. The nature of symmetry breaking in the superfluid phase transition in two dimensions. Modern Phys. Lett. B 8 (1994), no. 6, 381392.
10. Speliotopoulos, Achilles D.; Morrison, Harry L. On the KosterlitzThouless transition on compact Riemann surfaces. Modern Phys. Lett. B 7 (1993), no. 3, 171182.
9. Albertin, Uwe K.; Morrison, Harry L. Representations of the diffeomorphism group describing an infinite Bose gas in the presence of ideal vortex filaments. J. Math. Phys. 31 (1990), no. 6, 15351543.
8. Welsh, A. H.; Morrison, H. L. Robust $L$ estimation of scale with an application in astronomy. J. Amer. Statist. Assoc. 85 (1990), no. 411, 729743. 62F35
7. Speliotopoulos, Achilles D.; Morrison, Harry L. The Hodge decomposition and the vortex Hamiltonian. Phys. Lett. A 141 (1989), no. 56, 278284.
6. Albertin, Uwe K.; Morrison, Harry L. Current algebras and liquid helium. Phys. A 159 (1989), no. 2, 188220.
5. Lindesay, James V.; Morrison, Harry L. The geometry of quantum flow. Mathematical analysis of physical systems, 135167, Van Nostrand Reinhold, New YorkLondon, 1985.
4. Creswick, Richard J.; Morrison, Harry L. On the dynamics of quantum vortices. Phys. Lett. A 76 (1980), no. 34, 267268.
3. Garrison, John C.; Wong, Jack; Morrison, Harry L. Absence of longrange order in thin films. J. Mathematical Phys. 13 (1972), 17351742.
2. Garrison, John C.; Morrison, Harry L.; Wong, Jack Galilean relativity, locality, and quantum hydrodynamics. J. Mathematical Phys. 11 1970 630634.
1. Morrison, H. L. The quantum theory of manyparticle systems. International Science Review Series, Vol. II Gordon and Breach Science Publishers, New YorkLondon 1962 xiv+345 pp. ???
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