Writings
People
ABDUS SALAM: BEACON OF SCIENCE
H. R. Haq, Bangladesh Observer, Dec 6, 1996
Obituary of Nobel Laureate (1979) physicist Abdus Salam
SUBRAMANYAN CHANDRASEKHAR
H. R. Haq, Bangladesh Observer, Aug 21, 1995
Obituary of Nobel Laureate (1983) physicist Subramanyan Chandrasekhar
Physics
DRESSED-FIELD PULSES IN AN ABSORBING MEDIUM
J. H. Eberly, M. L. Pons, and H. R. Haq, Physical Review Letters 72, 56–59 (1994)
Abstract: We have carried out a series of numerical experiments on the propagation of optical pulse pairs in absorbing media under one-photon and two-photon resonant lambda-system conditions. We report the first observation of the spatial evolution of ‘‘dressed-field’’ pulses, the exact analog of the temporal evolution of dressed-atom states.
THEORETICAL STUDY OF THE SPECTROSCOPIC PROPERTIES OF H2+
H.R. Haq, J.R. Krumrine, Los Alamos National Lab Report (unpublished, 1994)
Abstract: We compute the visible absorption spectrum of the vibrational and rotational excited states of H2+ with adiabatic corrections incorporated into the Born-Oppenheimer approximation. We utilize the distributed Gaussian bases algorithm for solving Schrodinger’s equation to validate Sorokin’s proposed explanation that the diffuse interstellar absorption bands result from resonantly enhanced two-photon absorption of H2+ molecules located near the surface of the Stromgren sphere that surrounds an O or B type star.
CASIMIR FORCE
H.R. Haq, Institute of Theoretical Science Report (Science Network of the Royal Society, 1995)
Abstract: We study the Casimir force and how it can be used to give a quantitative explanation of spontaneous emission, which turns out to be the sum of a radiation reaction effect and a vacuum fluctuation effect. For an atom in the excited state the two contributions add up to give exactly the spontaneous emission rate, the Einstein A coefficient.
GENERALIZED LAMB-DIP SPECTROSCOPY
H.R. Haq, Institute of Theoretical Science Report (unpublished, 1996)
Abstract: We formulate the equations of motion for a three level dressed atom with dichromatic excitation using the master equation for quantum trajectories. We formally solve the equations of motion as a vector continued fraction.
THE SALAM-WEINBERG ELECTROWEAK THEORY
H.R. Haq, Institute of Theoretical Science Report (unpublished, 1996)
Abstract: The 1979 Nobel Prize in Physics was awarded to Sheldon Glashow, Abdus Salam and Steven Weinberg for their “contributions to the theory of the unified weak interaction between elementary particles.” This is a short review of their work, describing unification of the weak and electromagnetic interactions, which is a consequence of the gauge principle. I start with a discussion of the gauge invariance and the formulation of quantum electrodynamics (QED), followed by a description of spontaneous symmetry breaking, leading to a description of the electroweak theory.
GEOMETRY OF AN ACCELERATING BLACK HOLE
R.L. Zimmerman and H.R. Haq, submitted to General Relativity and Gravitation (1997)
Abstract: We investigate circular orbits of both particles and photons around an accelerating Schwarzschild-like black hole, using the Levi-Civita C-metric. These necessarily do not lie in a place. We show the behavior of a spherical shell of dust or photons as it falls freely from some fixed radius outside the black hole. The results are expressed in a coordinate system rigidly attached to the black hole.
Energy
ETRM IMPLEMENTATIONS: A NEW APPROACH FOR BETTER RESULTS
H. R. Haq and M. Alger, CROSSINGS – The Journal of Trading and Risk Management, p20, Spring 2011
Abstract: Many energy trading and risk management (ETRM) system implementations look like successes when implemented, but may not leave business users in a significantly better place over time. The authors discuss some of the challenges firms face with new ETRM systems and the unique steps firms can take during the implementation process to overcome them.
EXPLAINING THE ENERGY TRADING INCOME STATEMENT
H. R. Haq and M. Alger, CROSSINGS – The Journal of Trading and Risk Management, p41, Fall 2011
Abstract: Many physical energy trading organizations, especially those that trade as part of a larger organization, often struggle with quickly getting a clear picture of the monthly income statement. Beyond the challenges of integrated systems, there are often standing differences between how a trading group will view profit and loss versus the organization’s treasury group. In this article, the authors discuss what causes these differences and the steps trading groups can take to consistently and quickly explain them.
