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April 1998 Physics Today Contents


Articles:

Shadows and Mirrors: Reconstructing Quantum States of Atom Motion

Quantum mechanics allows us only one incomplete glimpse of a wavefunction, but if systems can be identically prepared over and over, quantum equivalents of shadows and mirrors can provide the full picture -- Dietrich Leibfried, Tilman Pfau and Christopher Monroe

Cosmic Rays, Nuclear Gamma Rays and the Origin of the Light Elements

Recent observations of Li, Be and B abundances in halo stars formed in the early Galaxy shed new light on the source of cosmic rays, suggesting acceleration from the ejecta of supernovae -- Reuven Ramaty, Benzion Kozlovsky and Richard Lingenfelter
       ** X-ray imaging of supernova remnant SN1006

Quantum Theory without Observers---Part Two

The paradoxes of quantum theory can be resolved in a surprisingly simple way: by insisting that particles always have positions and that they move in a manner naturally suggested by Schrödinger's equation -- Sheldon Goldstein


Departments:

Reference Frame

Back to basics at ultrahigh temperatures -- Frank Wilczek

Search and Discovery

Scanning microscopes probe local details of the quantum Hall state. Researchers are finding ways to peer tens of nanometers below the surface of an insulator to image some properties of two-dimensional electron gases.

Energy budget of deep-focus earthquakes suggests they may be slip-sliding away. The mystery of what initiates earthquakes in Earth's mantle is as deep as ever, but the energetics of these events may help provide answers.

Terrestrial tomography

Deep earthquakes: Old faults or new?

Meeting Preview

San Francisco meeting will showcase electro-optics

Washington Reports

Clinton changes his science policy team, replacing Gibbons with Lane as science adviser

With the first balanced budget in three decades, Clinton's R&D spending plan looks great, but...

Physics Community

Canada's physicists hope to reverse recent losses through funding reshuffle. For the second time in four years, part of the Canadian academic community's research funding has been turned into a lottery.

History of physics catalog is now on-line

McNutt will be next AGU president-elect

New York exhibition marries art and science

Brief:
       ** TV series on commercial applications of Russian scientific research

Web Watch: National Nuclear Data Center; Astronautics and spacecraft design; American Vacuum Society's Buyers Guide

Books

Behind the Nuclear Curtain: Radioactive Waste Management in the Former Soviet Union, D. J. Bradley (reviewed by T. B. Cochran)

The Sun as a Star, R. J. Tayler (reviewed by S. Baliunas)

Crystal Fire: The Birth of the Information Age, M. Riordan and L. Hoddeson (reviewed by V. Narayanamurti)

The Truth of Science: Physical Theories and Reality, R. G. Newton (reviewed by J. T. Cushing)

Flash of the Cathode Rays: A History of J. J. Thomson's Electron, P. F. Dahl (reviewed by S. Hong)

Planet Quest: The Epic Discovery of Alien Solar Systems, K. Croswell;
Worlds Unnumbered: The Search for Extrasolar Planets, D. Goldsmith;
and The Quest for Alien Planets: Exploring Worlds Outside the Solar System, P. Halpern (reviewed by S. J. Dick)

Gravity Currents in the Environment and the Laboratory, J. E. Simpson (reviewed by M. Manga)

Signals, Sound, and Sensation, W. M. Hartmann (reviewed by S. T. Neely)

The Dancing Universe: From Creation Myths to the Big Bang, M. Gleiser (reviewed by D. L. Anderson)

Lecture Notes on Atomic and Molecular Physics, S. Erkoç and T. Uzer (reviewed by J. D. Garcia)

Plus...

Our regular sections: Physics Update, Letters, New Products, We Hear That, and Information Exchange.

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