Copenhagen interpretation of quantum mechanics deals with these problems is reviewed. A new interpretation of the formalism of quantum mechanics, the transactional interpretation, is presented. The basic element of this interpretation is the transaction describing a quantum event as an exchange of advanced and retarded waves, as implied by the work of Wheeler and Feynman, Dirac, and others. The transactional interpretation is explicitly nonlocal and thereby consistent with recent tests of the Bell inequality, yet is relativistically invariant and fully causal. (...) A detailed comparison of the transactional and Copenhagen interpretations is made in the context of well-known quantum-mechanical Gedankenexperimenre and "paradoxes." The transactional interpretation permits quantum-mechanical wave functions to be interpreted as real waves physically present in space rather than as "mathematical representations of knowledge" as in the Copenhagen interpretation. The transactional interpretation is shown to provide insight into the complex character of the quantum-mechanical state vector and the mechanism associated with its "collapse." It also leads in a natural way to justification of the Heisenberg uncertainty principle and the Born probability law (P = ii iij*), basic elements of the Copenhagen interpretation. (shrink)

This book shines bright light into the dim recesses of quantum theory, where the mysteries of entanglement, nonlocality, and wave collapse have motivated some to conjure up multiple universes, and others to adopt a "shut up and calculate" mentality. After an extensive and accessible introduction to quantum mechanics and its history, the author turns attention to his transactional model. Using a quantum handshake between normal and time-reversed waves, this model provides a clear visual picture explaining the baffling experimental results that (...) flow daily from the quantum physics laboratories of the world. To demonstrate its powerful simplicity, the transactional model is applied to a collection of counter-intuitive experiments and conceptual problems. (shrink)

The problem of the direction of electromagnetic time, i.e., the complete dominance of retarded electromagnetic radiation over advanced radiation in the universe, is considered in the context of a generalized form of the Wheeler-Feynman absorber theory in an open expanding universe with a singularity atT=0. It is shown that the application of a four-vector reflection boundary condition at the singularity leads to the observed dominance of retarded radiation; it also clarifies the role of advanced and retarded waves in the emission (...) of very weakly absorbed radiation such as neutrinos. (shrink)

The plane of the present is a concept that is useful for discussing the various paradigms of time. Here by ‘plane of the present’ we mean the temporal interface that represents the present instant and that forms the boundary between the past and the future. We use the geometrical term ‘plane’ to indicate an extended surface in the space-time continuum, as opposed to a ‘point’ on some time axis. This point/plane dichotomy is intended to raise issues of extension and simultaneity (...) and to examine the degree to which these are meaningful concepts from various physical viewpoints. We will show by example in the present work that the plane of the present is a pivotal concept that offers considerable power in differentiating between various views of the nature of time. The concept of time within the main stream of physics thinking has followed a rather convoluted path over the past three millennia. Anticipating the modern motion picture, Zeno of Elea (c.490-c.430 B.C) questioned whether time should appropriately be viewed as a continuously flowing river, or should more properly be considered as a rapid sequence of stop-motion ‘freeze-frames’, in effect rendering geometrical each instant as a separate infinitesimal point on the line of time. Adopting this view, he asked how physical motion could occur. He argued paradoxically that motion is not possible, since it appears to happen only between the frozen frames of time instants.1 From the viewpoint of Zeno, the plane of the present would be simply the last and most recent in this sequence of freeze-frames. It would be that frozen instant, spanning the universe, which changes progressively as the instant we call ‘now’ becomes the frozen past and future possibility freezes into the ‘now’ of present reality. We note that the plane of the present as a concept does not resolve the arrow paradox that Zeno raised. It only provides a way of thinking about it. (shrink)

EPR experiments demonstrate that standard quantum mechanics exhibits the property of nonlocality , the enforcement of correlations between separated parts of an entangled quantum systems across spacelike separations. Nonlocality will be clarified using the transactional interpretation of quantum mechanics, and the possibility of superluminal effects (e.g., faster-than-light communication) from nonlocality and non-linear quantum mechanics will be examined.

The transactional interpretation of quantum mechanics is summarized and various points concerning the transactional interpretation and its relation to the Copenhagen interpretation are considered. Questions concerning mapping the transactional interpretation onto the Copenhagen interpretation, of advanced waves as solutions to proper wave equations, of collapse and the quantum formalism, and of the relation of quantum mechanical interpretations to experimental tests and results are discussed.

Agendanken experiment is proposed for distinguishing between two models accounting for the macroscopic arrow of time. The experiment involves the veloeity revesal of components of an isolated system, and the two models give contrasting predictions as to its behavior.

I live in Seattle, the city which last Fall was host to two major international conferences of interest to science fiction readers: The Annual International IEEE Symposium on Virtual Reality (VRAIS- 93) and The 5th ACM Conference on Hypertext (Hypertext-93). I was able to attend both conferences, and I'll use this column to provide an overview of what I learned there.

This panel considered the uses of and prospects for the stakeholder theory/approach. After 20 years of popularity, the stakeholder concept has still notemerged as a true theory. However, it offers some unique perspectives on business organizations and there is plenty of room to develop stakeholder theory and research. These session notes are offered to further the scholarly discussion.

Alternate View Column AV-97 Keywords: super-lasers space molecules atom lasers 4-wave mixers direct CP violation matter-antimatter asymmetry K0 mesons Published in the October-1999 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 03/28/99 and is copyrighted ©1999 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Keywords: geology instrument probe Earth interior crust magma core crack underground nuclear explosion molten iron China Syndrome melting rock Published in the December-2003 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 06/22/2003 and is copyrighted ©2003 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-36 Keywords: cold fusion, deuterium, electrolysis, heavy water, Pons and Fleischmann Published in the December-1989 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 5/5/89 and is copyrighted © 1989, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-112 Keywords: quantum mechanics entangled states computer computing 7 qubits prime number factoring Schor algorithm NMR nuclear magnetic resonance fast parallel decryption coherence wave-function collapse many-worlds transactional interpretation Published in the June-2002 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 12/19/2001 and is copyrighted ©2001 by John G. Cramer.

Keywords: extrasolar planets Hubble telescope occulter apodization life oxygen Published in the March-2007 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 10/17/2006 and is copyrighted ©2006 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-105 Keywords: superluminal faster-than-light laser pulses phase front velocity negative group velocity reshaping Published in the March-2001 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 08/19/2000 and is copyrighted ©2000 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-101 Keywords: quantum mechanics paradox Mach-Zender interferometer interaction free measurement test Published in the June-2000 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 12/19/99 and is copyrighted ©1999 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-70 Keywords: Casimir effect negative energy quantum nonlocality tachyons extra dimensions Published in the February-1995 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 7/13/94 and is copyrighted ©1994 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-02 Keywords: cosmology, bubble, universe, inflation Published in the September-1984 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 2/10/84 and is copyrighted ©1984, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-48 Keywords: nonlinear quantum mechanics FTL communication other universes Everett Wheeler Published in the October-1991 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 3/10/91 and is copyrighted ©1991 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-58 Keywords: Japan science fiction HamaCon physics Tscuba KEK TRISTAN Published in the April-1993 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 9/17/92 and is copyrighted ©1992 by John G. Cramer. All rights reserved. No part may be reproduced in any form without prior explicit permission of the author.

Alternate View Column AV-19 Keywords: cosmic strings, gravitational lensing, angle deficit, superconductor, space drive Published in the April-1987 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 9/19/86 and is copyrighted © 1986, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-24 Keywords: cosmic string, oscillation, gravity wave, spiral galaxy Published in the January-1988 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 6/26/87 and is copyrighted © 1987, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-108 Keywords:Bose Einstein condensate force reversal collapse bounce supernova neutron star remnant Published in the October-2001 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 4/6/2001 and is copyrighted ©2001 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-107 Keywords:Kubric motion picture movie year 2001 space station artificial intelligence moonbase space exploration Published in the July-2001 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 2/4/2001 and is copyrighted ©2001 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-81 Keywords: Alcubierre Warp Drive FTL spacewarp solution Einstein's equations general relativity Published in the November-1996 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 4/15/96 and is copyrighted ©1996 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-109 Keywords:carbon nanotube space orbital elevator high tensile strength conductor semiconductor hydrogen energy storage Published in the December-2001 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 6/19/2001 and is copyrighted ©2001 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-74 Keywords: gamma ray bursts NASA BATSE fireball neutron star merger galactic cosmological cosmology Published in the October-1995 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 3/1/95 and is copyrighted (©1995 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-110 Keywords: linear electron positron collider e+e- high energy particle physics accelerator tunnel USA Japan Germany Published in the February-2002 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 8/4/2001 and is copyrighted ©2001 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-06 Keywords: dimensions, Kaluza-Klein, compactified, string theory Published in the April-1985 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 10/1/84 and is copyrighted © 1984, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-90 Keywords: quantum mechanics nonlocality Wheeler delayed choice eraser interferometer retroactive action Published in the June-1998 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 12/17/97 and is copyrighted ©1997 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-62 Keywords: quantum nonlocality entangled states recreation communication Published in the December-1993 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 5/17/93 and is copyrighted ©1993 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-38 Keywords: special relativity, twin paradox, time dilation, starship, Einstein, Lorentz factor Published in the March-1990 issue of Analog Science Fiction & Fact Magazine; This column was written and submitted 8/20/89 and is copyrighted © 1989, John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

Alternate View Column AV-91 Keywords: dark matter WIMPs weakly interacting massive particles detection DNA eV energy deposition Published in the September-1998 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 02/20/98 and is copyrighted ©1998 by John G. Cramer. All rights reserved. No part may be reproduced in any form without the explicit permission of the author.

This column is about a new alternative to standard Big Bang cosmology that reaches back in time to the era before the Big Bang in an effort to remove some of the arbitrary assumptions from the model. It's in part the work of Gabriele Veneziano, a theorist at CERN, and it is called pre-Big-Bang cosmology. We'll begin by reviewing the standard scenario of the origin of the universe.

Keywords: Planck, length, holographic, space, time, quantization, quantum, noise, gravity, wave, detector, GEO600 Published in the December-2008 issue of Analog Science Fiction & Fact Magazine ; This column was written and submitted 7/28/2008 and is copyrighted ©2008 by John G.

I'm an experimental physicist. The basic physics research I do is funded primarily by the U. S. Government. As I write this, it is less than two weeks before the 1993 Presidential Inauguration. The new Clinton Administration is still of an unknown quantity. A new Presidential Science Advisor with excellent qualifications, Dr. John H. Gibbons, has just been appointed, but little is know about the science policies of the new administration.

This column is about experimental tests of the various interpretations of quantum mechanics. The question at issue is whether we can perform experiments that can show whether there is an "observer-created reality" as suggested by the Copenhagen Interpretation, or a peacock’s tail of rapidly branching alternate universes, as suggested by the Many-Worlds Interpretation, or forward-backward in time handshakes, as suggested by the Transactional Interpretation? Until recently, I would have said that this was an impossible task, but a new experiment has (...) changed my view, and I now believe that the Copenhagen and Many-Worlds Interpretations (at least as they are usually presented) have been falsified by experiment. (shrink)

The transactional interpretation of quantum mechanics is applied to the “interaction-free” measurement scenario of Elitzur and Vaidman and to the Quantum Zeno Effect version of the measurement scenario by Kwiat, et al. It is shown that the non-classical information provided by the measurement scheme is supplied by the probing of the intervening object by incomplete offer and confirmation waves that do not form complete transactions or lead to real interactions.

One of the great and persistent technological dreams of science fiction has been the invention which would nullify or reverse the force of gravity. H. G. Wells in The First Men in the Moon did it in 1901 with Cavorite, a substance which shields objects behind it from gravitational lines of force. James Blish in the Cities in Flight series used the Spindizzy, a device which converts rotation and magnetism into gravity fields and forces. And, of course, "floaters", "null-g speeders" (...) and "grav sleds" have abounded as techno-props in science fiction stories for many years. (shrink)

My interest in the physics of space station gravity developed because last year Vonda McIntyre was writing a book with a space station setting, and she asked my advice. The book, Barbary, is about a teenager who leaves Earth to live in a space station with spin-generated gravity. I helped Vonda in a very minor way by identifying the physical effects that the heroine would experience in that environment. What's it like to ride an elevator in a space station? How (...) would a ball game look if it were played there? If you woke up in a strange location, what simple tests would tell if you were in a rotating space station rather than at rest on the ground? And so on ... I found that there are some interesting side-effects of artificial gravity, perhaps well known to NASA experts but obscure to the rest of us. And I was surprised to find that some recent SF hasn't been too accurate in describing the space habitat environment. (shrink)

This AV Column is about the Universal Solvent of modern physics which we call antimatter, and about a bottle in which it can be and has been kept. However, before getting to the hardware I want to talk about antimatter as it relates to the fundamental symmetries of the universe.

Then, as soon as my column was safely submitted, hot new results on antigravity appeared. The lead article in the January 6, 1986 issue of Physical Review Letters had the unassuming title: "A Reanalysis of the Eötvös Experiment" by E. Fischbach, et al. Two days later the New York Times ran an article with the headline: "Hints of Fifth Force in Universe Challenge Galileo's Findings" describing the importance of Fischbach's work. Peculiar experimental results from terrestrial gravity measurements and from the (...) behavior of "strange" K-mesons (kaons) had been explained by a new theory proposing a "hypercharge" force, a new fifth force of nature which is gravity-like but which repels rather than attracting nearby masses. This new antigravity force is the subject of this AV column. (shrink)

This Alternate View column is about two new reports of possible antigravity breakthroughs. Perhaps, like the Dean Drive, they will prove to be bogus. But the subject continues to have interesting SF implications, and the payoff, if an antigravity route out of Earth's gravity well could be found, would be enormous.

As the author of these columns describing cutting edge physics and astronomy, I get quite a few letters and E-mail from readers who are more interested in “over-the-edge physics and astronomy”. One recurring theme is various alternatives to the standard model of Big Bang cosmology. Perhaps the universe is not expanding; it’s just that light “gets tired” on its path from far away and loses some of its energy. Perhaps quasars are closer than we think, particularly since some of them (...) appear to be linked to closer galaxies. Perhaps relativity is wrong, and it’s the speed of light that is different in different parts of the universe or changing with time. Perhaps quasars are the tailpipes of nearby alien spaceships, and they have such large red shifts because we only see them when they are moving away from us. And so on…. (shrink)

Last Saturday I made my first journey into virtual reality . I walked with giant strides around a city called Seattle. I leaped the Columbia Center, the tallest building in the city, with a single bound. I dove beneath the surface of Puget Sound and watched a pod of whales heading north toward Canada. I hovered above the Space Needle, then dropped inside to enjoy its panoramic view and to examine its structural details. I raced a Washington State ferry across (...) the Sound from Seattle to Bremerton. I caught up with it just as it approached the Bremerton dock and was able to watch the docking operation from a perch on the roof of the bridge. Then I flew back across the Sound and peered down into the Kingdome, looking in vain for a winning team. Finally, I pointed my magic glove across the Sound to the Olympic Peninsula, flew there, and examined a group of towering snow-capped peaks from all angles. I did all of this without leaving a small building on the campus of the University of Washington. (shrink)

Yet normal particle interactions produce matter and antimatter in equal amounts. If matter and antimatter in the early universe had been in perfect balance, they would long since have been annihilated out of existence, leaving behind a universe of photons and a few electrons. We would not be here to study such a universe, since our very existence depends on the gross excess of matter over antimatter now present. Where did the matter come from? What happened in the early stages (...) of the Big Bang that produced the contemporary dominance of matter? (shrink)

Two years ago, astrophysicists studying Type Ia supernovas discovered that our universe is a much stranger place than we had imagined, with invisible vacuum energy accelerating its expansion. (See my column about this in the May-1999 Analog.) However, new astrophysical observations from the BOOMERanG experiment (Balloon Observations Of Millimetric Extragalactic Radiation and Geomagnetics), a balloon-borne cryogenic microwave telescope measurement that flew at an altitude of about 24 miles over the Antarctic, indicate that our universe is also rather ordinary, in that (...) its space is maximally flat. The term “flat” as used here means that the space of our universe is neither positively curved like a ball or negatively curved like a potato chip. It appears that in our universe, the tendencies of space toward positive curvature from gravitational attraction and towards negative curvature from expansion kinetic energy are precisely in balance, leaving space on the average completely free of curvature. (shrink)

The "groupie" tendency of bosons has recently been demonstrated in a breakthrough experiment by Carl Wieman of the University of Colorado and Eric Cornell of the National Institute for Standards and Technology and their group. They were able to cool a gas of rubidium-87 atoms to a temperature so low that thousands of atoms coalesced into the same quantum state, forming a new state of matter called a Bose-Einstein condensate (BEC). This column is about that work.