Investigate Paradox that Puzzled Einstein with New Quantum Mechanics
Software

Physics Academic Software Releases BELLBOX

November 24, 1993--BELLBOX simulates N. David Mermin's famous demonstration
of the Einstein-Podolsky-Rosen paradox, which encapsulates Einstein's
basic objection to the foundations of quantum mechanics. Developed by
Darrel Conway of Grinnell College, the program is designed to accurately
simulate experiments that show the predictions made by quantum mechanics
for correlations between spatially separated particles in a spin zero
state accurately reflect the measurements made in the laboratory.

By manipulating the apparatus in BELLBOX, students can investigate the
nature of the predicament that confronted Einstein as he began to study
the field of quantum mechanics. They can also explore the statistics of
data collection in the quantum regime and the independence of the
resulting data from the physical arrangement OF the particle detectors.

"In quantum mechanical systems, we often encounter simple systems that can
easily be modeled mathematically, but which violate our expectations for
such systems," says Conway. "BELLBOX is a simulation of a quantum
mechanical system that clearly violates our expectations."

BELLBOX frees students from much of the drudgery associated with
experiments in quantum mechanics. The detectors are "perfect"; that is,
unlike the real detectors used in actual experiments, they always
accurately record the characteristics of detected particles. The data can
be written to a file as they are obtained, and a tabular summary of
collected data in raw and processed forms is always available. A help text
system assists with data interpretation.

Reviewers attest to BELLBOX's educational utility. Eugen Merzbacher,
University of North Carolina - Chapel Hill, says the program is valuable
as an "instructive adjunct to the study of the strange statistical
properties of 'entangled' quantum states." Similarly, Ronald Stoner,
Bowling Green State University, states that it "will be most useful as a
lecture demonstration."

BELLBOX is published and distributed by Physics Academic Software, which is
a project of the American Institute of Physics in cooperation with the
American Physical Society and the American Association of Physics
Teachers, as part of a continuing series of educational software from
PAS.

BELLBoX operates on IBM PC, XT, AT, or PS/2 personal computers with at
least 512K of RAM memory, DOS 3.0 or higher, and Hercules, CGA, MCGA, EGA,
or VGA color graphics.

BELLBOX may be purchased from Physics Academic Software for $39.95 plus
$3.50 shipping and handling for the first package ($12.50 foreign air
mail) and $.75 ($4.00 foreign) for each additional package. Lab Packs,
which include ten copies of the software and one User's Manual, are
available for $119.95.

For a limited time, you can purchase the entire PAS collection, with or
without Lab Packs, and save up to 20% off the regular price. Physics
Academic Software offers a no-risk guarantee by providing a full refund
for packages returned within 30 days.

PAS also offers a Standing Order Plan, which brings the latest in
innovative physics courseware to your door, along with exceptional
savings. When you join the Standing Order Plan, you will automatically
receive each new PAS program, with or without Lab Packs, and save up to
20% off the list price.

Orders and requests for the Physics Academic Software 1993-1994 Catalog of
Programs should be directed to The Academic Software Library, Campus Box
8202, North Carolina State University, Raleigh, NC 27695-8202. By
telephone, call (800) 955-TASL or (919) 515-7447; FAX (919) 515-2682.

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