I retired in 2002.
Please do not send mail to the University, as it may be considerably
Email sent to my university account will probably be deleted
unread; there is too much spam to delete by hand, so I delete everything
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For contact information, click here.
Click on the next link for my bibliography.
Here for pages of reviews of books and papers. (The "papers" page has become a sort of blog.)
Following is a link to my personal website .
Recent revisions of the papers page:
October 27, 2013.
An essay entitled "Restoring the quantum state after a measurement"
was added to the
October 23 entry on the "papers" page. The October 27 entry reports on the nearly final results of
two years of effort to obtain correction
in the literature of erroneous papers of Dressel and Jordan.
December 6: 2013. A recent paper of Emerson, Serbin, Sutherland, and Veitch is recommended for
its transparent presentation of the Pusey/Barrett/Rudolph
February 9, 2014. (1)
Reservations are expressed about a much-discussed paper "Direct
measurement of the
quantum wavefunction" by Lundeen, Patel, Stewart,
(2) It looks as if the Dressel/Jordan affair may
finally be at an end. The final results and how they reflect on
the standards of three mainstream journals
(Physical Review Letters, Journal of Physics A, and Physical
Review A) are described.
July 25, 2014.
A statistical analysis is discussed of a famous paper of Grangier, Roger,
and Aspect. This paper
is widely taken as establishing the existence of the photon.
It turns out that the data presented in the
paper actually reject the hypothesis of the existence of the photon at nearly the 100% signficance
level. (Presumably, the problem lies
with the data rather than the hypothesis.)
August 2, 2014.
A preliminary critical analysis of a paper in Space Weather, "On the probability of occurrence of extreme
space weather events" by P. Riley,
is posted on the papers page in order to solicit comments. This paper estimates the probability
of occurrence in the next decade of a solar storm
which potentially could knock out power grids for months at
a surprisingly high 12%, an estimate
which has been widely disseminated in the popular press.
August 4, 2014.
A recent paper of Aharonov, et al., is entitled "The quantum pigeonnole
principle and the nature of
quantum correlations". The classical
pigeonhole principle states that if you try to put three pigeons in two
pigeonholes, at least two of the pigeons
have to go in the same hole. The paper claims : "...we show that
in quantum mechanics, this is not true!".
An article commenting on this paper is posted on the papers page.
August 25, 2014.
The preliminary analysis of the Riley paper mentioned in the August
2 entry above has been
replaced by a 3-page "Comment" paper,
which is a summary of a 15-page analysis. On the papers page, of course.
August 30, 2014
. Replaced on the August 4, 2014 entry of the papers page the original Comment on the Aharonov, et al.,
article on the pigeonhole principle
with a new Version 2. The exposition is expanded and a bad repeated
typo is corrected.
January 14, 2015
Posted on the papers page a 30-page reanalysis of Riley's paper "On the probability
of occurrence of
weather events" (see Aug. 2 and 25, 2014 entries above). Included
is the fate of my "Comment" paper
submitted to the journal Space Weather .
September 22, 2015:
Posted on the papers page a letter disagreeing with the interpretation of an experiment reported in:
"NMR simulation of Quantum Pigeonhole Effect" by Anjusha V.S., Swathi S.
Hegde, and T.S. Mahesh,
This paper claims to experimentally
verify a quantum violation of the classical "pigeonhole principle" (see Aug.
4, 2014 entry).
I have no reason to doubt the experimental
results, but disagree with the authors' interpretation of them.