sci.physics.research

a student wrote:
> On May 28, 10:20 am, Benjamin wrote:
>
>>a student wrote:
>>
>>>A very quick readthrough appears to give a contradiction in their
>>>model. Look at Eq. (13), defining a set of joint probabilities P'.
>>>The righthand side of this equation, summed over the + and - symbols
>>>clearly sums to 1
>>
>>Sorry, but I do not get 1!
>>At least when I put this in mathematica....
>
>
> Why use mathematica?....

Dear a student,
after I saw the problems you have had with these equations (which I did
not have, of course since I thought it was clear what they do there), I
asked the authors to clarify this in their eprint and they seem to have
done this.

There was simply a typo and too much "shortening". The misconception you
seemed to have might have been arousen because they omitted a quick
manipulation one can do in a single line (or in ones head) due to keep
tha paper short.

The senior author was a professor emeritus who seemed to like feedback
about the preprint which is (as he wrote in his answer to me) a draft
for a paper to be sent to phys. rev. A.

But he wrote, that he wants more reports before he will send it to the
journal in the next months. Because of sending it to phys rev he wanted
to keep it as short as pssible and that was the reason for this
forgotten line).

Well, they have updated it and still, I cannot find any error.
It has now a version 2:

/abs/