Re: laser experiment

On 7/22/05 8:06 AM, in article
1122044786.571017.133990@xxxxxxxxxxxxxxxxxxxxxxxxxxxx, "ML"
<Michiel.Lambrechts@xxxxxxxxx> wrote:

> Hi,
>
> I'm an 18 year old student and I made an end work about Quantum
> Physics. Now, I want to do some of the experiments I described
> theoretically.
> One consists of a laser beam with 45° polarisation to be divided in
> two beams of 0° and 90° by a polarising beam splitter cube (Glan
> thompson). Those two beams are supposed to be reunited (with an
> inverted beam splitter cube) to one beam with the original 45°
> polarisation.
> Theoretically, this is possible, but can it be done practically? This
> is my question for you.
> If you do not know the answer, or don't feel like answering, could you
> please help me find someone who can/ will answer.
>
> Thank you very much
>
> Best regards
>
> Michiel Lambrechts
>
Please explain what is meant by "an end work about Quantum" Physics is.

There is nothing about interference of polarized light, as you describe it
that requires the use of a laser. I you are doing the typical quantum
interference experiment, all you have to do is to keep the light intensity
low enough so that no more than one photon is in the apparatus at any
instant. Photomultipliers can respond to single photons although a large
fraction of the photons will never be detected at all.

Bill

.

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