Notes for the Quantum Realist

a response to

*Realism and Objectivism in Quantum Mechanics*by Vassilios Karakostas, Forthcoming in*Journal for General Philosophy of Science*2012 (Vol. 43, Issue 1). Available at: http://www.springerlink.com/openurl.asp?genre=article&id=doi:10.1007/s10838-012-9173-5&cm_mmc=event-_-articleAuthor-_-onlineFirst-_-0Let there be quantum subsystems

*S*_{1},*S*_{2}, and supposed they've interacted. Then1) what is real for the measuring apparatus is no longer

*S*_{1}and*S*_{2}, but a*third*quantum system*S*_{3}If

*S*_{1}and*S*_{2}are represented by vectors on Hilbert spaces*H*_{S1}and*H*_{S2}, respectively, after interaction*S*_{3}is represented by a vector onIf {

*p*_{i}} are all of the properties of*S*_{1}and {*p*_{j}} are all of the properties of*S*_{2}, then*S*_{3}has strictly more properties than all of {*p*_{i}} and {*p*_{j}} together.Kochen-Specker yields one kind of contextuality

2) from a selection of possible measurements, some "properties" depend for their values on which of the measurements are eventually preformed (Kochen-Specker)

these are properties of the single combined quantum system - measuring apparatus.

I would add another kind of contextuality, Relationalism. What is real for the measuring apparatus is

*S*_{3}. At the same time,3) in a frame of reference in which the singlet particles have not yet interacted,

*S*_{3}is not realI'd also add

4) for the Realist, reality is non-local. However, non-locality in this specific sense is

*not*problematic. A pair of particles in the singlet state must, buy (1) above, be thought of as a single third system*S*_{singlet}, not the first particle system and the second particle system. Then, the relevant generalization of the Kochen-Specker theorem shows that this third system*S*_{singlet}does not posses the property of location-in-space-at-this-moment,*before measurement*by the measuring apparatus. As a result, one can't think of*S*_{singlet}as being contained within all of space, at this moment. There's nothing wrong with this if "space" is just the order relation of quantum interactions: it just means*S*_{singlet}hasn't interacted with the measuring apparatus yet, in a measurement on a Hilbert space in which one can express location.[note to self: qualia are not usually thought of as being contained within all of 3rd-person space.]

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