Smolin, Lee (2001) Matrix models as nonlocal hidden variables theories. [Preprint]

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Abstract
It is shown that the matrix models which give nonperturbative definitions of string and M theory may be interpreted as nonlocal hidden variables theories in which the quantum observables are the eigenvalues of the matrices while their entries are the nonlocal hidden variables. This is shown by studying the bosonic matrix model at finite temperature, with T taken to scale as 1/N, with N the rank of the matrices. For large N the eigenvalues of the matrices undergo Brownian motion due to the interaction of the diagonal elements with the off diagonal elements, giving rise to a diffusion constant that remains finite as N goes to infinity. The resulting probability density and current for the eigenvalues are then found to evolve in agreement with the Schroedinger equation, to leading order in 1/N, with hbar proportional to the thermal diffusion constant for the eigenvalues. The quantum uctuations and uncertainties in the eigenvalues are then consequences of ordinary statistical uctuations in the values of the offdiagonal matrix elements. Furthermore, this formulation of the quantum theory is background independent, as the definition of the thermal ensemble makes no use of a particular classical solution. The derivation relies on Nelson's stochastic formulation of quantum theory, which is expressed in terms of a variational principle.
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Item Type:  Preprint  

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Keywords:  hidden variables theory, quantum gravity, foundations of quantum theory, string theory  
Subjects:  Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Quantum Mechanics Specific Sciences > Physics > Relativity Theory 

Depositing User:  Lee Smolin  
Date Deposited:  12 Jan 2002  
Last Modified:  07 Oct 2010 15:10  
Item ID:  528  
Subjects:  Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Quantum Mechanics Specific Sciences > Physics > Relativity Theory 

Date:  December 2001  
URI:  https://philsciarchive.pitt.edu/id/eprint/528 
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