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  Brownian Motion, Chern-Simons Theory, and 2d Yang-Mills

de Haro, S., & Tierz, M. (2004). Brownian Motion, Chern-Simons Theory, and 2d Yang-Mills. Physics Letters B, 601(3-4), 201-208. Retrieved from http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TVN-4DD87YF-2-1&_cdi=5539&_user=42783&_orig=search&_coverDate=11%2F11%2F2004&_qd=1&_sk=993989996&view=c&wchp=dGLbVzb-zSkzk&md5=6faf2aeb7eb89cc2b2c24bec39db5dad&ie=/sdarticle.pdf.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4FC0-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4FC1-1
Genre: Journal Article

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 Creators:
de Haro, Sebastian1, Author
Tierz, Miguel, Author
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1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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 Abstract: We point out a precise connection between Brownian motion, Chern-Simons theory on S3, and 2d Yang-Mills theory on the cylinder. The probability of reunion for N vicious walkers on a line gives the partition function of Chern-Simons theory on S3 with gauge group U(N). The probability of starting with an equal-spacing condition and ending up with a generic configuration of movers gives the expectation value of the unknot. The probability with arbitrary initial and final states corresponds to the expectation value of the Hopf link. We find that the matrix model calculation of the partition function is nothing but the additivity law of probabilities. We establish a correspondence between quantities in Brownian motion and the modular S- and T-matrices of the WZW model at finite k and N. Brownian motion probabilitites in the affine chamber of a Lie group are shown to be related to the partition function of 2d Yang-Mills on the cylinder. Finally, the random-turns model of discrete random walks is related to Wilson's plaquette model of 2d QCD, and the latter provides an exact two-dimensional analog of the melting crystal corner. Brownian motion provides a useful unifying framework for understanding various low-dimensional gauge theories.

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Language(s): eng - English
 Dates: 2004-11-11
 Publication Status: Published in print
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Title: Physics Letters B
Source Genre: Journal
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Pages: - Volume / Issue: 601 (3-4) Sequence Number: - Start / End Page: 201 - 208 Identifier: -