کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10735999 | 1045165 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The observable algebra of lattice QCD
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
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چکیده انگلیسی
Quantum chromodynamics (QCD) is studied on a finite latticewithin the Hamiltonian approach. First, the field algebra AÎ as comprising a gluonic part, with basic building block being the crossed product C*-algebra C(G) âαG, and a fermionic (CAR-algebra) part generated by the quark fields, is discussed. By classical arguments, AÎ has a unique (up to unitary equivalence) irreducible representation. Next, the algebra OÎi of internal observables is defined as the algebra of gauge invariant fields, satisfying the Gauss law. In order to take into account correlations of field degrees of freedom insidewith the “rest of the world”, OÎi is tensorized with the algebra of gauge invariant operators at infinity. This way, the full observable algebra OÎ is constructed. It turns out that its irreducible representations are labelled by the â¤3-valued global gluonic boundary flux, leading to three inequivalent charge superselection sectors. By the global Gauss law, these can be labelled in terms of the global colour charge carried by quark fields.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reports on Mathematical Physics - Volume 55, Issue 2, April 2005, Pages 199-210
Journal: Reports on Mathematical Physics - Volume 55, Issue 2, April 2005, Pages 199-210
نویسندگان
J. Kijowski, G. Rudolph,