Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-08-08
Phys.Rev. D73 (2006) 045014
Physics
High Energy Physics
High Energy Physics - Theory
10 pages
Scientific paper
10.1103/PhysRevD.73.045014
The star commutator of $:\phi(x) \star \phi(x):$ with $:\phi(y) \star \phi(y):$ fails to vanish at equal times and thus also fails to obey microcausality at spacelike separation even for the case in which $\theta^{0i}=0$. The failure to obey microcausality for this sample observable implies that this form of noncommutative field theory fails to obey microcausality in general. This result also holds for general fields and observables. We discuss possible responses to this problem.
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