Physics – Quantum Physics
Scientific paper
2008-10-07
Physical Review D78, 125009 (2008)
Physics
Quantum Physics
13 pages
Scientific paper
10.1103/PhysRevD.78.125009
The generalized Weyl transform of index $\alpha$ is used to implement the time-slice definition of the phase space path integral yielding the Feynman kernel in the case of noncommutative quantum mechanics. As expected, this representation for the Feynman kernel is not unique but labeled by the real parameter $\alpha$. We succeed in proving that the $\alpha$-dependent contributions disappear at the limit where the time slice goes to zero. This proof of consistency turns out to be intricate because the Hamiltonian involves products of noncommuting operators originating from the non-commutativity. The antisymmetry of the matrix parameterizing the non-commutativity plays a key role in the cancelation mechanism of the $\alpha$-dependent terms.
Bemfica F. S.
Girotti H. O.
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