Inspired by the results of the Ising model within an imaginary external magnetic field, we introduce a transformation in quantum systems with a θ-vacuum term that amounts to a rescaling of z = cos θ/2. Making use of this transformation we are able to determine the order parameter as a function of θ. The approach is successfully tested in models with both broken and unbroken CP symmetry at θ = π.
Titolo: | theta-vacuum systems via real action simulations |
Autori: | |
Data di pubblicazione: | 2003 |
Rivista: | |
Abstract: | Inspired by the results of the Ising model within an imaginary external magnetic field, we introduce a transformation in quantum systems with a θ-vacuum term that amounts to a rescaling of z = cos θ/2. Making use of this transformation we are able to determine the order parameter as a function of θ. The approach is successfully tested in models with both broken and unbroken CP symmetry at θ = π. |
Handle: | http://hdl.handle.net/11697/11184 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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