6533b838fe1ef96bd12a477b
RESEARCH PRODUCT
Localization in a QFT Model
Giuseppe CompagnoFabrizio Buscemisubject
Statistics and ProbabilityCoupling constantPhysicsScalar (mathematics)Time evolutionoperatorsStatistical and Nonlinear PhysicsObservableQuantum nonlocalityTheoretical physicsClassical mechanicsquantum electrodynamicsphotonsQuantum field theoryScalar fieldQuantumMathematical Physicsdescription
Localization properties of a QFT model, consisting of a quantum scalar field interacting linearly with a classical localized source, are investigated using various approaches present in the literature. We evaluate, to any order of the field–matter coupling constant, the time evolution of average values of one-point localization observables and scalar product between the quantum field state of the evolving system and localized states. We show that the appearance of nonlocality can be connected to nonlocal properties of localized states used or to the fact that localization operators do not satisfy the microcausality principle and therefore does not imply the violation of causality.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-09-01 | Open Systems & Information Dynamics |