2009/03/03 by Dan Solomon, Solomon, Dan
Physics and Astronomy · #Quantum and Classical Electrodynamics #Cold Atom Physics and Bose-Einstein Condensates #Quantum chaos and dynamical systems
paper · pdf · doi:10.48550/arxiv.0903.0426
In quantum field theory, it is generally assumed that there is a lower bound to the energy, which is normally assumed to the the vacuum state. While this may be a reasonable assumption for a free field it is not necessarily the case for interacting fields. In this paper I will examine a "toy" model of a neutral scalar field interacting with a charged scalar field and show that there is no lower bound to the energy in this case.