Finding room for antilinear terms in the Hamiltonian

Details Finding room for antilinear terms in the Hamiltonian Finding room for antilinear terms in the Hamiltonian

2012-04-05

arxiv.org/abs/1204.1309v1

Physics

Mathematical Physics

19 pages, 1 figure

Scientific paper

Although the Hamiltonian in quantum physics has to be a linear operator, it is possible to make quantum systems behave as if their Hamiltonians contained antilinear (i.e., semilinear or conjugate-linear) terms. For any given quantum system, another system can be constructed that is physically equivalent to the original one. It can be designed, despite the Wightman reconstruction theorem, so that antilinear operators in the original system become linear operators in the new system. Under certain conditions, these operators can then be added to the new Hamiltonian. The new quantum system has some unconventional features, a hidden degeneracy of the vacuum and a subtle distinction between the Hamiltonian and the observable of energy, but the physical equivalence guarantees that its states evolve like those in the original system and that corresponding measurements produce the same results. The same construction can be used to make time-reversal linear.

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