
arXiv: 2109.12096
In this paper, we consider the transport properties of the class of limit-periodic continuum Schrödinger operators whose potentials are approximated exponentially quickly by a sequence of periodic functions. For such an operator H , and X_H(t) the Heisenberg evolution of the position operator, we show the limit of \frac{1}{t}X_H(t)\psi as t\to\infty exists and is nonzero for \psi\ne 0 belonging to a dense subspace of initial states which are sufficiently regular and of suitably rapid decay. This is viewed as a particularly strong form of ballistic transport, and this is the first time it has been proven in a continuum almost periodic non-periodic setting. In particular, this statement implies that for the initial states considered, the second moment grows quadratically in time.
Mathematics - Spectral Theory, Schrödinger operator, Schrödinger equation, almost periodic Schrödinger operators, ballistic transport, Time-dependent Schrödinger equations and Dirac equations, FOS: Mathematics, FOS: Physical sciences, Mathematical Physics (math-ph), Spectral Theory (math.SP), Mathematical Physics, Selfadjoint operator theory in quantum theory, including spectral analysis
Mathematics - Spectral Theory, Schrödinger operator, Schrödinger equation, almost periodic Schrödinger operators, ballistic transport, Time-dependent Schrödinger equations and Dirac equations, FOS: Mathematics, FOS: Physical sciences, Mathematical Physics (math-ph), Spectral Theory (math.SP), Mathematical Physics, Selfadjoint operator theory in quantum theory, including spectral analysis
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 3 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
