## Abstract

We analyze the control by electromagnetic fields of quantum systems with infinite dimensional Hilbert space and a discrete spectrum. Based on recent mathematical results, we rigorously show under which conditions such a system can be approximated in a finite dimensional Hilbert space. For a given threshold error, we estimate this finite dimension in terms of the used control field. As illustrative examples, we consider the cases of a rigid rotor and of a harmonic oscillator.

## Full Text

### Topics from this Paper

- Finite Dimensional Hilbert Space
- Infinite Dimensional Hilbert Space
- Dimensional Hilbert Space
- Discrete Spectrum
- Rigid Rotor + Show 5 more

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