Description |
We produce a Bose-Einstein condensate of 87Rb with an Atom-Chip. The Atom-Chip is also equipped with RF sources for coherent transfer of atoms between internal states in order to realize an atom interferometer [1]. We demonstrate a novel scheme for the tomographic reconstruction of atomic states that combines the inherent stability of the atom chip setup with the flexibility of optimization schemes [2]. This scheme allowed confirming of the superb control on parameters allowed by the experimental set-up and put it to use on improved control algorithms to realise arbitrary superposition states [3]. In the same set-up we can further control the available Hilbert space for quantum evolution exploiting Quantum Zeno dynamics [4]. Finally we show a possible route for controlling the coupling to an environment by experimentally demonstrating the stochastic Quantum Zeno effect; i.e. we prove an ergodicity relation between the survival probabilities of different stochastic series that respectively correspond to time and ensemble averages [5].
These experiments prove that Atom Chips can be ideal tools for the control of quantum dynamics opening a new way to realizing novel quantum logical gates. References [1] J. Petrovic, et al., New J. Phys. 15 (4), 043002 (2013) [2] C. Lovecchio, et al., New J. Phys. 17, 093024, (2015) [3] C. Lovecchio, et al., Phys. Rev. A 93, 010304(R) (2016) [4] F. Schaefer, et al., Nature Communications 5:3194 (2014) [5] S. Gherardini, et al., Quantum Sci. Technol. 2, 015007 (2017) |