Joint ICTP/SISSA SP Seminar 28.03 at 11:00 a.m. @SISSA Via Bonomea: F. S. Cataliotti

[Condensed Matter Section]

JOINT ICTP/SISSA Statistical Physics Seminar

Tuesday 28 March at 11:00 a.m.

SISSA, room 128

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Speaker: F. S. Cataliotti (LENS)

Title: Quantum Control on an Atom Chip

Abstract:
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)

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