Freiburg 2019 – scientific programme

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FM: Fall Meeting

FM 40: Poster: Quantum Computation: Hardware Platforms

FM 40.6: Poster

Tuesday, September 24, 2019, 16:30–18:30, Tents

Digital single-atom interferometer in a two-dimensional state-dependent optical lattice — •Gautam Ramola, Richard Winkelmann, Muhib Omar, Karthik Chandrashekara, Wolfgang Alt, Dieter Meschede, and Andrea Alberti — Institute for Applied Physics, Bonn, Germany

We demonstrate a single atom interferometer with a Caesium atom, localized on a two-dimensional state-dependent optical lattice, where we achieve robust and precise control over both the external and internal degrees of the freedom of the particle [1]. Such precise control over the atomic wave packet allows for nondestructive probing of microscopic quantum systems and measuring potential gradients at ultrashort length scales [2]. The two-dimensional state-dependent lattice enables us to enclose large areas between the interfering arms, while the trapped nature of the interferometer allows us to insert an arbitrary amount of probing time. Both these factors contribute to increasing the sensitivity of our interferometer, which is proportional to the space-time area enclosed. Furthermore, precise control over the atom’s position allows us to create arbitrary interferometric geometries, paving the way for implementing novel protocols to study multi particle interactions. One such proposal we plan to implement is the direct interferometric measurement of the exchange phase between two indistinguishable Caesium atoms [3].

[1]C. Robens et al.,Phys. Rev. A. 9, 034016 (2018)

[2]A. Steffen et al., Proc. Natl. Acad. Sci. USA 109, 9770 (2012).

[3]C. F. Roos et al., Phys. Rev. Lett. 119, 160401 (2017)