Freiburg 2019 – scientific programme

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FM: Fall Meeting

FM 41: Poster: Quantum Sensing

FM 41.1: Poster

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

Fast and high-fidelity motional state control of trapped ions — •Jan-Philipp Schröder, Matthias Wittemer, Frederick Hakelberg, Philip Kiefer, Daniel Rieländer, Ulrich Warring, and Tobias Schaetz — Department of Experimental Atomic, Molecular, and Optical Physics, University of Freiburg, Germany

Laser-cooled ions, trapped in radio-frequency potentials, are well established experimental systems for quantum simulations [1]. Here, we report on a hardware platform compound of Mg⁺ ions in a linear rf Paul trap. We manipulate and couple the ions electronic (pseudo spin-1/2) and motional (bosonic) states. Via resolved sideband cooling they are initialized in their motional ground state. As recently demonstrated, we can real-time control the ion’s storage potential and non-adiabatically evolve its ground state wavefunction into a squeezed motional state [2]. We make use of this quantum squeezed state by performing measurements of residual electric stray fields with enhanced sensitivity.

[1] H. Schmitz, et al., Appl. Phys. B (2009) 95: 195

[2] M. Wittemer, et al., arXiv:1903.05523 [quant-ph] (2019)