Penning-trap eigenfrequency measurements with optical radiofrequency detectors

Joaquín Berrocal, Alejandro Hernández, Íñigo Arrazola +5

We use an electric-dipole laser-driven transition to precisely measure the cyclotron-frequency ratios of the pairs ${}^{42}$Ca${}^{+}$-${}^{40}$Ca${}^{+}$, ${}^{44}$Ca${}^{+}$-${}^{40}$Ca${}^{+}$ and $^{4…