Parallel Low-Loss Measurement of Multiple Atomic Qubits
Minho Kwon, Matthew Ebert, Thad G Walker, Mark E. Saffman · Physical Review Letters · 2017
We demonstrate low-loss measurement of the hyperfine ground state of rubidium atoms by state dependent fluorescence detection in a dipole trap array of five sites. The presence of atoms and their internal states are minimally altered by utilizing circularly polarized probe light and a strictly controlled quantization axis. We achieve mean state detection fidelity of 97% without correcting for imperfect state preparation or background losses, and 98.7% when corrected. After state detection and correction for background losses, the probability of atom loss due to the state measurement is 98% probability.