Accurate microwave control and real-time diagnostics of neutral-atom qubits

Worawarong Rakreungdet*, Jae Hoon Lee, Kim Fook Lee, Brian E. Mischuck, Enrique Montano, Poul S. Jessen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


We demonstrate accurate single-qubit control in an ensemble of atomic qubits trapped in an optical lattice. The qubits are driven with microwave radiation, and their dynamics tracked by optical probe polarimetry. Real-time diagnostics is crucial to minimize systematic errors and optimize the performance of single-qubit gates, leading to fidelities of 0.99 for single-qubit π rotations. We show that increased robustness to large, deliberately introduced errors can be achieved through the use of composite rotations. However, during normal operation the combination of very small intrinsic errors and additional decoherence during the longer pulse sequences precludes any significant performance gain in our current experiment.

Original languageEnglish (US)
Article number022316
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number2
StatePublished - Feb 13 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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