Spectroscopy of dipolar interactions in trapped-ion crystals

Chi Zhang

Trapped Rydberg ions are a novel platform for quantum information processing. This approach combines the advanced quantum control of trapped ions and the strong dipolar interaction of Rydberg atoms. In this thesis, a strong dipole-dipole interaction has been demonstrated and a sub-microsecond entangling gate has been implemented in a cold two-ion crystal. After minimizing the polarizability of the Rydberg state by microwave dressing and understanding the effect of the quadrupole radio-frequency trap,the entangling gate has been applied in a warm 12-ion crystal.

Richard Claude Thompson

Chi Zhang, Fabian Pokorny, Gerard T. Higgins +2 more

Trapped Rydberg ions are a novel approach for quantum information processing [1]. This idea merges two highly developed quantum technologies, trapped ions and Rydberg atoms, with advantages from both sides. In particular, it combines the precise quantum control of trapped ions and the strong dipolar interactions of Rydberg atoms [1-3]. For trapped ions, this technology promises to speed up entanglement operations and make them available in larger ion crystals.

Frank Schlawin

Daniel J. Larson, R.M. Jopson

Bela E. Bode, Edoardo Fusco, Rachel Nixon +3 more

High Resolution Image Download MS PowerPoint Slide We demonstrate by use of continuous wave- and pulse-electron paramagnetic resonance spectroscopy on oriented single crystals of magnetically dilute Yb III ions in Yb 0.01 Lu 0.99 (trensal) that molecular entangled two-qubit systems can be constructed by exploiting dipolar interactions between neighboring Yb III centers. Furthermore, we show that the phase memory time and Rabi frequencies of these dipolar-interaction-coupled entangled two-qubit systems are comparable to the ones of the corresponding single qubits.