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DY: Fachverband Dynamik und Statistische Physik

DY 14: Quantum Coherence (joint session TT/DY)

DY 14.2: Vortrag

Montag, 18. März 2024, 16:45–17:00, H 3025

Efficiency of pulsed electron spin resonance protocols for quantum state storage with phosphorus donors in silicon — •Patricia Oehrl^{1, 2}, Nadezhda Kukharchyk^{1, 2, 3}, Kirill G. Fedorov^{1, 2, 3}, Rudolf Gross^{1, 2, 3}, and Hans Huebl^{1, 2, 3} — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Technical University of Munich, TUM School of Natural Sciences, Garching, Germany — ³Munich Center for Quantum Science and Technologies (MCQST), Munich, Germany

The storage of quantum states is considered to be a key element for the successful realization of a multimode quantum network [1]. Solid-state spin ensembles, such as phosphorus donors in silicon, offer exceptional coherence times and resonant transitions in the GHz range [2]. Therefore, they are promising candidates for the realization of quantum memories without frequency conversion techniques. Here, we present a hybrid system consisting of a superconducting lumped-element microwave resonator coupled to a phosphorus donor electron spin ensemble hosted in isotopically engineered silicon. We use continuous-wave spectroscopy complemented by pulsed excitation and time-domain detection techniques. To this end, we operate our hybrid system at millikelvin temperatures and moderate static magnetic fields. We investigate the performance of our hybrid system with regard to quantum memory applications by analyzing the storage efficiency based on various pulse shapes and sequences.

[1] M. Pompili et al., Science 372 (2021) 6539

[2] M. Steger et al., Science 336 (2012) 1280

Keywords: Spin Ensemble; Electron Spin Resonance; Quantum Memory