Compare Papers
Paper 1
Experimental implementation of encoded logical qubit operations in a perfect quantum error correcting code.
Zhang J, Laflamme R, Suter D.
- Year
- 2012
- Journal
- Phys Rev Lett
- DOI
- 10.1103/physrevlett.109.100503
- arXiv
- -
No abstract.
Open paperPaper 2
Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in $^{171}$Yb$^{3+}$:Y$_2$SiO$_5$
Louis Nicolas, Moritz Businger, Théo Sanchez Meijia, Alexey Tiranov, Thierry Chanelière, Eloïse Lafitte-Houssat, Alban Ferrier, Philippe Goldner, Mikael Afzelius
- Year
- 2022
- Journal
- arXiv preprint
- DOI
- arXiv:2209.04196
- arXiv
- 2209.04196
The coherent interaction of solid-state spins with both optical and microwave fields provides a platform for a range of quantum technologies, such as quantum sensing, microwave-to-optical quantum transduction and optical quantum memories. Rare-earth ions with electronic spins are interesting in this context, but it is challenging to simultaneously and efficiently drive both optical and microwave transitions over a long crystal. In this work, we use a loop-gap microwave resonator to coherently drive optical and microwave clock transitions in $^{171}$Yb$^{3+}$:Y$_2$SiO$_5$, at close to zero external magnetic field. The low magnetic field regime is particularly interesting for interfacing these spin transitions with superconducting circuits. We achieve a Rabi frequency of 0.56 MHz at 2.497 GHz, over a 1-cm long crystal. Furthermore, we provide new insights into the spin dephasing mechanism at very low fields, showing that superhyperfine-induced collapse of the Hahn echo signal plays an important role at low fields. Our calculations and measurements reveal that the effective magnetic moment can be manipulated in $^{171}$Yb$^{3+}$:Y$_2$SiO$_5$, allowing to suppress the superhyperfine interaction at the clock transition. At a doping concentration of 2 ppm and a temperature of $3.4$ K, we achieve the longest spin coherence time of $10.0 \pm 0.4 ~\text{ms}$ reported in $^{171}$Yb$^{3+}$:Y$_2$SiO$_5$.
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