Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.54: Poster
Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof
A quantum network node with crossed fiber cavities — •Gianvito Chiarella1, Manuel Brekenfeld1, Dominik Niemietz1, Pau Farrera1, Joseph D. Christesen1,2, and Gerhard Rempe1 — 1MPQ, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2NIST, Boulder, Colorado 80305, USA
Single atoms embedded in optical cavities have been proven to be a clean and fruitful experimental platform for the study of quantum information processing.
In recent years, limits on the reduction of the cavity mode volume imposed by traditional manufacturing processes of the cavity mirrors have been overcome with the introduction of Fabry-Perot fiber cavites (FFPCs) [1]. Beside small mode volumes and larger coupling rates, FFPCs also allow for new geometries due to their smaller dimensions that enables the increase of the number of independent cavity modes the atom can couple to.
We have set up a new experiment with single neutral atoms trapped at the center of two crossed FFPCs. Exploiting the possibilities provided by the new system, we have realized a quantum network node that couples to two spatially and spectrally distinct quantum channels. The node functions as a passive, heralded and high-fidelity quantum memory that requires neither amplitude- and phase-critical control fields [2] nor error-prone feedback loops [3] and is thus excellently suited for the realization of large-scale quantum networks and quantum repeaters.
[1] Hunger et al., New J. Phys. 12, 065038 (2010)
[2] Specht et al., Nature 473, 190 (2011)
[3] Kalb et al., Phys. Rev. Lett. 114, 220501 (2015)