| Autor: |
Koski, Jonne V., Landig, Andreas J., Russ, Maximilian, Abadillo-Uriel, José C., Scarlino, Pasquale, Kratochwil, Benedikt, Reichl, Christian, Wegscheider, Werner, Burkard, Guido, Friesen, Mark, Coppersmith, Susan N., Wallraff, Andreas, Ensslin, Klaus, Ihn, Thomas |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Nature Physics 16, 642-646 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41567-020-0862-4 |
| Popis: |
The implementation of circuit quantum electrodynamics allows coupling distant qubits by microwave photons hosted in on-chip superconducting resonators. Typically, the qubit-photon interaction is realized by coupling the photons to the electric dipole moment of the qubit. A recent proposal suggests storing the quantum information in the electric quadrupole moment of an electron in a triple quantum dot. The qubit is expected to have improved coherence since it is insensitive to dipolar noise produced by distant voltage fluctuators. Here we experimentally realize a quadrupole qubit in a linear array of three quantum dots in a GaAs/AlGaAs heterostructure. A high impedance microwave resonator coupled to the middle dot interacts with the qubit quadrupole moment. We demonstrate strong quadrupole qubit--photon coupling and observe improved coherence properties when operating the qubit in the parameter space where the dipole coupling vanishes. |
| Databáze: |
arXiv |
| Externí odkaz: |
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