A gate tunable transmon qubit in planar Ge
Sagi O, Crippa A, Valentini M, Janik M, Baghumyan L, Fabris G, Kapoor L, Hassani F, Fink JM, Calcaterra S, Chrastina D, Isella G, Katsaros G. A gate tunable transmon qubit in planar Ge. arXiv, 10.48550/arXiv.2403.16774.
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Author
Sagi, OliverISTA;
Crippa, AlessandroISTA 
;
Valentini, MarcoISTA;
Janik, MarianISTA;
Baghumyan, LevonISTA;
Fabris, GiorgioISTA;
Kapoor, LuckyISTA;
Hassani, FaridISTA ;
Fink, Johannes MISTA ;
Calcaterra, Stefano;
Chrastina, Daniel;
Isella, Giovanni
All
;
Valentini, MarcoISTA;
Janik, MarianISTA;
Baghumyan, LevonISTA;
Fabris, GiorgioISTA;
Kapoor, LuckyISTA;
Hassani, FaridISTA ;
Fink, Johannes MISTA ;
Calcaterra, Stefano;
Chrastina, Daniel;
Isella, Giovanni
All
Department
Grant
Abstract
Gate-tunable transmons (gatemons) employing semiconductor Josephson junctions
have recently emerged as building blocks for hybrid quantum circuits. In this
study, we present a gatemon fabricated in planar Germanium. We induce
superconductivity in a two-dimensional hole gas by evaporating aluminum atop a
thin spacer, which separates the superconductor from the Ge quantum well. The
Josephson junction is then integrated into an Xmon circuit and capacitively
coupled to a transmission line resonator. We showcase the qubit tunability in a
broad frequency range with resonator and two-tone spectroscopy. Time-domain
characterizations reveal energy relaxation and coherence times up to 75 ns. Our
results, combined with the recent advances in the spin qubit field, pave the
way towards novel hybrid and protected qubits in a group IV, CMOS-compatible
material.
Publishing Year
Date Published
2024-03-26
Journal Title
arXiv
Acknowledged SSUs
IST-REx-ID
Cite this
Sagi O, Crippa A, Valentini M, et al. A gate tunable transmon qubit in planar Ge. arXiv. doi:10.48550/arXiv.2403.16774
Sagi, O., Crippa, A., Valentini, M., Janik, M., Baghumyan, L., Fabris, G., … Katsaros, G. (n.d.). A gate tunable transmon qubit in planar Ge. arXiv. https://doi.org/10.48550/arXiv.2403.16774
Sagi, Oliver, Alessandro Crippa, Marco Valentini, Marian Janik, Levon Baghumyan, Giorgio Fabris, Lucky Kapoor, et al. “A Gate Tunable Transmon Qubit in Planar Ge.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2403.16774.
O. Sagi et al., “A gate tunable transmon qubit in planar Ge,” arXiv. .
Sagi O, Crippa A, Valentini M, Janik M, Baghumyan L, Fabris G, Kapoor L, Hassani F, Fink JM, Calcaterra S, Chrastina D, Isella G, Katsaros G. A gate tunable transmon qubit in planar Ge. arXiv, 10.48550/arXiv.2403.16774.
Sagi, Oliver, et al. “A Gate Tunable Transmon Qubit in Planar Ge.” ArXiv, doi:10.48550/arXiv.2403.16774.
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