Multi-level quantum noise spectroscopy
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Multi-level quantum noise spectroscopy. / Sung, Youngkyu; Vepsalainen, Antti; Braumuller, Jochen; Yan, Fei; Wang, Joel I-Jan; Kjaergaard, Morten; Winik, Roni; Krantz, Philip; Bengtsson, Andreas; Melville, Alexander J.; Niedzielski, Bethany M.; Schwartz, Mollie E.; Kim, David K.; Yoder, Jonilyn L.; Orlando, Terry P.; Gustavsson, Simon; Oliver, William D.
I: Nature Communications, Bind 12, Nr. 1, 967, 11.02.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Multi-level quantum noise spectroscopy
AU - Sung, Youngkyu
AU - Vepsalainen, Antti
AU - Braumuller, Jochen
AU - Yan, Fei
AU - Wang, Joel I-Jan
AU - Kjaergaard, Morten
AU - Winik, Roni
AU - Krantz, Philip
AU - Bengtsson, Andreas
AU - Melville, Alexander J.
AU - Niedzielski, Bethany M.
AU - Schwartz, Mollie E.
AU - Kim, David K.
AU - Yoder, Jonilyn L.
AU - Orlando, Terry P.
AU - Gustavsson, Simon
AU - Oliver, William D.
PY - 2021/2/11
Y1 - 2021/2/11
N2 - System noise identification is crucial to the engineering of robust quantum systems. Although existing quantum noise spectroscopy (QNS) protocols measure an aggregate amount of noise affecting a quantum system, they generally cannot distinguish between the underlying processes that contribute to it. Here, we propose and experimentally validate a spin-locking-based QNS protocol that exploits the multi-level energy structure of a superconducting qubit to achieve two notable advances. First, our protocol extends the spectral range of weakly anharmonic qubit spectrometers beyond the present limitations set by their lack of strong anharmonicity. Second, the additional information gained from probing the higher-excited levels enables us to identify and distinguish contributions from different underlying noise mechanisms. Engineering qubits with long coherence times requires the ability to distinguish multiple noise sources, which is not possible with typical two-level qubit sensors. Here the authors utilize the multiple level transitions of a superconducting qubit to characterize two common types of external noise.
AB - System noise identification is crucial to the engineering of robust quantum systems. Although existing quantum noise spectroscopy (QNS) protocols measure an aggregate amount of noise affecting a quantum system, they generally cannot distinguish between the underlying processes that contribute to it. Here, we propose and experimentally validate a spin-locking-based QNS protocol that exploits the multi-level energy structure of a superconducting qubit to achieve two notable advances. First, our protocol extends the spectral range of weakly anharmonic qubit spectrometers beyond the present limitations set by their lack of strong anharmonicity. Second, the additional information gained from probing the higher-excited levels enables us to identify and distinguish contributions from different underlying noise mechanisms. Engineering qubits with long coherence times requires the ability to distinguish multiple noise sources, which is not possible with typical two-level qubit sensors. Here the authors utilize the multiple level transitions of a superconducting qubit to characterize two common types of external noise.
U2 - 10.1038/s41467-021-21098-3
DO - 10.1038/s41467-021-21098-3
M3 - Journal article
C2 - 33574240
VL - 12
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 967
ER -
ID: 259106988