TY - JOUR
T1 - Nearly Quantum-Limited Josephson-Junction Frequency-Comb Synthesizer
AU - Lu, Pinlei
AU - Chien, Tzu Chiao
AU - Cao, Xi
AU - Lanes, Olivia
AU - Zhou, Chao
AU - Hatridge, Michael J.
AU - Khan, Saeed
AU - Türeci, Hakan E.
N1 - Funding Information:
This work was supported by the Charles E. Kaufman Foundation of the Pittsburgh Foundation, by the National Science Foundation (NSF) Grant No. PIRE-1743717, and by the Army Research Office under Grant No. W911NF-18-1-0144. The work of S.K. and H.E.T. was additionally supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award No. DE-SC0016011. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for government purposes notwithstanding any copyright notation herein.
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/4
Y1 - 2021/4
N2 - While coherently driven Kerr microcavities have rapidly matured as a platform for frequency-comb formation, such microresonators generally possess weak Kerr coefficients; consequently, triggering comb generation requires millions of photons to be circulating inside the cavity. This suppresses the role of quantum fluctuations in the dynamics of the comb. In this paper, we realize a minimal version of coherently driven Kerr-mediated microwave-frequency combs in the circuit quantum electrodynamics (cQED) architecture, where the fluctuations of the quantum vacuum are the primary limitation on comb coherence. We achieve a comb phase coherence of up to 35 μs, approaching the theoretical device quantum limit of 55 μs and vastly longer than the inherent lifetimes of the modes, of 13 ns. The ability within cQED to engineer stronger nonlinearities than optical microresonators, together with operation at cryogenic temperatures, and the excellent agreement of comb dynamics with quantum theory indicates a promising platform for the study of complex dynamics of quantum nonlinear systems.
AB - While coherently driven Kerr microcavities have rapidly matured as a platform for frequency-comb formation, such microresonators generally possess weak Kerr coefficients; consequently, triggering comb generation requires millions of photons to be circulating inside the cavity. This suppresses the role of quantum fluctuations in the dynamics of the comb. In this paper, we realize a minimal version of coherently driven Kerr-mediated microwave-frequency combs in the circuit quantum electrodynamics (cQED) architecture, where the fluctuations of the quantum vacuum are the primary limitation on comb coherence. We achieve a comb phase coherence of up to 35 μs, approaching the theoretical device quantum limit of 55 μs and vastly longer than the inherent lifetimes of the modes, of 13 ns. The ability within cQED to engineer stronger nonlinearities than optical microresonators, together with operation at cryogenic temperatures, and the excellent agreement of comb dynamics with quantum theory indicates a promising platform for the study of complex dynamics of quantum nonlinear systems.
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U2 - 10.1103/PhysRevApplied.15.044031
DO - 10.1103/PhysRevApplied.15.044031
M3 - Article
AN - SCOPUS:85104616472
SN - 2331-7019
VL - 15
JO - Physical Review Applied
JF - Physical Review Applied
IS - 4
M1 - 044031
ER -