Dispersive Qubit Readout with Intrinsic Resonator Reset
Artikel i vetenskaplig tidskrift, 2026
Measurement and readout speed impose limits for logical qubit and qudit performance in quantum computing. Here, we experimentally demonstrate a universal analytical method for designing bandwidthefficient dispersive readout pulses that intrinsically reset the resonator and extend it to multiple quantum states. The approach is based on universal analytical pulses and requires knowledge of the qubit and resonator parameters, but needs no direct optimization of the pulse shape, even when accounting for the nonlinearity of the system. When correcting for the Kerr nonlinearity, we find even more precise solutions to the speed-versus-photon-number trade-off, achieving 102 photon readout with reset to 10-2 within 3 kappa-1 duration and amplifier efficiency- and T1-limited assignment error around 0.6%. Results on qubits and qutrits validate the approach.
Författare
M. Jerger
Forschungszentrum Jülich
F. Motzoi
Forschungszentrum Jülich
Universität zu Köln
Y. Gao
RWTH Aachen University
C. Dickel
Universität zu Köln
L. Buchmann
Aarhus Universitet
Andreas Bengtsson
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Giovanna Sammarco Tancredi
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Christopher Warren
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Jonas Bylander
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
D. DiVincenzo
Forschungszentrum Jülich
R. Barends
RWTH Aachen University
P. A. Bushev
Forschungszentrum Jülich
PRX QUANTUM
2691-3399 (eISSN)
Vol. 7 3 033042Ämneskategorier (SSIF 2025)
Den kondenserade materiens fysik
Annan fysik
DOI
10.1103/z5x1-2mr9