Spectroscopic estimation of the photon number for superconducting Kerr parametric oscillators
Keisuke Matsumoto, Aiko Yamaguchi, Tsuyoshi Yamamoto, Shiro Kawabata,, and Yuichiro Matsuzaki
TL;DR
This paper proposes a spectroscopic method to accurately estimate the photon number in superconducting Kerr parametric oscillators, which are key for quantum annealing, by coupling an ancillary qubit and measuring its spectrum.
Contribution
The paper introduces a novel spectroscopic technique using an ancillary qubit to estimate photon numbers in KPOs, enhancing control for quantum annealing applications.
Findings
Spectroscopic measurements on the ancillary qubit reveal photon number information.
Coupling an ancillary qubit enables non-invasive photon number estimation.
The method improves photon number control in Kerr parametric oscillators.
Abstract
Quantum annealing (QA) is a way to solve combinational optimization problems. Kerr nonlinear parametric oscillators (KPOs) are promising devices for implementing QA. When we solve the combinational optimization problems using KPOs, it is necessary to precisely control the photon number of the KPOs. Here, we propose a feasible method to estimate the photon number of the KPO. We consider coupling an ancillary qubit to the KPO and show that spectroscopic measurements on the ancillary qubit provide information on the photon number of the KPO.
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Taxonomy
TopicsQuantum Information and Cryptography · Advanced Fiber Laser Technologies · Photonic and Optical Devices