US 11,836,458 B2
Calculating device
Taro Kanao, Kawasaki Kanagawa (JP); and Hayato Goto, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Sep. 4, 2020, as Appl. No. 17/012,716.
Claims priority of application No. 2020-028217 (JP), filed on Feb. 21, 2020.
Prior Publication US 2021/0263705 A1, Aug. 26, 2021
Int. Cl. G06F 7/38 (2006.01); G06N 10/00 (2022.01)
CPC G06F 7/381 (2013.01) [G06N 10/00 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A calculating device, comprising:
a plurality of nonlinear oscillators;
a plurality of connectors, one of the connectors connecting at least two of the nonlinear oscillators; and
a controller,
the nonlinear oscillators including a first nonlinear oscillator and a second nonlinear oscillator,
the first nonlinear oscillator including a first circuit part and a first conductive member,
the first circuit part including a first Josephson junction and a second Josephson junction,
the second nonlinear oscillator including a second circuit part and a second conductive member,
the second circuit part including a third Josephson junction and a fourth Josephson junction,
a number of the connectors connected to the first nonlinear oscillator being a first number,
a number of the connectors connected to the second nonlinear oscillator being a second number,
the second number being greater than the first number,
in a first period, the controller being configured to perform at least a first operation of supplying a first signal to the first conductive member and supplying a second signal to the second conductive member,
the second signal being different from the first signal,
in the first period, the controller setting the first and second signals to cause an absolute value of (p2−Δ2)/K2 to be less than an absolute value of (p1−Δ1)/K1,
p1 being an amount proportional to an amplitude of an alternating current component of a signal of the first nonlinear oscillator,
Δ1 being a difference between a resonant frequency of the first nonlinear oscillator and ½ of a frequency of the first signal,
K1 being an anharmonicity of the first nonlinear oscillator,
p2 being an amount proportional to an amplitude of an alternating current component of a signal of the second nonlinear oscillator,
Δ2 being a difference between a resonant frequency of the second nonlinear oscillator and ½ of a frequency of the second signal,
K2 being an anharmonicity of the second nonlinear oscillator.