US 11,836,458 B2Granted

Calculating device

AssigneeKabushiki Kaisha Toshiba

InventorsTaro Kanao, Hayato Goto

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Abstract

According to one embodiment, a calculating device includes nonlinear oscillators, connectors, and a controller. One of the connectors connects at least two of the nonlinear oscillators. The nonlinear oscillators include first and second nonlinear oscillators. The first nonlinear oscillator includes a first circuit part and a first conductive member. The first circuit part includes first and second Josephson junctions. The second nonlinear oscillator includes a second circuit part and a second conductive member. The second circuit part includes third and fourth Josephson junctions. Numbers of the connectors connected to the first and second connectors are first and second numbers, respectively. The second number is greater than the first number. The controller performs 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 is different from the first signal.

Claims20

Dependent claims

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.

18 more elements

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 controlling the first and second signals to cause an absolute value of a first detuning of the first nonlinear oscillator to be less than an absolute value of a second detuning of the second nonlinear oscillator.

12 more elements

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 the 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,
a frequency of an alternating current component of the second signal being greater than a frequency of an alternating current component of the first signal.

11 more elements

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 direct current component being less than the first direct current component in the case where a first resonant frequency of the first nonlinear oscillator increases when a first direct current component of the first signal is increased and a second resonant frequency of the second nonlinear oscillator increases when a second direct current component of the second signal is increased,
the second direct current component being greater than the first direct current component in the case where the first resonant frequency decreases when the first direct current component is increased and the second resonant frequency decreases when the second direct current component is increased.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/012,716Filed 4 Sep 2020
Priority: JP 2020-02821721 Feb 2020
Published: US 2021/0263705 A126 Aug 2021
Granted: 5 Dec 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G06F 7/381
Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal…:…
G06N 10/40
Quantum computing, i.e. information processing based on quantum-mechanical phenomena: physical realisations or architectures of quantum processors…
G06F
Computing and data processing
G06N
AI and machine learning