Osaka University

Fujitsu Corporation

Kyoto University

Keisuke Fujii

Hirotaka Oshima

Masahiro Kitagawa

Jun Fujisaki

Makoto Negoro

Kosuke Mitarai

An information processing apparatus determines a combination of a first data qubit and a second data qubit that further reduces the energy represented by an energy equation. The energy equation includes first to third energy terms. The first energy term is used to identify the first data qubit on which a Z error has occurred. The second energy term is used to identify the second data qubit on which an X error has occurred. The third energy term reduces the energy as the number of data qubits each being a third data qubit on which both a Z error and an X error have simultaneously occurred increases. The information processing apparatus determines that a Y error has occurred on the third data qubit.

Error detection method and information processing apparatus

The quantum circuit learning device includes a signal input unit that provides a quantum circuit including plural quantum bits with an input signal, a signal acquisition unit that observes states of quantum bits that the quantum circuit includes and acquires an output signal based on the observed states, and an adjustment unit that adjusts a circuit parameter that defines a circuit configuration of the quantum circuit, using an output signal that the signal acquisition unit acquires and a cost function that is set based on a teacher signal corresponding to the output signal.

Quantum circuit learning device, quantum circuit learning method, and recording medium

Growing community of inventors

Kyoto, Japan

Keisuke Fujii