公开(公告)号：US20250094850A1

公开(公告)日：2025-03-20

申请号：US18535714

申请日：2023-12-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Taewan KIM ,  Jeongho BANG ,  Kyunghyun BAEK ,  Yongsoo HWANG

IPC: G06N10/40 ,  G06F17/14

Abstract: Disclosed is a quantum circuit, which includes input qubit lines, auxiliary qubit lines, and an R(θ) gate layer connected to the input qubit lines and the auxiliary qubit lines, and the R(θ) gate layer performs a plurality of R(θ) gate operations at once based on input qubits of the input qubit lines and auxiliary qubits of the auxiliary qubit lines, and the quantum circuit outputs Fourier transform results with respect to the input qubits as output qubits, based on a result of the plurality of R(θ) gate operations, without additional R(θ) gate operations.

公开(公告)号：US20230097026A1

公开(公告)日：2023-03-30

申请号：US17903146

申请日：2022-09-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chungheon BAEK ,  BYUNG-SOO CHOI ,  Taewan KIM ,  Yongsoo HWANG

IPC: G06F30/327 ,  G06N10/80 ,  G06N10/40

Abstract: Disclosed is a quantum computing system including an input processing unit that performs a quantum dot qubit-based quantum computing operation based on a user input algorithm and input data including information for controlling an operation, and converts the user input algorithm into a gate-based transformation algorithm, an algorithm decomposition unit that generates an equivalent circuit corresponding to the transformation algorithm, a quantum circuit mapping unit that generates a modified equivalent circuit by rearranging qubits constituting the equivalent circuit, a driving signal generation unit that generates a driving signal for controlling the modified equivalent circuit, a computing execution unit that performs the quantum computing operation by applying the driving signal to the modified equivalent circuit and generates computing data, and an output unit that converts the computing data into logical data and outputs the logical data as result data.

公开(公告)号：US20190020345A1

公开(公告)日：2019-01-17

申请号：US16034073

申请日：2018-07-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Taewan KIM ,  Byung-Soo CHOI

IPC: H03K19/195 ,  G06N99/00 ,  H03K19/20

Abstract: The inventive concept relates to a quantum circuit that shifts the phase of a target qubit by π/2n−1 based on a control qubit. The quantum circuit may include a first auxiliary circuit, a rotation gate, and a second auxiliary circuit. The first auxiliary circuit converts the first qubit state into the second qubit state according to the entanglement of a control qubit, a target qubit, and an ancillary qubit having a |0> state. The rotation gate shifts the phase for some basis states of the second qubit state by π/2n−1, and converts the second qubit state to the third qubit state. The second auxiliary circuit converts the third qubit state to the fourth qubit state such that the phase of the target qubit is shifted by π/2n−1.