385 results about "Quantum circuit" patented technology

Superconducting single flux quantum circuits are disclosed herein, each having at least one Josephson junction which will flip when the current through it exceeds a critical current. Bias current for the Josephson junction is provided by a biasing transformer instead of a resistor. The lack of any bias resistors ensures that unwanted power dissipation is eliminated.

A modular quantum computer architecture is developed with a hierarchy of interactions that can scale to very large numbers of qubits. Local entangling quantum gates between qubit memories within a single modular register are accomplished using natural interactions between the qubits, and entanglement between separate modular registers is completed via a probabilistic photonic interface between qubits in different registers, even over large distances. This architecture is suitable for the implementation of complex quantum circuits utilizing the flexible connectivity provided by a reconfigurable photonic interconnect network. The subject architecture is made fault-tolerant which is a prerequisite for scalability. An optimal quantum control of multimode couplings between qubits is accomplished via individual addressing the qubits with segmented optical pulses to suppress crosstalk in each register, thus enabling high-fidelity gates that can be scaled to larger qubit registers for quantum computation and simulation.

In an A / D converter having a single flux quantum circuit having a flux quantum as an information carrier, a superconducting amplifier circuit driven by an AC current, and a semiconductor circuit, the operations of the circuits are synchronized with each other and a data signal from the single flux quantum circuit is transmitted to the semiconductor circuit.An AC current as the power source of a superconducting amplifier circuit is inputted as a master clock signal to the single flux quantum circuit and the semiconductor circuit to synchronize the operations of the circuits with the master clock signal. The single flux quantum circuit has a clock signal frequency multiplier circuit, a demultiplexing circuit and a memory circuit.

The invention discloses a quantum error correction decoding method and a quantum error correction decoding device based on a neural network, and a chip, which relate to the technical field of artificial intelligence and quanta. The quantum error correction decoding method comprises the following steps of: acquiring error symptom information of a quantum circuit; performing block feature extractionon the error symptom information through using a neural network decoder to obtain feature information; and subjecting the feature information to fusion decoding processing through using the neural network decoder to obtain error result information, wherein the error result information is used for determining error data quantum bits and corresponding error types in the quantum circuit. According to the quantum error correction decoding method and the quantum error correction decoding device, a block feature extraction mode is adopted, the number of channels of the feature information obtainedby each feature extraction is reduced, and the input data of the next feature extraction is reduced, thereby being conductive to reducing the number of feature extraction layers in the neural networkdecoder, further reducing the depth of the neural network decoder, shortening the decoding time of the neural network decoder correspondingly, and satisfying the requirement of real-time error correction.