On-chip unit configurable multi-protocol compatible quantum key distribution decoding integrated chip

Abstract

The invention discloses an on-chip unit configurable multi-protocol compatible quantum key distribution decoding integrated chip, including a first adjustable optical splitter, which is used to adjustably split the input optical signal and configure different quantum key distribution protocol decoding Requirements; the second adjustable optical splitter and the third adjustable optical splitter are used to adjustably split the input optical signal, and the structural parameters of the two are the same; the first optical delay line and the second optical delay line, both The structural parameters are the same, and are used to delay the input optical signal; the first phase modulator and the second phase modulator are used to adjust the phase of the input optical signal, and the structural parameters of the two are the same; the fourth adjustable optical splitter and the fifth adjustable The optical splitter is used to adjust the optical splitting of the input optical signal, and the structural parameters of the two are the same; each unit is an optical waveguide structure, and is integrated on the same substrate. The invention can meet the requirements of multi-protocol quantum key distribution and decoding, has compact structure, high integration degree and good stability, and is favorable for popularization and application at low cost.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to an on-chip unit configurable multi-protocol compatible quantum key distribution decoding integrated chip. Background technique [0002] Quantum communication is an interdisciplinary subject resulting from the combination of quantum mechanics and communication theory. Since its birth 30 years ago, it has transitioned from theoretical conception to practical application. With the development of quantum computers, classical encryption techniques are facing unprecedented challenges. In January 2018, Intel released a superconducting quantum test chip with 49 qubits at the Consumer Electronics Show in Las Vegas, USA. In March 2018, Google demonstrated the newly developed 72-qubit programmable superconducting quantum processor "Bristlecone", saying that this processor is expected to achieve "quantum superiority". In September 2019, IBM launched the world's first 53-bit q...

AI Technical Summary

Problems solved by technology

At present, the decoding end in the quantum key distribution system is mostly built with discrete optical components, which is large in size, complex in structure, poor in stability, and high in cost, and one decoding end only supports a single quantum key distribution protocol, which is flexible and adaptable. Therefore, it is urgent to design a multi-protocol compatible quantum key distribution decoding integrated chip with compact structure, high integration, good stability and low cost.

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