Quantum data storage method and device, quantum data reading method and device and computing equipment

Abstract

The invention discloses a quantum data storage method and device, a quantum data reading method and device and computing equipment, and relates to the field of quantum computers. The quantum data storage method comprises the following steps: acting a first quantum neural network on an initial state to obtain an output quantum state; calculating a loss function based on a target quantum state and the quantum state output by the first quantum neural network, whereinthe dimension of the first quantum neural network is related to the dimension of the target quantum state, and the loss function corresponds to the distance between the target quantum state and the quantum state output by the first quantum neural network; adjusting parameters of the first quantum neural network according to the loss function so as to carry out iterative training on the first quantum neural network until a preset iterative stop condition is reached; and storing the trained parameters of the first quantum neuralnetwork in hardware equipment. According to the embodiment of the invention, storage of quantum data can be realized.

Description

technical field [0001] The present application relates to the technical field of quantum computers, in particular to quantum data access technology, and in particular to a quantum data storage method, reading method, device and computing equipment. Background technique [0002] Quantum computer technology is developing rapidly. Quantum data or quantum state (quantum state) storage and reading technology will be used in quantum computing. Reading from a hard drive is one of the essential functions for building a quantum computer. [0003] At present, there are still large technical gaps in the storage and reading of quantum data. Since the quantum state cannot be copied when it is directly operated by a quantum computer, it is necessary to achieve the reproduction of the quantum state in an indirect way. For example, the density matrix of the target quantum state can be obtained through quantum tomography, which can be stored on a classical computer, and the density matrix ...

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Problems solved by technology

[0004] However, quantum tomographic processing needs to consume huge resources, and the resources consumed to obtain the density matrix of quantum states will increase exponentially with the increase of qubits (also known as qubits); and, even if the density matrix of quantum states is obtained, Complicated processing is required to design the corresponding quantum circuit, and it needs to be further compiled into a basic circuit suitable for quantum hardware. The above process will consume a lot of manpower and time resources, and the cost is high.

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