Abstract: A quantum data erasure method, system and device, and a readable storage medium. The method includes: acquiring an equal-probability quantum state system; measuring the equal-probability quantum state system to collapse the equal-probability quantum state system into a binary random number sequence; generating a corresponding random angle value according to the binary random number sequence; and performing a bitwise rotation operation on quantum data in a quantum device according to the random angle value to complete this quantum data erasure. In the present application, the introduction of a quantum true random number can ensure that erased data will not be recovered and reversely cracked, and is of great value in protecting data assets; moreover, randomly processed data still has the characteristics such as quantum coherence and quantum entanglement, and can be used in subsequent operations, whereby a time-consuming labor-intensive process of preparing a quantum system is not required every time.

Abstract: A distributed quantum computing simulation method and apparatus. The method includes: converting a quantum circuit to be simulated into a tensor network that is represented by an undirected graph, and segmenting the undirected graph into a plurality of sub-graphs by using a genetic algorithm that is based on operation resources of a distributed system; respectively performing, on sub-process nodes, tensor contraction and merging on the plurality of sub-graphs for connected tensors until only one tensor is left to finally obtain zero-order tensors of the plurality of sub-graphs at the same time; and acquiring and superposing the zero-order tensors of the plurality of sub-graphs from the sub-process nodes at the same time to determine a zero-order tensor of the undirected graph, and using the zero-order tensor of the undirected graph as a probability amplitude of a positive operator value measurement element, so as to perform quantum computing simulation.

Abstract: Provided are a method and apparatus for measuring the quantum decoherence degree, an electronic device and a computer-readable storage medium. The method includes: determining an initial quantum state and a point to be measured of a quantum system to be measured (S101); amplifying the amplitude of the quantum state of the point to be measured, and measuring a decoherence degree of the point to be measured (S102); and calculating a decoherence coefficient of the quantum system to be measured according to the decoherence degree (S103). According to the method for measuring the quantum decoherence degree, the amplitude of the quantum state of the point to be measured in the quantum system to be measured is amplified, and the probability of the point to be measured is obtained by means of measurement, so as to measure the decoherence degree of the point to be measured.

Abstract: A quantum data erasure method, system and device, and a readable storage medium. The method includes: acquiring an equal-probability quantum state system; measuring the equal-probability quantum state system to collapse the equal-probability quantum state system into a binary random number sequence; generating a corresponding random angle value according to the binary random number sequence; and performing a bitwise rotation operation on quantum data in a quantum device according to the random angle value to complete this quantum data erasure. In the present application, the introduction of a quantum true random number can ensure that erased data will not be recovered and reversely cracked, and is of great value in protecting data assets; moreover, randomly processed data still has the characteristics such as quantum coherence and quantum entanglement, and can be used in subsequent operations, whereby a time-consuming labor-intensive process of preparing a quantum system is not required every time.