Quantum convolution operator
The present disclosure provides a quantum convolution operator, comprising: a quantum state encoding module, a quantum entanglement module, a quantum convolution kernel module, a measuring module, and a computing module; the quantum state encoding module is configured to encode a current group of input data onto qubits; the quantum entanglement module is configured to associate quantum state information of different qubits; the quantum convolution kernel module is configured to extract feature information corresponding to the quantum state information; the measuring module is configured to measure a quantum state of a preset qubit and obtain a corresponding amplitude; the computing module is configured to compute a convolution result corresponding to the current group of input data according to the measured quantum state and its amplitude.
1. A quantum computer, comprising:
a processor; and
a memory having computer program stored thereon, wherein the computer program, when being run by the processor, implements a quantum convolution operator; wherein
the quantum convolution operator comprises: a quantum state encoding module, a quantum entanglement module, a quantum convolution kernel module, a measuring module, and a computing module; wherein
the quantum state encoding module is configured to encode a current group of input data onto qubits;
the quantum entanglement module comprises CNOT gates acting on two adjacent qubits, and is configured to associate quantum state information of different qubits via the CNOT gates;
the quantum convolution kernel module is configured to extract feature information corresponding to the quantum state information;
the measuring module is configured to measure a quantum state of a preset qubit and obtain a corresponding amplitude; and
the computing module is configured to compute a convolution result corresponding to the current group of input data according to the measured quantum state and its amplitude;
wherein the quantum convolution kernel module comprises a U3 gate of a quantum logic gate, wherein a unitary matrix of the U3 gate is:
R
(
α
,
β
,
γ
)
=
[
cos
(
α
2
)
-
e
i
γ
×
sin
(
α
2
)
e
i
β
×
sin
(
α
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e
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+
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cos
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]
wherein α, β, and γ are angular variables.
2. The quantum computer of claim 1 , wherein the quantum state encoding module comprises quantum logic gates; and
said “encode the current group of input data onto qubits”, comprises:
determining a variable parameter value in a quantum logic gate corresponding to the current group of input data, wherein the quantum logic gate supports dynamic modification of the variable parameter value.
3. The quantum computer of claim 1 , wherein the quantum convolution operator further comprises:
an updating module, configured to update a parameter value of a quantum state encoding module corresponding to the next group of input data according to a preset mapping relationship.
4. The quantum computer of claim 3 , wherein said “update a parameter value of a quantum state encoding module corresponding to the next group of input data according to a preset mapping relationship”, comprises:
according to a preset mapping relationship between the input data and quantum state encoding circuits of the quantum state encoding module, updating a quantum state encoding circuit corresponding to the next group of input data so as to obtain a new quantum state encoding circuit as an updated quantum state encoding module.
5. The quantum computer of claim 1 , wherein said “compute a convolution result corresponding to the input data according to the measured quantum state and its amplitude”, comprises:
according to the measured quantum state and its amplitude, computing a probability corresponding to when the preset qubit is in a preset quantum state as a convolution result corresponding to the current group of input data.
6. The quantum computer of claim 1 , wherein in the case where the quantum entanglement module and/or the quantum convolution kernel module comprises a quantum logic gate, a variable parameter value in the quantum logic gate is determined by pre-training.
7. The quantum computer of claim 1 , wherein the input data comprises: an image, natural language, or audio data.
8. The quantum computer of claim 1 , wherein the quantum state comprises a following quantum logic gate: an RX gate, an RY gate, an RZ gate, or an X gate.
9. The quantum computer of claim 1 , wherein the last CNOT gate acts on the last qubit and the first qubit.