Universal quantum walk analog chip structure based on integrated optics
An analog chip and integrated optics technology, which is applied in the field of quantum computing and integrated optics, can solve the problems of limited control of elements and difficulty in meeting the application requirements of practical quantum walk calculations.
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[0028] The general quantum walk of two quantum particles starting from nodes 1 and 2 on the 8-node graph G simulates the optical chip structure, such as image 3 As shown, the chip structure is composed of two modules, the first half is the configurable entangled multi-photon source module I: entangled two-photon source, and the second half is the general linear optical network combination module II: two 8-dimensional general linear optical networks A and B, each optical network structure can realize the universal linear optical unitary transformation with fixed input ports (here 1, 2). The whole chip structure is controlled by 40 phase shifters. Using this chip structure to simulate indistinguishability γ, exchange symmetry φ, walk time t, walk Hamiltonian H G The two particles start from nodes 1 and 2, and when the distribution results after the quantum walk, the chip structure needs to be configured and operated as follows:
[0029] 1. Configure the 2 phase shifters S and...
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