Simulating an all-optical quantum controlled-NOT gate using soliton scattering by a reflectionless potential well. (English) Zbl 1485.81020

Summary: We present a protocol for the quantum controlled-NOT gate which is based on two qubits operation by investigating the soliton scattering through a reflectionless potential well in an optical system. We consider the set up of two input solitons with different intensities scattered by a reflectionless potential wall with a control soliton placed at the center of the potential. The two input solitons correspond to the target qubit while either the presence or absence of control soliton in the potential well or the presence or absence of control potential well corresponds to the control qubit. We achieve the desired performance of the quantum logic gate by exploiting the intensity difference between the two input solitons and we find this to be possible within a finite width of a velocity of incidence for the two solitons. The calculation of transport coefficients ensures the feasibility of building a quantum controlled-NOT gate. This protocol demonstrates the prospect of soliton scattering by a potential well for quantum information processing. Especially, the setup with control potential as a control qubit allows realization of the CNOT operation with the negligible amount of radiation.


81P65 Quantum gates
35C08 Soliton solutions
81V80 Quantum optics
78A45 Diffraction, scattering
81Q93 Quantum control
57R67 Surgery obstructions, Wall groups
81-10 Mathematical modeling or simulation for problems pertaining to quantum theory
Full Text: DOI


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