Quantum state swapping in optical quantum communication using mach–zehnder interferometer

الملخص EN

Quantum state swapping is required for long-distance quantum communication.

Quantum state swapping protocols are based on the quantum controlled-NOT (CNOT) or similar quantum logic operations, which are very difficult to implement experimentally.

Here we present a feasible scheme for the implementation of quantum state swapping based on planar light wave circuit (PLC) implementation of quantum CNOT gate.

This quantum gate is realized by using the Mach–Zehnder interferometer.

By using planar light wave circuit in implementation, the width of waveguides and the length of CNOT gate were 12 microns and 2.8 cm, respectively.