Phys.og June 29, 2021
The challenge in optical quantum information processing has been the realization of two-qubit gates for photonic qubits due to the lack of highly efficient optical Kerr nonlinearities at the single-photon level. A team of researchers in the US (Washington University, University of Michigan) found that a high-fidelity frequency-encoded deterministic two-photon controlled-phase gate can be achieved by exploiting the strong photon-photon correlation enabled by photonic dimers, and the unique nonreciprocal photonic propagation in chiral quantum nanophotonic systems. They are testing the design to show that it can operate under moderate conditions. According to the researchers so far the results seem positive…read more. TECHNICAL ARTICLE
… deterministic, high-fidelity, two-bit quantum logic gate that takes advantage of a new form of light. This new logic gate is orders of magnitude more efficient than the current technology. Credit: Jung-Tsung Shen.