Quantum Fredkin and Toffoli gates on a versatile programmable silicon photonic chip

Quantum Fredkin and Toffoli gates on a versatile programmable silicon photonic chip

Blog Article

Abstract Quantum logic gates are backbones of quantum information processing (QIP), wherein the typical three-qubit Fredkin and Toffoli gates are essential Cat Food-Dry in quantum computation and communication.So far, the quantum Fredkin gate has only been demonstrated with pre-entangled input states in free-space optics, which limits its usage for independent input photons.Here, we put forward an exquisite scheme and experimentally perform a proof-of-principle demonstration of three-qubit Fredkin and Toffoli gates on a programmable quantum photonic chip.Our scheme can also be used to realize a series of other two-qubit quantum gates.

Our work sheds light on the merits of quantum photonic chip in implementing Bath quantum logic gates, and paves the way for advanced quantum chip processors.