Progress to photonic quantum computation | NextBigFuture.com

One of the goals of photonics is to implement photonic quantum computation. Quantum interference of single photons at a 50:50 beamsplitter is a key phenomenon in quantum physics and lies at the heart of linear optical quantum computation. Researchers have implemented high-visibility quantum interference of two single-photon topological boundary states in a photonic waveguide array. They engineered a time-varying Hamiltonian, controlling the band structure of the device and the spatial isolation of the topological states to implement a 50:50 beamsplitter. They showed that single photons localized to topological boundary states can undergo high-visibility quantum interference. They used a laser-written photonic