Photonic Toolbox for Quantum Simulation
Xiao‐Song Ma, Borivoje Dakić, Philip John Walther · Advances in chemical physics · 2014
Recently, various quantum simulators based on different quantum architectures are being successfully constructed, such as atoms, trapped ions, NMR, superconducting circuits, as well as single photons. For understanding molecular systems, quantum simulators are required to have very precise quantum control of the individual particles. Two main types of such quantum simulators are the analog and digital quantum simulators. Photons have the feature that they do not interact with anything easily, which provides the advantages and disadvantages for using them to realize quantum simulators. The advantageous side is a natural decoherence-free system that allows the implementations without complicated cryogenic experimental setups. Another advantage of photonic simulators is that photons are easily moved either in free space or waveguides and thus are not restricted to nearest–neighbor interaction. It has been proven that by using measurement induced interaction, one can circumvent the difficulty of photon–photon interaction and generate genuine many-body entangled photonic states.