PT - JOURNAL ARTICLE
AU - Zhang, Yingwen
AU - Roux, Filippus S.
AU - Konrad, Thomas
AU - Agnew, Megan
AU - Leach, Jonathan
AU - Forbes, Andrew
TI - Engineering two-photon high-dimensional states through quantum interference
AID - 10.1126/sciadv.1501165
DP - 2016 Feb 01
TA - Science Advances
PG - e1501165
VI - 2
IP - 2
4099 - http://advances.sciencemag.org/content/2/2/e1501165.short
4100 - http://advances.sciencemag.org/content/2/2/e1501165.full
SO - Sci Adv2016 Feb 01; 2
AB - Many protocols in quantum science, for example, linear optical quantum computing, require access to large-scale entangled quantum states. Such systems can be realized through many-particle qubits, but this approach often suffers from scalability problems. An alternative strategy is to consider a lesser number of particles that exist in high-dimensional states. The spatial modes of light are one such candidate that provides access to high-dimensional quantum states, and thus they increase the storage and processing potential of quantum information systems. We demonstrate the controlled engineering of two-photon high-dimensional states entangled in their orbital angular momentum through Hong-Ou-Mandel interference. We prepare a large range of high-dimensional entangled states and implement precise quantum state filtering. We characterize the full quantum state before and after the filter, and are thus able to determine that only the antisymmetric component of the initial state remains. This work paves the way for high-dimensional processing and communication of multiphoton quantum states, for example, in teleportation beyond qubits.