Are quantum walks the saviour of optical quantum computing?

Understand

Quantum walks have emerged as an interesting candidate for the implementation of quantum information processing protocols.

• Optical implementations of quantum walks have been demonstrated by various groups and some have received high-profile coverage.
• It is often claimed that quantum walks provide an avenue towards universal quantum computation.
• In this comment I wish to dispel some misconceptions surrounding the prospects of quantum walks as a route towards universal optical quantum computation.