= Photonic quantum computer
{wiki=Linear optical quantum computing}
= Linear optical quantum computing
{synonym}
{title2}
* https://en.wikipedia.org/wiki/Linear_optical_quantum_computing
* https://en.wikipedia.org/wiki/KLM_protocol
Uses <photons>!
The key experiment/phenomena that sets the basis for photonic quantum computing is the <two photon interference experiment>.
The physical representation of the information encoding is very easy to understand:
* input: we choose to put or not photons into certain wires or no
* interaction: two wires pass very nearby at some point, and photons travelling on either of them can jump to the other one and interact with the other photons
* output: the probabilities that photos photons will go out through one wire or another
\Video[http://youtube.com/watch?v=7wCBkAQYBZA]
{title=Jeremy O'Brien: "Quantum Technologies" by GoogleTechTalks (2014)}
{description=
This is a good introduction to a <photonic quantum computer>. Highly recommended.
* https://youtube.com/watch?v=7wCBkAQYBZA&t=1285 shows an experimental curve for a <two photon interference experiment> by Hong, Ou, Mandel (1987)
* https://youtube.com/watch?v=7wCBkAQYBZA&t=1440 shows a KLM <CNOT gate>
* https://youtube.com/watch?v=7wCBkAQYBZA&t=2831 discusses the <quantum error correction> scheme for photonic QC based on the idea of the "Raussendorf unit cell"
}