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

## Ancestors

## Incoming links

- Photonic quantum computer
- Quantum computer physical implementation
- Quantum computers as experiments that are hard to predict outcomes
- Quantum error correction
- Quantum logic gates are needed because you can't compute the matrix explicitly as it grows exponentially
- Spontaneous parametric down-conversion
- Two photon interference experiment
- Why it is hard to simulate quantum systems?