8
votes
Accepted
How are two photons entangled in the Xanadu computer?
QML researcher at Xanadu here.
Our X-series chip produce entangled states by squeezing light and then combining it at beam splitters: those 'cables' are waveguides in a chip, which when they are close ...
- 196
3
votes
How to translate between continuous variable model and discrete model?
Here is a partial answer. In general, the connection between continuous and discrete variables gets pretty complicated... However, if you restrict yourself to Gaussian unitaries on the CV side, and ...
- 41
1
vote
Hong Mandel Effect - question on math of indistinguishability of photons
Your state is perfectly normalized if you use that $(a^\dagger)^2|0\rangle = \sqrt{2}|2\rangle$ (where $|0\rangle$ and $|2\rangle$ are normalized states): Its norm is
$$
(t^2-r^2)^2 + (\sqrt{2}tr)^2 + ...
- 7,684
1
vote
How to entangle 2 qubits using a polarizing beam splitter?
You get entanglement if you use single photons (or other types of nonclassical light) instead of coherent light.
Linear optical operations on coherent states never result in entanglement. Roughly ...
glS♦
- 26.4k
1
vote
Combining photons at a beam splitter and states tensorization
Finally, I am able to answer my own question.
From the (fantastic) video-lecture by Lakshmi Bala, the beam-splitter operator is like this
Also, I have come to adapt the result to my own calculations ...
- 11
Only top scored, non community-wiki answers of a minimum length are eligible