Photons are (almost) supreme –
Another quantum computing architecture closes in on quantum supremacy.
Chris Lee –Dec (************************************************************, ******************************************** (6:******************************** pm UTC **************************
So, I accept the necessity of quantum supremacy — no one wants to pursue a dead end — but I still dislike what it’s doing to current research. Now, on to the news … Fire up the photon mixer
Google recently (published a paper
claiming to have demonstrated quantum supremacy (thoughnot everyone entirely agreedUnfortunately, I am not sure that this will gain the researchers as much as they hope. The heart of the system is a source of single photons, which produces millions of photons per second. The speed of calculation, however, is limited by that rate. So, yes, the researchers can extend the number of possible output combinations to well beyond what can be calculated classically. Unfortunately, their photon source may also prevent them from sampling the distribution in a reasonable time.
On a more personal note: sometimes I start reading a paper, and then I stop and give thanks that I am not the grad student who had toactually do that. This is one of those papers. The experiment here is one crazy setup!
Physical Review Letters, (**********************************************, DOI: (******************************************************************. / PhysRevLett.
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