Quantum Bayesian Networks

June 24, 2016

Qubiter’s Excellent Adventure, an Out of Body Quantum Experience with IBM

Filed under: Uncategorized — rrtucci @ 9:20 pm

On the first week of May, 2016, IBM released, to much fanfare, on the cloud access to a 5 qubit, gate model quantum computer. And with a very nice graphical interface and accompanying simulator to boot, so you can compare the experimental results to the theoretical ones (neglecting noise). They call their service “Quantum Experience” (QE as in Queen Elizabeth, very pro British). You can join QE and use it yourself here The service is free and available to everyone.

I haven’t been blogging too much lately because I’ve very been busy programming my newest project and raising Cain with my silly jokes on Twitter, but it would be a crime if I didn’t write something about this historic for quantum computing release. So here we go.

Much has been written about QE already. Some “experimental” papers have been submitted to arXiv (for example,
https://arxiv.org/abs/1605.04220
https://arxiv.org/abs/1605.05709
https://arxiv.org/abs/1605.08922
https://arxiv.org/abs/1511.00267 ).
Not exactly Fermi caliber experiments, but certainly fun and educational to some. Also, some programmers have written their own simulators and put them on github
(for example, Ganesh, Corbett, Bengualid, and many others)

As my own contribution to all this lively, welcomed activity, I uploaded to Qubiter’s github repo

this script

The script illustrates how to use Qubiter to simulate QE. It outputs

a Picture file and
an English file

for a simple quantum circuit that uses all the gates and only the gates currently realizable by QE. The script also writes on the Python console the probabilities of each of the 5 qubits at the end of the evolution specified by the given initial state vector and quantum circuit.

Of course, Qubiter is capable of simulating much more complicated quantum circuits. This is like a “Hello World” exercise for it. Qubiter is so powerful that it is already capable of simulating the Matrix v0.01. Okay, I’m exaggerating just a little bit. At present, Qubiter can do quantum Fourier transforms, quantum phase estimation, and quantum chemistry (finding ground state energies of simple molecules)

1 Comment »

  1. Update:
    For more recent information about IBM Quantum Experience, check out their friendly forum
    https://quantumexperience.ng.bluemix.net/qstage/#/community

    Comment by rrtucci — September 18, 2016 @ 3:08 pm


RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Blog at WordPress.com.

%d bloggers like this: