Transition to Feyn 3.0

by: Chris Cave
(Feyn version 3.0 or newer)

With Feyn 3.0, a remote QLattice is no longer required. This release allows you to run 100% locally on your own computer using the improved, lighter, QLattice. This change improves all our user's experiences, and it especially benefits our academic researchers and users with highly-sensitive data. This is an important step in our ongoing quest of creating a new class of trustworthy AI that prioritizes privacy.

Code written in Feyn 2.x is compatible with Feyn 3.0 so the transition will be as easy as running

pip3 install feyn --upgrade

Some functions are deprecated and will produce warnings.

Changes

The main change that you will experience when using Feyn 3.0. is that instead of connecting to a QLattice you instantiate it.

ql = feyn.QLattice()

You no longer use the reset function to seed the QLattice. Instead, if you want reproducible results you should seed the QLattice when you instantiate it. Like this:

ql = feyn.QLattice(random_seed=42)

Except for these changes you can treat the QLattice object just as you did in previous versions of Feyn.

If you try to connect to a QLattice with connect_qlattice() you will be met with a deprecation warning and that you should use feyn.QLattice().

Community QLattices

QLattices are still available without charge for academic, personal and non-commercial use. By using it, you automatically accept our Terms and Conditions.

Commercial QLattices

Using Feyn and the QLattice for commercial purposes will require a license key. Please contact us for details on this.