fix teleportation.py beamsplitter phase (to 0)

[jonschlipf]

Context:
The teleportation example fails to teleport the state. Setting the BS phase to 0 apparently fixes this for various numeric examples. The phase was 0 in the previous version of this example as well as the theory part of the html example in the docs.

Description of the Change:
The beam splitter phase in the teleportation example was set to 0.

Benefits:
The teleported state on q[2] can now be confirmed to have its probability distribution around the original state (via Wigner plots etc.).

Possible Drawbacks:
None

Related GitHub Issues:

[codecov]

Codecov Report

Merging #674 (906707f) into master (d17e119) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #674   +/-   ##
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  Coverage   98.29%   98.29%           
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  Files          75       75           
  Lines        9036     9036           
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  Hits         8882     8882           
  Misses        154      154           

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[thisac]

Thanks for finding this @jonschlipf! It is indeed correct and should be changed. Another option would be to negate the final Zgate; both work equally fine. 🙂

Don't forget to add an entry to the changelog as well as you name to the list of contributors.

[jonschlipf]

Thank you @thisac ! I modified the changelog with a bullet item and my name in the contributor list.

[thisac]

Fantastic! Thank you very much. Just one last comment, and then it's ready to be merged.

[thisac]

Thanks for the contribution @jonschlipf!