Gaussian state preparation + debugging

[elib20]

• Bosonic backend now supports Thermal, Vac, Coherent, Squeezed, DispSqueezed, Gaussian state prep
• Minor debugging in homodyne/heterodyne, thermal_loss, mbsqueezing

Context: Adds gaussian state preparations to bosonic backend

Description of the Change:

• Bosonic backend now supports Thermal, Vac, Coherent, Squeezed, DispSqueezed, Gaussian state prep
• Minor debugging in homodyne/heterodyne, thermal_loss, mbsqueezing
• Comments out functions that are not currently implemented

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (gkps@52c5c3e). Click here to learn what that means. The diff coverage is n/a.

@@           Coverage Diff           @@
##             gkps     #522   +/-   ##
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  Coverage        ?   90.00%           
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  Files           ?       76           
  Lines           ?     8374           
  Branches        ?        0           
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  Hits            ?     7537           
  Misses          ?      837           
  Partials        ?        0           

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[nquesada]

Just left some minor comments. The parts about deleting qmat and Amat are not soo urgent.