fix the bug in thermal loss for gaussian backend

XanaduAI / strawberryfields

Strawberry Fields is a full-stack Python library for designing, simulating, and optimizing continuous variable (CV) quantum optical circuits.

https://strawberryfields.ai

Apache License 2.0

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Open sylviemonet opened 1 month ago

sylviemonet commented 1 month ago

Context: The thermal loss factor was added to the full nmatrix of the object in the backend, but it shouldn't be.

Description of the Change: Rewrite the thermal loss.

Benefits:

Possible Drawbacks: the variable "k" doesn't have a type hint so it is considered as int here, which may cause problems in the future.

Related GitHub Issues: