Add fermionic to qubit mapping demo

[ddhawan11]

Title: Mapping fermionic Hamiltonian to qubit Hamiltonian

Summary:

Relevant references: Tranter, Andrew, et. al. "A comparison of the Bravyi-Kitaev and the Jordan-Wigner transformations for the quantum simulation of quantum _chemistry." Journal of chemical theory and computation 14.11 (2018): 5617-5630.

Possible Drawbacks:

Related GitHub Issues:

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If you are writing a demonstration, please answer these questions to facilitate the marketing process.

• GOALS — Why are we working on this now? Promote a new PL feature.

• AUDIENCE — Who is this for? Chemistry researcher

• KEYWORDS — What words should be included in the marketing post? Fermionic Mapping

• Which of the following types of documentation is most similar to your file? (more details here)

• [ ] Tutorial

• [x] Demo

• [ ] How-to

[KetpuntoG]

Hey @soranjh , Until next Monday, the master branch will continue with the previous version of pennylane. I recommend point to dev to be able to merge this week

[soranjh]

Hey @soranjh , Until next Monday, the master branch will continue with the previous version of pennylane. I recommend point to dev to be able to merge this week

It was originally based on master, we will fix this.

[github-actions[bot]]

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Deployment Info:

• Pull Request ID: 1077
• Deployment SHA: a7c96496fc23052c2d2593268852b2607555040d (The Deployment SHA refers to the latest commit hash the docs were built from)

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