How the various quantum gates are implemented physically in quantum computer?

I found this interesting article that talks about creating a Fredkin quantum gate (controlled SWAP) : https://advances.sciencemag.org/content/2/3/e1501531

I hope this can help you in your search.

You can find some information about gates implementation here in this article:

Realization of efficient quantum gates with a superconducting qubit-qutrit circuit

Although the proposed setup is rather experimental, it may give you some ideas how to implement gates on computers with superconducting qubits.

This playlist by QuTech Academy on the 'building blocks' of a quantum computer might offer some nice insights.

• Video $10$ & $11$ introduce spin qubits, with the second video specifically on the operations on spin qubits.

• Video $12$ & $13$ introduce NV centre qubits, with again the second video specifically on the operations on spin qubits.

• Video $14$ through $19$ introduce the widely used transmon qubits, with measurements, single-qubit operations and the two-qubit operation in separate videos.

• Video $20$ through $25$ introduce the concepts behind a majorana-based topological quantum computer, but so far there's little 'physical' about that (unfortunately)

Notable omissions include (as QuTech doesn't work on these technologies):

• Trapped ion systems. Check for instance this video by MIT Opencourseware for the basics.
• Photon-based systems, most notably the linear KLM model. Check the (wiki)link for the introduction on how the gates are implemented (hint: beam splitters and mirrors).

Of course there's also adiabatic-style quantum computers, but there you don't perform 'gates', you just tune the coupling between qubit neighbour pairs.