added pointer to

- Adriano Barenco, Charles H. Bennett, Richard Cleve, David P. DiVincenzo, Norman Margolus, Peter Shor, Tycho Sleator, John A. Smolin, Harald Weinfurter,
*Elementary gates for quantum computation*, Phys. Rev. A**52**(1995) 3457 [arXiv:quant-ph/9503016, doi:10.1103/PhysRevA.52.3457]

(here and in related entries, such as *CNOT*)

added these pointers:

Implementation of quantum logic gates on qbits realized via nucleon-spin, via pulse protocols in nuclear magnetic resonance-technology:

- Price, Somaroo, Tseng, Gore, Fahmy,, Havel, Cory:
*Construction and Implementation of NMR Quantum Logic Gates for Two Spin Systems*, Journal of Magnetic Resonance**140**2 (1999) 371-378 [doi;10.1006/jmre.1999.1851]

and analogously on electron-spin:

- M. Yu. Volkov and K. M. Salikhov,
*Pulse Protocols for Quantum Computing with Electron Spins as Qubits*, Appl Magn Reson**41**(2011) 145–154 [doi:10.1007/s00723-011-0297-2]

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added a minimum of an Idea-section

]]>added pointer to the original:

- David E. Deutsch,
*Quantum computational networks*, Proceedings of the Royal Society A,**425**1868 (1989) 73-90 [doi:10.1098/rspa.1989.0099, jstor:2398494]

and added the word “logic” to the page title

]]>a stub, to make links work

(This used to be a stub “quantum circuit” which I just quasi-duplicated at a more extensive entry *quantum circuit diagram*. But since *quantum gate* was already redirecting here – which is how I discovered/remembered that this entry exists – no harm is done by making that it’s new title.)