Deutsch, Toffoli, and cnot Gates via Rydberg Blockade of Neutral Atoms
Xiao-Feng Shi · Physical Review Applied · 2018
Using only Deutsch gates, one could construct a quantum circuit to accomplish $a\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}y$ feasible quantum computation, but unfortunately a working Deutsch gate has remained out of reach, due to lack of a protocol. This study proposes an easily realizable Deutsch-gate protocol, based on the blockade interactions in $e.g.$ neutral Rydberg atoms. This protocol can be extended to realize the CNOT gate, as well as the Toffoli gate, which can be used in quantum error correction. Given the very broad applicability of these gates, this result is a significant advance in quantum information science.