Energy requirements for quantum computation
Julio R. Gea-Banacloche · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2003
A lower bound on the amount of energy needed to carry out an elementary logical operation on a qubit system, with a given accuracy and in a given time, has been recently postulated. This paper is an attempt to formalize this bound and explore the conditions under which it may be expected to hold. For a specific, important case (namely, when the control system is a quantized electromagnetic field) it is shown how one can extend this result to a generally stronger constraint on the minimum energy density required, per pulse.