## Speedup of Iterated Quantum Search by Parallel Performance

**Yuri Ozhigov***Electronic mail address: y@oz.msk.ru.**Department of Applied Mathematics,**Moscow State University of Technology "Stankin,''**Vadkovsky per. 3a, 101472, Moscow, Russia*

#### Abstract

Given a sequence of boolean functions, each takes the value 1 at a single point of the form , . The length of all is , . It is shown how to find using simultaneous evaluations of functions of the form with an error probability of order . This is times faster than sequential applications of the Grover algorithm for quantum search. Evolutions of amplitudes in parallel quantum computations are approximated by systems of linear differential equations. Some advantage of simultaneous evaluations of all are discussed.