Title
Computation at a distance
Abstract
We consider a model of computation motivated by possible limitations on quantum computers. We have a linear array of n wires, and we may perform operations only on pairs of adjacent wires. Our goal is to build a circuits that perform specified operations spanning all n wires. We show that the natural lower bound of n-1 on circuit depth is nearly tight for a variety of problems, and we prove linear upper bounds for additional problems. In particular, using only gates adding a wire (mod 2) into an adjacent wire, we can realize any linear operation in GL_n(2) as a circuit of depth 5n. We show that some linear operations require depth at least 2n+1.
Year
Venue
Keywords
2007
Chicago J. Theor. Comput. Sci.
model of computation,linear operator,upper bound,quantum physics,lower bound,quantum computer
Field
DocType
Volume
Linear operation,Discrete mathematics,Combinatorics,Upper and lower bounds,Quantum computer,Model of computation,Electronic circuit,Mathematics,Computation
Journal
2007
Citations 
PageRank 
References 
6
0.84
1
Authors
3
Name
Order
Citations
PageRank
Samuel A. Kutin1655.63
David Petrie Moulton2113.38
Lawren M. Smithline360.84