A Lower Bound on Entanglement-Assisted Quantum Communication Complexity

  • Ashley Montanaro
  • Andreas Winter
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4596)

Abstract

We prove a general lower bound on the bounded-error entanglement-assisted quantum communication complexity of Boolean functions. The bound is based on the concept that any classical or quantum protocol to evaluate a function on distributed inputs can be turned into a quantum communication protocol. As an application of this bound, we give a very simple proof of the statement that almost all Boolean functions on n + n bits have communication complexity linear in n, even in the presence of unlimited entanglement.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Ashley Montanaro
    • 1
  • Andreas Winter
    • 2
  1. 1.Department of Computer Science, University of Bristol, Bristol, BS8 1UB, U.K 
  2. 2.Department of Mathematics, University of Bristol, Bristol, BS8 1TW, U.K 

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