Quantum lower bounds by entropy numbers

  • Authors:
  • Stefan Heinrich

  • Affiliations:
  • Department of Computer Science, University of Kaiserslautern, D-67653 Kaiserslautern, Germany

  • Venue:
  • Journal of Complexity
  • Year:
  • 2007

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Abstract

We use entropy numbers in combination with the polynomial method to derive a new general lower bound for the nth minimal error in the quantum setting of information-based complexity. As an application, we improve some lower bounds on quantum approximation of embeddings between finite dimensional L"p spaces and of Sobolev embeddings.