A 2D nearest-neighbor quantum architecture for factoring in polylogarithmic depth

  • Authors:
  • Paul Pham;Krysta M. Svore

  • Affiliations:
  • Quantum Theory Group, University of Washington, Seattle, WA;Quantum Architectures and Computation Group, Microsoft Research, Redmond, WA

  • Venue:
  • Quantum Information & Computation
  • Year:
  • 2013

Quantified Score

Hi-index 0.00

Visualization

Abstract

We contribute a 2D nearest-neighbor quantum architecture for Shor's algorithm to factor an n-bit number in O(log3 n) depth. Our implementation uses parallel phase estimation, constant-depth fanout and teleportation, and constant-depth carry-save modular addition. We derive upper bounds on the circuit resources of our architecture under a new 2D model which allows a classical controller and parallel, communicating modules. We provide a comparison to all previous nearest-neighbor factoring implementations. Our circuit results in an exponential improvement in nearest-neighbor circuit depth at the cost of a polynomial increase in circuit size and width.