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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Quantum routing with fast reversals.

Aniruddha Bapat1,2, Andrew M Childs1,3,4, Alexey V Gorshkov1,2

  • 1Joint Center for Quantum Information and Computer Science, NIST/University of Maryland, College Park, Maryland 20742, USA.

Quantum (Vienna, Austria)
|August 8, 2023
PubMed
Summary
This summary is machine-generated.

We developed new quantum routing protocols that outperform traditional SWAP-based methods. Our algorithms achieve faster quantum routing times, offering a significant advantage for qubit permutations in quantum computing architectures.

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Area of Science:

  • Quantum Information Science
  • Quantum Computing Algorithms
  • Quantum Communication Protocols

Background:

  • Efficiently routing qubits is crucial for scalable quantum computation and communication.
  • Existing SWAP-based protocols face limitations in speed and scalability under interaction constraints.
  • Arbitrary qubit permutations are fundamental operations in quantum algorithms.

Purpose of the Study:

  • To develop novel methods for implementing arbitrary qubit permutations under interaction constraints.
  • To demonstrate a quantum advantage over existing SWAP-based routing protocols.
  • To improve quantum routing times for various quantum computing architectures and permutation types.

Main Methods:

  • Utilized protocols for rapidly reversing the order of qubits along a path.
  • Developed new algorithms for quantum routing with nearest-neighbor interactions on a path of length n.
  • Analyzed routing times for sparse permutations involving k qubits on paths and general graphs.

Main Results:

  • Achieved quantum routing times of at most (1-ϵ)n, outperforming SWAP-based protocols (n-1) on paths.
  • Demonstrated a quantum advantage over SWAP-based routing, with expected routing times approaching 2n/3 for random permutations.
  • Developed algorithms for sparse permutations with routing times of n/3 + O(k^2) on paths and 2r/3 + O(k^2) on graphs.

Conclusions:

  • The presented quantum routing methods offer a significant speedup compared to SWAP-based approaches.
  • These protocols provide improved quantum routing times for realistic quantum computing architectures like grids.
  • The findings pave the way for more efficient implementation of quantum algorithms requiring complex qubit permutations.