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Trapped Ion Quantum Computing

Long-range entanglement for spin qubits via quantum Hall edge modes

arXiv
Authors: Samuel J. Elman, Stephen D. Bartlett, Andrew C. Doherty

Year

2017

Paper ID

44891

Status

Preprint

Abstract Read

~2 min

Abstract Words

108

Citations

N/A

Abstract

We propose and analyse a scheme for performing a long-range entangling gate for qubits encoded in electron spins trapped in semiconductor quantum dots. Our coupling makes use of an electrostatic interaction between the state-dependent charge configurations of a singlet-triplet qubit and the edge modes of a quantum Hall droplet. We show that distant singlet-triplet qubits can be selectively coupled, with gate times that can be much shorter than qubit dephasing times and faster than decoherence due to coupling to the edge modes. Based on parameters from recent experiments, we argue that fidelities above 99% could in principle be achieved for a two-qubit entangling gate taking as little as 20 ns.

Why This Paper Matters

  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2017 reference point for readers tracking recent quantum research.
  • We propose and analyse a scheme for performing a long-range entangling gate for qubits encoded in electron spins trapped in semiconductor quantum dots.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1706.09967 [2] arXiv https://arxiv.org/abs/1706.09967 [3] Publisher https://arxiv.org/abs/1706.09967

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