Entanglement distillation between solid-state quantum network nodes

doi:10.1126/science.aan0070

. 2017 Jun 2;356(6341):928-932.

doi: 10.1126/science.aan0070. Epub 2017 Jun 1.

Entanglement distillation between solid-state quantum network nodes

N Kalb^{1

2}, A A Reiserer^{1

2}, P C Humphreys^{1

2}, J J W Bakermans^{1

2}, S J Kamerling^{1

2}, N H Nickerson³, S C Benjamin⁴, D J Twitchen⁵, M Markham⁵, R Hanson^{1

2}

Affiliations

¹ QuTech, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
² Kavli Institute of Nanoscience, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
³ Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
⁴ Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
⁵ Element Six Innovation, Fermi Avenue, Harwell Oxford, Didcot, Oxfordshire OX11 0QE, UK.

PMID: 28572386
DOI: 10.1126/science.aan0070

Entanglement distillation between solid-state quantum network nodes

N Kalb et al. Science. 2017.

. 2017 Jun 2;356(6341):928-932.

doi: 10.1126/science.aan0070. Epub 2017 Jun 1.

Authors

N Kalb^{1

2}, A A Reiserer^{1

2}, P C Humphreys^{1

2}, J J W Bakermans^{1

2}, S J Kamerling^{1

2}, N H Nickerson³, S C Benjamin⁴, D J Twitchen⁵, M Markham⁵, R Hanson^{1

2}

Affiliations

¹ QuTech, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
² Kavli Institute of Nanoscience, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
³ Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
⁴ Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
⁵ Element Six Innovation, Fermi Avenue, Harwell Oxford, Didcot, Oxfordshire OX11 0QE, UK.

PMID: 28572386
DOI: 10.1126/science.aan0070

Abstract

The impact of future quantum networks hinges on high-quality quantum entanglement shared between network nodes. Unavoidable imperfections necessitate a means to improve remote entanglement by local quantum operations. We realize entanglement distillation on a quantum network primitive of distant electron-nuclear two-qubit nodes. The heralded generation of two copies of a remote entangled state is demonstrated through single-photon-mediated entangling of the electrons and robust storage in the nuclear spins. After applying local two-qubit gates, single-shot measurements herald the distillation of an entangled state with increased fidelity that is available for further use. The key combination of generating, storing, and processing entangled states should enable the exploration of multiparticle entanglement on an extended quantum network.

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Entanglement distillation between solid-state quantum network nodes

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Entanglement distillation between solid-state quantum network nodes

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