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CMEQIP TERMINATED

Cavity-mediated entanglement of trapped-ion qubit arrays for quantum information processing

Total Cost €

EC-Contrib. €

Partnership

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CMEQIP project word cloud

Explore the words cloud of the CMEQIP project. It provides you a very rough idea of what is the project "CMEQIP" about.

avenue apparatus returning entangle coupling arrays spaced gate quantum msca ion mode cooperativity pursue prof operates preventing gt cavity atoms individual scaling times chains performed mediating space enhancement photonically photonic interfaced coherence crowding correction mediated neutral group sr holds interactions gates spectrum oxford scalability trapped long fold qubits internal protocols trap achievable vuletic error vacuum benefits first separate entanglement ions interface 3d tolerant fidelity qubit shown emitted linear modes qip techniques photon coulomb reached employs attractive entangling zone indicate free shared nodes fault motional axis collective drive enhanced length fellow regime optical mit inefficient platform photons demonstration fidelities feasible crystals chain bus computing

Project "CMEQIP" data sheet

The following table provides information about the project.

Coordinator	THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD Organization address address: WELLINGTON SQUARE UNIVERSITY OFFICES city: OXFORD postcode: OX1 2JD website: www.ox.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	United Kingdom [UK]
Total cost	269˙857 €
EC max contribution	269˙857 € (100%)
Programme	1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
Code Call	H2020-MSCA-IF-2016
Funding Scheme	MSCA-IF-GF
Starting year	2018
Duration (year-month-day)	from 2018-11-01 to 2021-10-31

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD Organization address address: WELLINGTON SQUARE UNIVERSITY OFFICES city: OXFORD postcode: OX1 2JD website: www.ox.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	UK (OXFORD)	coordinator	269˙857.00
2	MASSACHUSETTS INSTITUTE OF TECHNOLOGY MASSACHUSETTS INSTITUTE OF TECHNOLOGY Organization address address: MASSACHUSETTS AVENUE 77 city: CAMBRIDGE postcode: 2139 website: n.a. contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	US (CAMBRIDGE)	partner	0.00

Map

Project objective

Long-coherence times, high-fidelity individual-ion control and entanglement-mediating Coulomb interactions make trapped-ion qubits a very attractive platform for quantum information processing (QIP). Entangling gates performed by coupling the internal states of ions in the same potential well via their shared motional mode have recently reached the high fidelities necessary for the implementation of quantum error correction protocols which can enable fault-tolerant QIP. However, scaling this type of gate up to long ion chains (>20 ions) is not feasible: large ion numbers lead to crowding of the motional mode spectrum of the chain, eventually preventing addressing of specific modes. Cavity-mediated ion-photon coupling is a promising avenue to scalability. Photons emitted into a shared cavity mode can be used as a quantum bus to entangle short ion arrays. If implemented between arrays of N ions, this photonic interface benefits from an N-fold enhancement of the ion-photon coupling. Strong collective coupling has been shown with neutral atoms and 3D ion crystals, but has not been performed in a system with individual-qubit control and Coulomb-mediated entanglement capabilities. Prof.Vuletic’s MIT group operates a multi-zone ion trap which holds several linear ion arrays (of up to 20 ions each) spaced along the trap axis and features an integrated optical cavity. Cooperativity measurements indicate that the strong-coupling regime should be achievable with this apparatus for cavity-mediated entanglement of arrays as short as 5 ions in length. As an MSCA fellow, I will use this trap to pursue the first demonstration of cavity-mediated entanglement of two spatially separate ion arrays. On returning to Oxford, I will implement cavity-enhanced ion-photon coupling between Sr ions in separate vacuum systems, as part of Oxford's drive to build photonically-interfaced quantum computing nodes, which currently employs inefficient free-space ion-photon coupling techniques.

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