The University of Southampton
Email:
P.Ledingham@soton.ac.uk

Dr Patrick Ledingham PhD

https://hqnlab.com/

Lecturer in Quantum Light and Matter

I received my Bachelor of Science in Physics (First Class Honours) from The University of Otago in 2007. I then went on to obtain my PhD from Otago in 2011 in Dr Jevon Longdell's team, where I developed and established new quantum light-matter protocols in rare-earth-ion-doped solids. I then undertook a postdoctoral position in Barcelona at the Institut de Ciències Fotòniques (ICFO) in Prof Hugues de Riedmatten's team working on quantum memories in solids until 2014, and then joined Prof Ian Walmsley's group at Oxford to work on broadband quantum memory protocols in warm vapours until 2020. I am currently a Lecturer in Quantum Light and Matter Group in the School of Physics and Astronomy at Southampton, where I lead the Hybrid Quantum Networks Laboratory.

My research interests lie in quantum light-matter interactions between atomic ensembles (based on rare-earth-ion-doped solids and alkali vapours) and single photons (generated from quantum dots and nonlinear media). My research aims to merge these disparate systems to form large-scale quantum photonic networks for the processing of quantum information over global distances.

Research

Research interests

Quantum Technologies

Quantum and Nonlinear Optics

Atomic and Solid-State Physics

Publications

Wright, Thomas, Francis-Jones, Robert J.A., Gawith, Corin, Becker, Jonas N., Ledingham, Patrick M., Smith, Peter G.R., Nunn, Joshua, Mosley, Peter J., Brecht, Benjamin and Walmsley, I.A. (2018) A two-way quantum interface for linking Sr+ transition at 422nm to the telecommunications C-band.

Wright, Thomas A., Francis-Jones, Robert J.A., Gawith, Corin, Becker, Jonas N., Ledingham, Patrick, Walmsley, Ian A, Brecht, Benjamin, Nunn, Joshua and Mosley, Peter J . (2018) Single-photon-level interface for linking Sr+ transition at 422nm with the telecommunications C-band. CLEO Applications and Technology 2018, , San Jose, United States. 13 - 18 May 2018. (doi:10.1364/CLEO_AT.2018.ATh3H.8).

Wright, Thomas A., Francis-Jones, Robert J.A., Gawith, Corin B.E., Becker, Jonas N., Ledingham, Patrick M., Smith, Peter G.R., Nunn, Joshua, Mosley, Peter J., Brecht, Benjamin and Walmsley, Ian A. (2018) Two-way photonic interface for linking the Sr+ transition at 422 nm to the telecommunication C band. Physical Review Applied, 10 (4), 1-8, [044012]. (doi:10.1103/PhysRevApplied.10.044012).

Walmsley, I.A., Nunn, J., Smith, B.J., Kolthammer, W.S., Saunders, D., Metcalf, B.J., Barz, S., Renema, J., Eckstein, A., Ledingham, Patrick M., Feizpour, A., Poem, E., Brecht, B., Chrzanowski, H., Humphreys, P.C., Clements, W., Kazcmarek, K., Munns, J.H.D., Qiu, C., Sprague, M.R., Gates, J.C. and Smith, P.G.R. (2016) Photonic networked quantum information technologies. In Frontiers in Optics 2016. OSA.. (doi:10.1364/FIO.2016.FTu5G.2).

Walmsley, I.A., Nunn, J., Smith, B.J., Kolthammer, W.S., Saunders, D., Metcalf, B.J., Barz, S., Renema, J., Eckstein, A., Ledingham, P., Feizpour, A., Poem, E., Brecht, B., Chrzanowski, H., Humphreys, P.C., Clements, W., Kazcmarek, K., Munns, J.H.D., Qiu, C., Gates, J.C. and Smith, P.G.R. (2016) Photonic quantum networks. JSAP-OSA Joint Symposia, , Niigata Japan. 13 - 16 Sep 2016.

Rieländer, Daniel, Kutluer, Kutlu, Ledingham, Patrick M., Gündoǧan, Mustafa, Fekete, Julia, Mazzera, Margherita and De Riedmatten, Hugues (2014) Quantum storage of heralded single photons in a praseodymium-doped crystal. Physical Review Letters, 112 (4), [040504]. (doi:10.1103/PhysRevLett.112.040504).

Gündoğan, Mustafa, Ledingham, Patrick M., Kutluer, Kutlu, Mazzera, Margherita and De Riedmatten, Hugues (2015) Solid state spin-wave quantum memory for time-bin qubits. Physical Review Letters, 114 (23), 1-5, [230501]. (doi:10.1103/PhysRevLett.114.230501).

Saunders, D. J., Munns, J. H. D., Champion, T. F. M., Qiu, C., Kaczmarek, K. T., Poem, E., Ledingham, P. M., Walmsley, I. A. and Nunn, J. (2016) Cavity-enhanced room-temperature broadband Raman memory. Physical Review Letters, 116 (9), 1-5, [090501]. (doi:10.1103/PhysRevLett.116.090501).

Klatzow, James, Becker, Jonas N., Ledingham, Patrick M., Weinzetl, Christian, Kaczmarek, Krzysztof T., Saunders, Dylan J., Nunn, Joshua, Walmsley, Ian A., Uzdin, Raam and Poem, Eilon (2019) Experimental demonstration of quantum effects in the operation of microscopic heat engines. Physical Review Letters, 122 (11), 1-6, [110601]. (doi:10.1103/PhysRevLett.122.110601).

Seri, Alessandro, Lenhard, Andreas, Rieländer, Daniel, Gündoğan, Mustafa, Ledingham, Patrick M., Mazzera, Margherita and de Riedmatten, Hugues (2017) Quantum correlations between single telecom photons and a multimode on-demand solid-state quantum memory. Physical Review X, 7 (2), [021028]. (doi:10.1103/PhysRevX.7.021028).

Main, D., Hird, T.M., Gao, S., Oguz, E., Saunders, D. J., Walmsley, I.A. and Ledingham, P. (2021) Preparing narrow velocity distributions for quantum memories in room-temperature alkali-metal vapors. Physical Review A, 103 (4), [043105]. (doi:10.1103/PhysRevA.103.043105).

Ledingham, Patrick (2021) Gigahertz-bandwidth optical memory in Pr3+:Y2SiO5. Optics Letters, 46 (12), 2948-2951. (doi:10.1364/OL.423642).

Beavan, S.E., Ledingham, P.M., Longdell, J.J. and Sellars, M.J. (2011) Photon echo without a free induction decay in a double-Λ system. Optics Letters, 36 (7), 1272-1274. (doi:10.1364/OL.36.001272).

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