The University of Southampton
×
Physics and Astronomy
Email:
P.Ledingham@soton.ac.uk

Dr Patrick Ledingham PhD

https://hqnlab.com/

Associate Professor 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).

Kaczmarek, Krzysztof T., Saunders, Dylan J., Sprague, Michael R., Kolthammer, W. Steven, Feizpour, Amir, Ledingham, Patrick M., Brecht, Benjamin, Poem, Eilon, Walmsley, Ian A. and Nunn, Joshua (2015) Ultrahigh and persistent optical depths of cesium in Kagomé-type hollow-core photonic crystal fibers. Optics Letters, 40 (23), 5582-5585. (doi:10.1364/OL.40.005582).

Maring, Nicolas, Kutluer, Kutlu, Cohen, Joachim, Cristiani, Matteo, Mazzera, Margherita, Ledingham, Patrick M. and De Riedmatten, Hugues (2014) Storage of up-converted telecom photons in a doped crystal. New Journal of Physics, 16, [113021]. (doi:10.1088/1367-2630/16/11/113021).

Gündogan, M., Kutluer, K., Ledingham, P. M., Mazzera, M. and de Riedmatten, H. (2014) A solid state spin-wave quantum memory for photonic time-Bin qubits. In 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference. OSA..

Tay, Jian Wei, Farr, Warrick G., Ledingham, Patrick M., Korystov, Dmitry and Longdell, Jevon J. (2013) Hybrid optical and electronic laser locking using slow light due to spectral holes. Physical Review A - Atomic, Molecular, and Optical Physics, 87 (6), [063824]. (doi:10.1103/PhysRevA.87.063824).

Gündoǧan, M., Mazzera, M., Ledingham, P. M., Cristiani, M. and De Riedmatten, H. (2013) Coherent storage of temporally multimode light using a spin-wave atomic frequency comb memory. New Journal of Physics, 15, [045012]. (doi:10.1088/1367-2630/15/4/045012).

Gündoǧan, M., Rieländer, D., Kutluer, K., Fekete, J., Ledingham, P. M., Mazzera, M., Cristiani, M. and De Riedmatten, H. (2013) Spin-wave storage of single photon level light fields in a doped solid. Kang, I., Reitze, D., Alic, N. and Hagan, D. (eds.) In Frontiers in Optics 2013. Optical Society of America.. (doi:10.1364/fio.2013.ftu1c.4).

Ledingham, Patrick M., Naylor, William R. and Longdell, Jevon J. (2012) Experimental realization of light with time-separated correlations by rephasing amplified spontaneous emission. Physical Review Letters, 109 (9), [093602]. (doi:10.1103/PhysRevLett.109.093602).

Gündǒgan, Mustafa, Ledingham, Patrick M., Almasi, Attaallah, Cristiani, Matteo and Riedmatten, Hugues De (2012) Quantum storage of a photonic polarization qubit in a doped crystal. In Research in Optical Sciences. OSA..

Gündoǧan, Mustafa, Ledingham, Patrick M., Almasi, Attaallah, Cristiani, Matteo and De Riedmatten, Hugues (2012) Quantum storage of a photonic polarization qubit in a solid. Physical Review Letters, 108 (19), [190504]. (doi:10.1103/PhysRevLett.108.190504).

McAuslan, D. L., Ledingham, P. M., Naylor, W. R., Beavan, S. E., Hedges, M. P., Sellars, M. J. and Longdell, J. J. (2011) Photon-echo quantum memories in inhomogeneously broadened two-level atoms. Physical Review A - Atomic, Molecular, and Optical Physics, 84 (2), [022309]. (doi:10.1103/PhysRevA.84.022309).

Ledingham, Patrick M., Naylor, William R., Longdell, Jevon J., Beavan, Sarah E. and Sellars, Matthew J. (2010) Nonclassical photon streams using rephased amplified spontaneous emission. Physical Review A - Atomic, Molecular, and Optical Physics, 81 (1), [012301]. (doi:10.1103/PhysRevA.81.012301).

Tay, Jian Wei, Ledingham, Patrick M. and Longdell, Jevon J. (2010) Coherent optical ultrasound detection with rare-earth ion dopants. Applied Optics, 49 (23), 4331-4334. (doi:10.1364/AO.49.004331).

Tay, Jian Wei, Ledingham, Patrick and Longdell, Jevon J. (2010) Ultrasound detection using dispersion due to spectral holes. In Frontiers in Optics 2010/Laser Science XXVI. Optica Publishing Group..

Kutluer, Kutlu, Pascual-Winter, María Florencia, Dajczgewand, Julian, Ledingham, Patrick M., Mazzera, Margherita, Chanelière, Thierry and De Riedmatten, Hugues (2016) Spectral-hole memory for light at the single-photon level. Physical Review A, 93 (4), [040302]. (doi:10.1103/PhysRevA.93.040302).

Munns, J. H.D., Qiu, C., Ledingham, P. M., Walmsley, I. A., Nunn, J. and Saunders, D. J. (2016) In situ characterization of an optically thick atom-filled cavity. Physical Review A, 93 (1), [013858]. (doi:10.1103/PhysRevA.93.013858).

Kaczmarek, K. T., Ledingham, P. M., Brecht, B., Feizpour, A., Thekkadath, G. S., Thomas, S. E., Munns, J. H.D., Saunders, D. J., Walmsley, I. A. and Nunn, J. (2017) QLad: A Noise-Free Quantum Memory for Broadband Light at Room Temperature. In 2017 Conference on Lasers and Electro-Optics (CLEO). Institute of Electrical and Electronics Engineers Inc. pp. 1-2 .

Munns, J. H.D., Thomas, S. E., Kaczmarek, K. T., Ledingham, P. M., Saunders, D. J., Nunn, J., Brecht, B. and Walmsley, I. A. (2017) Temporal-mode selection with a Raman quantum memory. In Frontiers in Optics, FiO 2017. vol. Part F66-FiO 20, OSA.. (doi:10.1364/FIO.2017.JW4A.16).

Nunn, J., Munns, J. H.D., Thomas, S., Kaczmarek, K. T., Qiu, C., Feizpour, A., Poem, E., Brecht, B., Saunders, D. J., Ledingham, P. M., Reddy, Dileep V., Raymer, M. G. and Walmsley, I. A. (2017) Theory of noise suppression in Λ -type quantum memories by means of a cavity. Physical Review A, 96 (1), [012338]. (doi:10.1103/PhysRevA.96.012338).

Hird, T. M., Thomas, S. E., Munns, J. H.D., Arjona, O. L., Gao, S., Nunn, J., Brecht, B., Saunders, D. J., Ledingham, P. M. and Walmsley, I. A. (2018) Engineering a noiseless and broadband Raman quantum memory for temporal mode manipulation. In Frontiers in Optics 2018. OSA.. (doi:10.1364/FIO.2018.JW3A.63).

Kaczmarek, K. T., Ledingham, P. M., Brecht, B., Thomas, S. E., Thekkadath, G. S., Lazo-Arjona, O., Munns, J. H.D., Poem, E., Feizpour, A., Saunders, D. J., Nunn, J. and Walmsley, I. A. (2018) High-speed noise-free optical quantum memory. Physical Review A, 97 (4), [042316]. (doi:10.1103/PhysRevA.97.042316).

Hird, T. M., Thomas, S. E., Munns, J. H.D., Brecht, B., Saunders, D. J., Nunn, J., Walmsley, I. A. and Ledingham, P. M. (2019) Noise suppression via atomic absorption in a Raman quantum memory. In Quantum Information and Measurement, QIM 2019. vol. Part F165-QIM 2, OSA.. (doi:10.1364/QIM.2019.T5A.76).

Gao, S., Lazo-Arjona, O., Brecht, B., Kaczmarek, K. T., Ledingham, P. M., Thomas, S. E., Nunn, J., Saunders, D. J. and Walmsley, I. A. (2019) Optimal coherent filtering for single photons. In Quantum Information and Measurement, QIM 2019. vol. Part F165-QIM 2, OSA.. (doi:10.1364/QIM.2019.S4A.3).

Gao, S., Lazo-Arjona, O., Brecht, B., Kaczmarek, K. T., Thomas, S. E., Nunn, J., Ledingham, P. M., Saunders, D. J. and Walmsley, I. A. (2019) Optimal Coherent Filtering for Single Noisy Photons. Physical Review Letters, 123 (21), [213604]. (doi:10.1103/PhysRevLett.123.213604).

Becker, Jonas N., Klatzow, James, Ledingham, Patrick M., Weinzetl, Christian, Kaczmarek, Krzysztof T., Saunders, Dylan J., Nunn, Joshua, Uzdin, Raam, Walmsley, Ian A. and Poem, Eilon (2019) Bending the rules: Quantum effects in the operation of a microscopic heat engine in diamond. In European Quantum Electronics Conference, EQEC_2019. vol. Part F143-EQEC , OSA..

Thomas, S. E., Hird, T. M., Munns, J. H.D., Brecht, B., Saunders, D. J., Nunn, J., Walmsley, I. A. and Ledingham, P. M. (2019) Raman quantum memory with built-in suppression of four-wave-mixing noise. Physical Review A, 100 (3), [033801]. (doi:10.1103/PhysRevA.100.033801).

Contact

Email: P.Ledingham@soton.ac.uk

Share this profile FacebookTwitterWeibo