Publications

Ion trap with attached molecular beam line 

2023

Fernandez-Gonzalvo, X., Keller, M., A fully fiber-integrated ion trap for portable quantum technologies. Science Reports, 13, 523 (2023). https://doi.org/10.1038/s41598-022-27193-9 

2022 

Barontini, G., Blackburn, L., Boyer, V., Butuc-Mayer, F., Calmet, X., Crespo López-Urrutia, J. R., Curtis, E. A., Darquié, B., Dunningham, J., Fitch, N. J., Morgan, E. M., Georgiou, K., Gill, P., Godun, R. M., Goldwin, J., Guarrera, V., Harwood, A. C., Hill, I. R., Hendricks, R. J.,  Jeong, M., Johnson, M. Y. H., Keller, M., Kozhiparambil Sajith, L. P., Kuipers, F., Margolis, H. S., Mayo, C., Newman, P., Parsons, A. O., Prokhorov, L., Robertson, B. I., Rodewald, J.,  Safronova, M. S., Sauer, B. E., Schioppo, M., Sherill, N., Stadnik, Y. V., Szymaniec, K., Tarbutt, M. R., Thompson, R. C., Tofful, A., Tunesi, J., Vecchio, A., Wang, Y., & Worm, S., Measuring the stability of fundamental constants with a network of clocks. EPJ Quantum Technology, 9(12) (2022). https://doi.org/10.1140/epjqt/s40507-022-00130-5

Keller, M., Cavity-QED with single trapped ions. Contemporary Physics, 63(1) (2022). https://doi.org/10.1080/00107514.2022.2118385

Keller, M., & Ward, T., Generation of time-bin-encoded photons in an ion-cavity system. New Journal of Physics, 24, 123028 (2022). New Journal of Physics, DOI 10.1088/1367-2630/aca9ee (2022)

Teixeira, W., Keller, M., & Semião, F., Pulsed multireservoir engineering for a trapped ion with applications to state synthesis and quantum Otto cycles. New Journal of Physics, 24, 023027 (2022). New Journal of Physics, DO! 10.1088/1367-2630/ac5131 (2022)

2021

Barontini, G., Boyer, V., Calmet, X., Fitch, N. J., Forgan, E. M., Godun, R. M., Goldwin, J., Guarrera, V., Hill, I. R., Jeong, M., Keller, M., Kuipers, F., Margolis, H. S., Newman, P., Prokhorov, L., Rodewald, J., Sauer, B. E., Schioppo, M., Sherrill, N., Tarbutt, M. R., Vecchio, A., & Worm, S., QSNET, a network of clocks for measuring the stability of fundamental constants. Proceedings 11881, Quantum Technology: Driving commercialisation of an Enabling science II (2021)https://doi.org/10.1117/12.2600493

2020

Blackburn, L., & Keller, M., The effect of the electric trapping field on state-selective loading of molecules into rf ion traps. Scientific Reports, 10, 18449 (2020). https://doi.org/10.1038/s41598-020-74759-6

Christoforou, C. M., Pignot, C., Kassa, E., Takahashi, H., & Keller, M., Enhanced ion–cavity coupling through cavity cooling in the strong coupling regime. Scientific Reports, 10, 15693 (2020). https://doi.org/10.1038/s41598-020-72796-9
The datasets for the figures are available on Figshare.

Peerzada, A., Jobson, C. M., Kassa, E., Morphew, J., Fernandez-Gonzalvo, X., & Keller, M., Versatile optical fiber feedthroughs for ultra-high vacuum applications. Vacuum,180, ISSN 0042-207X (2020). https://doi.org/10.1016/j.vacuum.2020.109542 

Savelli, G., Colonna, J-P., Keller, M., Coudrain, P., Wendler, D., Goeppert, J., Manoli, Y., Faucherand, P., & Royer, A., Integrated thermoelectric sensors based on quantum dot superlattice for thermal management applications. Journal of Physics D: Applied Physics, 53(44) (2020).  Journal of Physics D: Applied Physics, Volume 53, Number 44 (2020)

Takahashi, H., Kassa, E., Christoforou, C., & Keller, M., Strong coupling of a single ion to an optical cavity. Physical Review Letters, 124(1) (2020). https://doi.org/10.1103/PhysRevLett.124.013602

Walker, T., Kashanian, S., Ward, T., & Keller, M., Improving the indistinguishability of single photons from an ion-cavity system. Physical Review A, 102(3) (2020).  https://link.aps.org/doi/10.1103/PhysRevA.102.032616
The datasets for the figures are available here.

2019

Gardner, A., Softley, T., & Keller, M., Multi-photon ionisation spectroscopy for rotational state preparation of N+2.
Scientific Report, 9, 506 (2019). https://doi.org/10.1038/s41598-018-36783-5

2018

Foot, C. J., Trypogeorgos, D., Bentine, E., Gardner, A., & Keller, M., Two-frequency operation of a Paul trap to optimise confinement of two species of ions.
International Journal of Mass Spectrometry, 430, 117-125 (2018). https://doi.org/10.1016/j.ijms.2018.05.007

Kassa, E., Takahashi, H., Christoforou, C., & Keller, M., Precise positioning of an ion in an integrated Paul trap-cavity system using radiofrequency signals. Journal of Modern Optics, 65(5-6), 520-528 (2018). https://doi.org/10.1080/09500340.2017.1406158

Wagner, R., Guzman, F., Chijioke, A., Gulati, G., Keller, M., & Shaw, G., Direct measurement of radiation pressure and circulating power inside a passive optical cavity. Optica Express, 26(18) (2018). Optics Express 26, 23492-23506 (2018).

Walker, T., Miyanishi, K., Ikuta, R., Takahashi, H., Vartabi Kashanian, S., Tsujimoto, Y., Hayasaka, K., Yamamoto, T., Imoto, N., & Keller, M., Long-distance single photon transmission from a trapped ion via quantum frequency conversion. Physical Review Letters, 120(20) (2018).  https://doi.org/10.1103/PhysRevLett.120.203601

2017

Gulati, G. K., Takahashi, H., Podoliak, N., Horak, P., & Keller, M., Fiber cavities with integrated mode matching optics.
Scientific Reports 7, 5566 (2017). https://doi.org/10.1038/s41598-017-05729-8

Podoliak, N., Takahashi, H., Keller, M., & Horak, P.,  Harnessing the mode mixing in optical fiber-tip cavities. Journal of Physics B: Atomic, Molecular and Optical Physics, 50 (2017). https://doi.org/10.1088/1361-6455/aa640a

Takahashi, H., Kassa, E., Christoforou, C., & Keller, M., Cavity-induced anticorrelated photon-emission rates of a single ion. Physical Review A, 96(2) (2017). https://link.aps.org/doi/10.1103/PhysRevA.96.023824

Takahashi, H., Nevado, P., & Keller, M., Mølmer–Sørensen entangling gate for cavity QED systems. Journal of Physics B: Atomic, Molecular and Optical Physics, 50 (2017).  https://doi.org/10.1088/1361-6455/aa8743 

2016

Begley, S., Vogt, M., Kaur Gulati, G., Takahashi, H., & Keller M., Optimized multi-ion cavity coupling.
Physical Review Letters, 116(22), 223001 (2016). https://link.aps.org/doi/10.1103/PhysRevLett.116.223001

Márquez Seco, A., Takahashi, H., & Keller, M., Novel ion trap design for strong ion-cavity coupling. Atoms, 4(2) (2016).  https://doi.org/10.3390/atoms4020015

Podoliak, N., Takahashi, H., Keller, M., & Horak, P., Comparative numerical studies of ion traps with integrated optical cavities. Physical Review Applied, 6(4) (2016). https://link.aps.org/doi/10.1103/PhysRevApplied.6.044008

2015

Deb, N., Pollum, L. L., Smith, A. D., Keller, M., Rennick, C. J., Heazlewood, B, R., & Softley, T.P., Coulomb crystal mass spectrometry in a digital ion trap.
Physical Review A, 91(3) (2015).  https://link.aps.org/doi/10.1103/PhysRevA.91.033408

2014

Calmet, X., & Keller, M., Cosmological evolution of fundamental constants: From theory to experiment. Modern Physics Letters A, 30(22) (2014). https://doi.org/10.1142/S0217732315400283

Gardner, A., Sheridan, K., Groom, W., Seymour-Smith, N., & Keller, M., Precision spectroscopy technique for dipole-allowed transitions in laser-cooled ions. Applied Physics B, 117, 755-762 (2014). https://doi.org/10.1007/s00340-014-5891-1

Kajita, M., Gopakumar, G., Abe, M., Hada, M., & Keller, M., Test of mp/me changes using vibrational transitions in N2+.Physical Review A, 89(3) (2014). https://link.aps.org/doi/10.1103/PhysRevA.89.032509

Takahashi, H., Morphew, J., Oručević, F., Noguchi, A., Kassa, E., & Keller, M., Novel laser machining of optical fibers for long cavities with low birefringence. Optics Express, 22(25) 31317-31328 (2014). https://doi.org/10.1364/OE.22.031317

2013

Keller, M., Interfacing atoms and light - The smaller the stronger. Science (Perspective), 340(6137), 1175-1176 (2013).  https://doi.org/10.1126/science.1239500

Takahashi, H., Wilson, A., Riley-Watson, A., Orucevic, F., Seymour-Smith, N.,  Keller, M., & Lange, W., An integrated fiber trap for single-ion photonics. New Journal of Physics, 15 (2013). https://doi.org/10.1088/1367-2630/15/5/053011   

2012

Brama, E., Mortensen, A., Keller, M., & Lange, W., Heating rates in a thin ion trap for microcavity experiments. Applied Physics B, 107, 945-954 (2012). https://doi.org/10.1007/s00340-012-5091-9

Sheridan, K., Seymour-Smith, N., Gardner, A., & Keller, M., All-optical broadband excitation of the motional state of trapped ions. The European Physical Journey, 66, 289 (2012). https://doi.org/10.1140/epjd/e2012-30377-8

2011

Sheridan, K., & Keller., M., Weighing of trapped ion crystals and its applications. New Journal of Physics, 13 (2011). https://doi.org/10.1088/1367-2630/13/12/123002  

Sheridan, K., Lange, W., & Keller, M., All-optical ion generation for ion trap loading. Applied Physics B, 104, 755-761 (2011). https://doi.org/10.1007/s00340-011-4563-7 

2010

Seymour-Smith, N., Blythe, P., Keller, M., & Lange, W., Fast scanning cavity offset lock for laser frequency drift stabilization. Review of Scientific Instruments, 81, 075109 (2010) . https://doi.org/10.1063/1.3455830 

2007

Keller, M., Lange, B., Hayasaka, K., Lange, W., & Walther, H., Stable long-term coupling of a single ion to a cavity mode. Journal of Modern Optics, 54(11), 1607-1617 (2007). https://doi.org/10.1080/09500340600792911

2005

Keller, M., Lange, B., Hayasaka, K., Lange, W., & Walther, H., Long-term stability of continuous-wave emission from an ion-cavity system. The European Physical Journal, 32, 161-166 (2005). https://doi.org/10.1140/epjd/e2005-00017-9