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Prof. Dr.  Klemens Johannes Hammerer

https://orcid.org/0000-0002-7179-0666
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Publications

  1. 2022
  2. Published

    Ab initio quantum theory of mass defect and time dilation in trapped-ion optical clocks

    Martinez-Lahuerta, V. J., Eilers, S., Mehlstaeubler, T. E., Schmidt, P. O. & Hammerer, K., 3 Sept 2022, In: Physical Review A. 106, 3, 032803.

    Research output: Contribution to journal › Article › Research › peer review

  3. E-pub ahead of print

    Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles

    Roth, A., Hammerer, K. & Tikhonov, K. S., 10 May 2022, (E-pub ahead of print).

    Research output: Working paper/Preprint › Preprint

  4. 2021
  5. Published

    Quantum Variational Optimization of Ramsey Interferometry and Atomic Clocks

    Kaubruegger, R., Vasilyev, D. V., Schulte, M., Hammerer, K. & Zoller, P., 6 Dec 2021, In: Physical Review X. 11, 4, 041045.

    Research output: Contribution to journal › Article › Research › peer review

  6. Published

    Tailored optical clock transition in 40Ca+

    Pelzer, L., Dietze, K., Kramer, J., Dawel, F., Krinner, L., Spethmann, N., Martinez, V., Aharon, N., Retzker, A., Hammerer, K. & Schmidt, P. O., Dec 2021, In: Measurement: Sensors. 18, 100326.

    Research output: Contribution to journal › Article › Research › peer review

  7. Published

    Unraveling Two-Photon Entanglement via the Squeezing Spectrum of Light Traveling through Nanofiber-Coupled Atoms

    Hinney, J., Prasad, A. S., Mahmoodian, S., Hammerer, K., Rauschenbeutel, A., Schneeweiss, P., Volz, J. & Schemmer, M., 14 Sept 2021, In: Physical Review Letters. 127, 12, 123602.

    Research output: Contribution to journal › Article › Research › peer review

  8. Published

    Quantum logic inspired techniques for spacetime-symmetry tests with (anti-)protons

    Cornejo, J. M., Lehnert, R., Niemann, M., Mielke, J., Meiners, T., Bautista-Salvador, A., Schulte, M., Nitzschke, D., Borchert, M. J., Hammerer, K., Ulmer, S. & Ospelkaus, C., 29 Jul 2021, In: New journal of physics. 23, 7, 073045.

    Research output: Contribution to journal › Article › Research › peer review

  9. Published

    Twin-lattice atom interferometry

    Gebbe, M., Siemß, J., Gersemann, M., Müntinga, H., Herrmann, S., Lämmerzahl, C., Ahlers, H., Gaaloul, N., Schubert, C., Hammerer, K., Abend, S., Ertmer, W. & Rasel, E. M., 5 May 2021, In: Nature Communications. 12, 1, 2544.

    Research output: Contribution to journal › Article › Research › peer review

  10. Published

    Inertial sensing with quantum gases: a comparative performance study of condensed versus thermal sources for atom interferometry

    Hensel, T., Loriani, S., Schubert, C., Fitzek, F., Abend, S., Ahlers, H., Siemß, J. N., Hammerer, K., Rasel, E. M. & Gaaloul, N., 22 Mar 2021, In: European Physical Journal D. 75, 108.

    Research output: Contribution to journal › Article › Research › peer review

  11. Published

    Inertial sensing with quantum gases

    Hensel, T. A., Loriani, S., Schubert, C., Fitzek, F., Abend, S., Ahlers, H., Siemß, J. N., Hammerer, K., Rasel, E. M. & Gaaloul, N., 2021, Proceedings of the 55th Rencontres de Moriond : 2021 Gravitation. Auge, E., Dumarchez, J. & Tran Thanh Van, J. (eds.). p. 33-36 4 p. (Proceedings of the 55th Rencontres de Moriond - 2021 Gravitation).

    Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

  12. 2020
  13. Published

    Universal atom interferometer simulation of elastic scattering processes

    Fitzek, F., Siemß, J. N., Seckmeyer, S., Ahlers, H., Rasel, E. M., Hammerer, K. & Gaaloul, N., 17 Dec 2020, In: Scientific Reports. 10, 1, 22120.

    Research output: Contribution to journal › Article › Research › peer review

  14. Published

    Correlating photons using the collective nonlinear response of atoms weakly coupled to an optical mode

    Prasad, A. S., Hinney, J., Mahmoodian, S., Hammerer, K., Rind, S., Schneeweiss, P., Sørensen, A. S., Volz, J. & Rauschenbeutel, A., Dec 2020, In: Nature Photonics. 14, 12, p. 719–722 4 p.

    Research output: Contribution to journal › Article › Research › peer review

  15. Published

    Prospects and challenges for squeezing-enhanced optical atomic clocks

    Schulte, M., Lisdat, C., Schmidt, P. O., Sterr, U. & Hammerer, K., 24 Nov 2020, In: Nature Communications. 11, 1, 5955.

    Research output: Contribution to journal › Article › Research

  16. Published

    Spin squeezing can only improve clocks with small atom number

    Schulte, M., Lisdat, C., Schmidt, P. O., Sterr, U. & Hammerer, K., 24 Nov 2020, In: Nature Communications. 11, 13 p., 5955.

    Research output: Contribution to journal › Article › Research › peer review

  17. Published

    ELGAR: a European Laboratory for Gravitation and Atom-interferometric Research

    Canuel, B., Abend, S., Amaro-Seoane, P., Badaracco, F., Beaufils, Q., Bertoldi, A., Bongs, K., Bouyer, P., Braxmaier, C., Chaibi, W., Christensen, N., Fitzek, F., Flouris, G., Gaaloul, N., Gaffet, S., Alzar, C. L. G., Geiger, R., Guellati-Khelifa, S., Hammerer, K., Harms, J., Hinderer, J., Junca, J., Katsanevas, S., Klempt, C., Kozanitis, C., Krutzik, M., Landragin, A., Roche, I. L., Leykauf, B., Lien, Y. -., Loriani, S., Merlet, S., Merzougui, M., Nofrarias, M., Papadakos, P., Pereira, F., Peters, A., Plexousakis, D., Prevedelli, M., Rasel, E., Rogister, Y., Rosat, S., Roura, A., Sabulsky, D. O., Schkolnik, V., Schlippert, D., Schubert, C., Sidorenkov, L., Siemß, J. -., Sopuerta, C. F., Sorrentino, F., Struckmann, C., Tino, G. M., Tsagkatakis, G., Viceré, A., Klitzing, W. V., Woerner, L. & Zou, X., 28 Oct 2020, In: Classical and Quantum Gravity. 37, 22, 92 p., 225017.

    Research output: Contribution to journal › Article › Research › peer review

  18. Published

    Analytic theory for Bragg atom interferometry based on the adiabatic theorem

    Siemß, J., Fitzek, F., Abend, S., Rasel, E. M., Gaaloul, N. & Hammerer, K., 10 Sept 2020, In: Physical Review A. 102, 3, 033709.

    Research output: Contribution to journal › Article › Research › peer review

  19. E-pub ahead of print

    Precision inertial sensing with quantum gases

    Hensel, T., Loriani, S., Schubert, C., Fitzek, F., Abend, S., Ahlers, H., Siemß, J., Hammerer, K., Rasel, E. M. & Gaaloul, N., 8 Sept 2020, (E-pub ahead of print).

    Research output: Working paper/Preprint › Preprint

  20. Published

    Stationary optomechanical entanglement between a mechanical oscillator and its measurement apparatus

    Gut, C., Winkler, K., Hoelscher-Obermaier, J., Hofer, S. G., Nia, R. M., Walk, N., Steffens, A., Eisert, J., Wieczorek, W., Slater, J. A., Aspelmeyer, M. & Hammerer, K., 12 Aug 2020, In: Phys. Rev. Research. 2, 3, 033244.

    Research output: Contribution to journal › Article › Research › peer review

  21. Published

    Dynamics of many-body photon bound states in chiral waveguide QED

    Mahmoodian, S., Calajó, G., Chang, D. E., Hammerer, K. & Sørensen, A. S., 14 Jul 2020, In: Physical Review X. 10, 3, 031011.

    Research output: Contribution to journal › Article › Research › peer review

  22. Published

    Light-mediated strong coupling between a mechanical oscillator and atomic spins 1 meter apart

    Karg, T. M., Gouraud, B., Ngai, C. T., Schmid, G., Hammerer, K. & Treutlein, P., 10 Jul 2020, In: Science. 369, 6500, p. 174-179 6 p.

    Research output: Contribution to journal › Article › Research

  23. E-pub ahead of print

    Technologies for the ELGAR large scale atom interferometer array

    ELGAR, E., 8 Jul 2020, (E-pub ahead of print).

    Research output: Working paper/Preprint › Preprint

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