Johannes Majer

No.99 Xiupu Road, Pudong District, Shanghai, China

Research Interests:My research is focused on hybrid quantum systems. In particular my interest is aimed at coupling superconducting quantum circuits to spins systems such as nitrogen-vacancy defects in diamond. This solid-state quantum optics platform allows us to study fundamental quantum effects such a as superradiance and bistability. Furthermore, this coupled system allows us to realize quantum technologies, such as microwave photon detectors and frequency transducers.


  • Astner, T., Gugler, J., Angerer, A., Wald, S., Putz, S., Mauser, N., Trupke, M., Sumiya, H., Onoda, S., Isoya, J., Schmiedmayer, J., Mohn, P. & Majer, J. Solid-state electron spin lifetime limited by phononic vacuum modes. Nature Materials 17, (2018).
  • Angerer, A., Streltsov, K., Astner, T., Putz, S., Sumiya, H., Onoda, S., Isoya, J., Munro, W., Nemoto, K., Schmiedmayer, J. & Majer, J. Superradiant emission from colour centres in diamond. Nature Physics 14, (2018).
  • Putz, S., Angerer, A., Krimer, D., Glattauer, R., Munro, W., Rotter, S., Schmiedmayer, J. & Majer, J. Spectral hole burning and its application in microwave photonics. Nature Photonics 11, 36-39 (2017).
  • Angerer, A., Putz, S., Krimer, D., Astner, T., Zens, M., Glattauer, R., Streltsov, K., Munro, W., Nemoto, K., Rotter, S., Schmiedmayer, J. & Majer, J. Ultralong relaxation times in bistable hybrid quantum systems. Science Advances 3, 1-7 (2017).
  • Astner, T., Nevlacsil, S., Peterschofsky, N., Angerer, A., Rotter, S., Putz, S., Schmiedmayer, J. & Majer, J. Coherent Coupling of Remote Spin Ensembles via a Cavity Bus. Physical Review Letters 118, (2016).
  • Nöbauer, T., Angerer, A., Bartels, B., Trupke, M., Rotter, S., Schmiedmayer, J., Mintert, F. & Majer, J. Smooth Optimal Quantum Control for Robust Solid-State Spin Magnetometry. Phys. Rev. Lett. 115, 190801 (2015).
  • Putz, S., Krimer, D., Amsüss, R., Valookaran, A., Nöbauer, T., Schmiedmayer, J., Rotter, S. & Majer, J. Protecting a Spin Ensemble against Decoherence in the Strong-Coupling Regime of Cavity QED. Nature Physics (2014).
  • Amsüss, R., Koller, C., Nöbauer, T., Putz, S., Rotter, S., Sandner, K., Schneider, S., Schramböck, M., Steinhauser, G., Ritsch, H., Schmiedmayer, J. & Majer, J. Cavity QED with Magnetically Coupled Collective Spin States. Physical Review Letters 107, 060502 (2011).
  • Majer, J., Chow, J., Gambetta, J., Koch, J., Johnson, B., Schreier, J., Frunzio, L., Schuster, D., Houck, A., Wallraff, A., Blais, A., Devoret, M., Girvin, S. & Schoelkopf, R. Coupling superconducting qubits via a cavity bus. Nature 449, 443-447 (2007).
  • Wallraff, A., Schuster, D., Blais, A., Frunzio, L., Huang, R. -S., Majer, J., Kumar, S., Girvin, S. & Schoelkopf, R. Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics. Nature 431, 0-5 (2004).