Research Group Pop
Dr. Ioan Pop
Contact:
KIT
Physikalisches Institut
Wolfgang-Gaede-Str. 1
D-76131 Karlsruhe, Germany
and Institute for Quantum Materials and Technologies (IQMT)
mail ioan.pop∂kit.edu
Education
PhD: 2011 NEEL Institute, CNRS and University of Grenoble, France
Master degree: 2007 Physics, University of Grenoble, France
Diploma degree: 2006 Physics, Babeș-Bolyai University, Cluj-Napoca, Romania
Positions
2011-2015 Postdoctoral researcher, Yale University, USA
2007-2011 NEEL Institute, CNRS, Grenoble, France
2007-2010 Teaching assistant, University of Grenoble, France
We have received the generous support of the Alexander von Humboldt foundation through a Sofja Kovalevskaja Award.
Fields of research
Our research focuses on superconducting quantum circuits.
Josephson junctions have been proven to be reliable building blocks for superconducting quantum memories, high-speed processing units, amplifiers and detectors, operating in the microwave domain. In these types of electrical circuits, which can be manufactured using standard lithography, currents and voltages can exhibit quantum mechanical properties and can be controlled using microwave pulses. This makes them appealing for the study of fundamental quantum phenomena and the implementation of quantum information processing.
We are currently interested in the design and implementation of quantum circuits protected against decoherence.
PostDocs, PhD and Master students wanted.
Collaborators
Selected Publications
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Granular aluminum: A superconducting material for high impedance quantum circuits
L. Grunhaupt, M. Spiecker, D. Gusenkova, N. Maleeva, S. T. Skacel, I. Takmakov, F. Valenti, P. Winkel, H. Rotzinger, A. V. Ustinov, and I. M. Pop
Nature Materials 18, 816 (2019), doi:10.1038/s41563-019-0350-3
Featured in:
physicsworld by Emily Toomey
News and Views by Joel Jan Wang and William D. Oliver (MIT, USA) -
Circuit Quantum Electrodynamics of Granular Aluminum Resonators
N. Maleeva, L. Grünhaupt, T. Klein, F. Levy-Bertrand, O. Dupré, M. Calvo, F. Valenti, P. Winkel, F. Friedrich, W. Wernsdorfer, A. V. Ustinov, H. Rotzinger, A. Monfardini, M. V. Fistul, and I. M. Pop
Nature Comm. 9, 3889 (2018), doi:10.1038/s41467-018-06386-9, pdf download (ca. 1.1 MB) -
Loss Mechanisms and Quasiparticle Dynamics in Superconducting Microwave Resonators Made of Thin-Film Granular Aluminum
L. Grünhaupt, N. Maleeva, S. T. Skacel, G. Catelani, M. Calvo, F. Levy-Bertrand, A. V. Ustinov, H. Rotzinger, A. Monfardini, and I. M. Pop
Phys. Rev. Lett. 121, 117001 (2018), doi:10.1103/PhysRevLett.121.117001, pdf download (ca. 1 MB) -
Coherent suppression of electromagnetic dissipation due to superconducting quasiparticles
I. M. Pop, K. Geerlings, G. Catelani, R. J. Schoelkopf, L. Glazman and M. H. Devoret
Nature, 508, 369 (2014), doi:10.1038/nature13017, pdf download (ca. 3.6 MB) -
Measurement of the effect of quantum phase-slips in a Josephson junction chain
I. M. Pop, I. Protopopov, F. Lecocq, Z. Peng, B. Pannetier, O. Buisson and W. Guichard
Nature Physics, 6, 589-592 (2010), pdf download (ca. 420 kB)
Publications Group Pop
Rieger, D.; Günzler, S.; Spiecker, M.; Paluch, P.; Winkel, P.; Hahn, L.; Hohmann, J. K.; Bacher, A.; Wernsdorfer, W.; Pop, I. M.
2022. Nature Materials, 22 (2), 194–199. doi:10.1038/s41563-022-01417-9
Gusenkova, D.; Valenti, F.; Spiecker, M.; Günzler, S.; Paluch, P.; Rieger, D.; Pioraş-Ţimbolmaş, L.-M.; Zârbo, L. P.; Casali, N.; Colantoni, I.; Cruciani, A.; Pirro, S.; Cardani, L.; Petrescu, A.; Wernsdorfer, W.; Winkel, P.; Pop, I. M.
2022. Applied Physics Letters, 120 (5), Art.-Nr.: 054001. doi:10.1063/5.0075909
Takmakov, I.; Winkel, P.; Foroughi, F.; Planat, L.; Gusenkova, D.; Spiecker, M.; Rieger, D.; Grünhaupt, L.; Ustinov, A. V.; Wernsdorfer, W.; Pop, I. M.; Roch, N.
2021. Physical review applied, 15 (6), Art. Nr.: 064029. doi:10.1103/PhysRevApplied.15.064029
Gusenkova, D.; Spiecker, M.; Gebauer, R.; Willsch, M.; Willsch, D.; Valenti, F.; Karcher, N.; Grünhaupt, L.; Takmakov, I.; Winkel, P.; Rieger, D.; Ustinov, A. V.; Roch, N.; Wernsdorfer, W.; Michielsen, K.; Sander, O.; Pop, I. M.
2021. Physical review applied, 15 (6), Art. Nr.: 064030. doi:10.1103/PhysRevApplied.15.064030
Cardani, L.; Valenti, F.; Casali, N.; Catelani, G.; Charpentier, T.; Clemenza, M.; Colantoni, I.; Cruciani, A.; D’Imperio, G.; Gironi, L.; Grünhaupt, L.; Gusenkova, D.; Henriques, F.; Lagoin, M.; Martinez, M.; Pettinari, G.; Rusconi, C.; Sander, O.; Tomei, C.; Ustinov, A. V.; Weber, M.; Wernsdorfer, W.; Vignati, M.; Pirro, S.; Pop, I. M.
2021. Nature Communications, 12 (1), Art.-Nr.: 2733. doi:10.1038/s41467-021-23032-z
Levy-Bertrand, F.; Benoît, A.; Bourrion, O.; Calvo, M.; Catalano, A.; Goupy, J.; Valenti, F.; Maleeva, N.; Grünhaupt, L.; Pop, I. M.; Monfardini, A.
2021. Physical Review Applied, 15 (4), Art.-Nr.: 044002. doi:10.1103/PhysRevApplied.15.044002
Borisov, K.; Rieger, D.; Winkel, P.; Henriques, F.; Valenti, F.; Ionita, A.; Wessbecher, M.; Spiecker, M.; Gusenkova, D.; Pop, I. M.; Wernsdorfer, W.
2020. Applied physics letters, 117 (12), Art.-Nr.: 120502. doi:10.1063/5.0018012
Andersen, C. K.; Kamal, A.; Masluk, N. A.; Pop, I. M.; Blais, A.; Devoret, M. H.
2020. Physical review applied, 13 (4), Art. Nr.: 044017. doi:10.1103/PhysRevApplied.13.044017
Yang, F.; Gozlinski, T.; Storbeck, T.; Grünhaupt, L.; Pop, I. M.; Wulfhekel, W.
2020. Physical review / B, 102 (10), Art.-Nr. 104502. doi:10.1103/PhysRevB.102.104502
Winkel, P.; Borisov, K.; Grünhaupt, L.; Rieger, D.; Spiecker, M.; Valenti, F.; Ustinov, A. V.; Wernsdorfer, W.; Pop, I. M.
2020. Physical review / X, 10 (3), Art.Nr. 031032. doi:10.1103/PhysRevX.10.031032
Winkel, P.; Takmakov, I.; Rieger, D.; Planat, L.; Hasch-Guichard, W.; Grünhaupt, L.; Maleeva, N.; Foroughi, F.; Henriques, F.; Borisov, K.; Ferrero, J.; Ustinov, A. V.; Wernsdorfer, W.; Roch, N.; Pop, I. M.
2020. Physical review applied, 13 (2), Art. Nr.: 024015. doi:10.1103/PhysRevApplied.13.024015
Cardani, L.; Casali, N.; Catelani, G.; Charpentier, T.; Clemenza, M.; Colantoni, I.; Cruciani, A.; Gironi, L.; Gruenhaupt, L.; Gusenkova, D.; Henriques, F.; Lagoin, M.; Martinez, M.; Pirro, S.; Pop, I. M.; Rusconi, C.; Ustinov, A.; Valenti, F.; Vignati, M.; Wernsdorfer, W.
2020. Journal of low temperature physics, 199, 475–481. doi:10.1007/s10909-019-02265-9
Friedrich, F.; Winkel, P.; Borisov, K.; Seeger, H.; Sürgers, C.; Pop, I. M.; Wernsdorfer, W.
2019. Superconductor science and technology, 32 (12), 125008. doi:10.1088/1361-6668/ab4918
Grünhaupt, L.; Spiecker, M.; Gusenkova, D.; Maleeva, N.; Skacel, S. T.; Takmakov, I.; Valenti, F.; Winkel, P.; Rotzinger, H.; Wernsdorfer, W.; Ustinov, A. V.; Pop, I. M.
2019. Nature materials, 18 (8), 816–819. doi:10.1038/s41563-019-0350-3
Henriques, F.; Valenti, F.; Charpentier, T.; Lagoin, M.; Gouriou, C.; Martínez, M.; Cardani, L.; Vignati, M.; Grünhaupt, L.; Gusenkova, D.; Ferrero, J.; Skacel, S. T.; Wernsdorfer, W.; Ustinov, A. V.; Catelani, G.; Sander, O.; Pop, I. M.
2019. Applied physics letters, 115 (21), Art.-Nr.: 212601. doi:10.1063/1.5124967
Levy-Bertrand, F.; Klein, T.; Grenet, T.; Dupré, O.; Benoît, A.; Bideaud, A.; Bourrion, O.; Calvo, M.; Catalano, A.; Gomez, A.; Goupy, J.; Grünhaupt, L.; Luepke, U. v.; Maleeva, N.; Valenti, F.; Pop, I. M.; Monfardini, A.
2019. Physical review / B, 99 (9), Art. Nr.: 094506. doi:10.1103/PhysRevB.99.094506
Valenti, F.; Henriques, F.; Catelani, G.; Maleeva, N.; Grünhaupt, L.; Von Lüpke, U.; Skacel, S. T.; Winkel, P.; Bilmes, A.; Ustinov, A. V.; Goupy, J.; Calvo, M.; Benoît, A.; Levy-Bertrand, F.; Monfardini, A.; Pop, I. M.
2019. Physical review applied, 11 (5), 054087. doi:10.1103/PhysRevApplied.11.054087
Maleeva, N.; Grünhaupt, L.; Klein, T.; Levy-Bertrand, F.; Dupre, O.; Calvo, M.; Valenti, F.; Winkel, P.; Friedrich, F.; Wernsdorfer, W.; Ustinov, A. V.; Rotzinger, H.; Monfardini, A.; Fistul, M. V.; Pop, I. M.
2018. Nature Communications, 9, Article: 3889. doi:10.1038/s41467-018-06386-9
Rastelli, G.; Pop, I. M.
2018. Physical review / B, 97 (20), Art.-Nr.: 205429. doi:10.1103/PhysRevB.97.205429
Kou, A.; Smith, W. C.; Vool, U.; Pop, I. M.; Sliwa, K. M.; Hatridge, M.; Frunzio, L.; Devoret, M. H.
2018. Physical review applied, 9 (6), Art.-Nr. 064022–1. doi:10.1103/PhysRevApplied.9.064022
Petrescu, A.; Türeci, H. E.; Ustinov, A. V.; Pop, I. M.
2018. Physical review / B, 98 (17), Art.Nr. 174505. doi:10.1103/PhysRevB.98.174505
Grünhaupt, L.; Maleeva, N.; Skacel, S. T.; Calvo, M.; Levy-Bertrand, F.; Ustinov, A. V.; Rotzinger, H.; Monfardini, A.; Catelani, G.; Pop, I. M.
2018. Physical review letters, 121 (11), 117001. doi:10.1103/PhysRevLett.121.117001
Vool, U.; Kou, A.; Smith, W. C.; Frattini, N. E.; Serniak, K.; Reinhold, P.; Pop, I. M.; Shankar, S.; Frunzio, L.; Girvin, S. M.; Devoret, M. H.
2018. Physical review applied, 9 (5), 054046. doi:10.1103/PhysRevApplied.9.054046
Muppalla, P. R.; Gargiulo, O.; Mirzaei, S. I.; Venkatesh, B. P.; Juan, M. L.; Grünhaupt, L.; Pop, I. M.; Kirchmair, G.
2018. Physical review / B, 97 (2), Art.Nr. 024518. doi:10.1103/PhysRevB.97.024518
Richer, S.; Maleeva, N.; Skacel, S. T.; Pop, I. M.; DiVincenzo, D.
2017. Physical review / B, 96 (17), Art.Nr. 174520. doi:10.1103/PhysRevB.96.174520
Grünhaupt, L.; Lüpke, U. von; Gusenkova, D.; Skacel, S. T.; Maleeva, N.; Schlör, S.; Bilmes, A.; Rotzinger, H.; Ustinov, A. V.; Weides, M.; Pop, I. M.
2017. Applied physics letters, 111 (7), Art. Nr. 072601. doi:10.1063/1.4990491
Smith, W. C.; Kou, A.; Vool, U.; Pop, I. M.; Frunzio, L.; Schoelkopf, R. J.; Devoret, M. H.
2016. Physical review / B, 94 (14), 144507. doi:10.1103/PhysRevB.94.144507
Minev, Z. K.; Serniak, K.; Pop, I. M.; Leghtas, Z.; Sliwa, K. M.; Hatridge, M. J.; Frunzio, L.; Schoelkopf, R. J.; Devoret, M. H.
2016. Physical Review Applied, 5 (4), 044021. doi:10.1103/PhysRevApplied.5.044021