Katharina Geistlinger, PhD

Katharina worked in the group of Prof. Dr. Roland Wester on High Resolution Spectroscopy of biomolecules produced in an electrospray ionisation (ESI) source. During her PhD studies she visited the FELIX Laboratory in Nijmegen, NL. She defended her thesis on April 4th 2022.

Current employment: Umweltanwaltschaft Tirol, Österreichische Bundesforste

Selected publications:
Geistlinger K., Dahlmann F., Michaelsen T., Oncák M., Endres E., Wester R. (2021): Multiple helium tagging and OH vibrational spectroscopy of cold protonated glycine ions
in: J. Mol. Spectrosc 379 (2021) DOI
Geistlinger, K, Fischer, M, Spieler, S, Remmers, L, Duensing, F, Dahlmann, F, Endres, E, Wester, R (2021): A sub-4 Kelvin radiofrequency linear multipole wire trap
in: Rev Sci Instrum 92 (2021) DOI


Elvia Colella

Elvia Colella, PhD

Elvia worked in the group of Prof. Dr. Helmut Ritsch and  focused on Quantum many-body dynamics of ultra-cold gases in cavity mediated opical potentials. During her PhD studies she visited the group of Jean-Philippe Brantut at EPFL, CH. Elvia defended her thesis at the University of Innsbruck on March 3rd 2022.

Current employment: tba

Selected publications:
Colella, E.; Mivehvar, F.; Ritsch, H. (2022): Open Quantum-System Simulation of Faraday's Induction Law via Dynamical Instabilities
in: Physical Review Letters 128/7 (2022) DOI

Colella, E.; Mivehvar, F.; Piazza, F.; Ritsch, H. (2019): PThe Hofstadter Butterfly in a Dynamic Cavity-Induced Synthetic Magnetic Field
in: PhysRevB 100 (2019) DOI

Colella, E.; Chiofalo, M.L.; Barsanti, M.; Rossini, D.; Citro, R. (2019): Fluid structure of 1D spinful Fermi gases with long-range interactions.
In: Journal of Physics B: Atomic Molecular And Optical Physics 52/21, No. 215301. (DOI) (Web link)

Jakob Heller, PhD

Jakob worked in the group of Prof. Dr. Martin Beyer and defened his thesis 'Photochemistry and Spectroscopy of Hydrated Metal Ions, M+(H2O)n, M = Al and V' on February 24th 2022. During his PhD studies he visited two times the group of Joost Bakker at Radboud University (FELIX Laboratory), NL and the group of Manfred Kappes at Karlsruhe Institute of Technology, DE.

Current employment: Ionicon

Selected publications:
Heller J, Pascher FF, Muß D, van der Linde C, Beyer MK, Ončák M (2021): Photochemistry and UV/vis spectroscopy of hydrated vanadium cations, V+ (H2O)n, n = 1–41, a model system for photochemical hydrogen evolution
in: PCCP 23 (2021) DOI
Heller J, Tang WK, Cunningham EM, Demissir EG, van der Linde C, Ončák M, Siu CK, Beyer MK (2021): Getting Ready for the Hydrogen Evolution Reaction: The Infrared Spectrum of Hydrated Aluminum Hydride-Hydroxide HAlOH+(H2O)n-1n = 9-14
in: Angew. Chem. / Angew. Chem. Int. Ed. 60 (2021) DOI

Heller J, Ončák M, Bersenkowitsch N, van der Linde C, Beyer M (2019): Infrared multiple photon dissociation of cesium iodide clusters doped with mono-, di- and triglycine
in: Eur J Mass Spec 25 (2019) DOI



Max Sohmen, PhD

Max worked in the group of Prof. Dr. Francesca Ferlaino. Max worked in the RARE team and focused on the development of a new optical-lattice setup for dipolar quantum gases. During his PhD studies he visited the groups of Markus Greiner at Harvard University, US, the group of Immanuel Bloch at MPQ, DE and Jerome Beugnon's group at Laboratoire Kastler Brossel, FR. Max defended his thesis at the University of Innsbruck on January 14th 2022.

Current employment: Medizinische Universität Innsbruck

Selected publications:
Sohmen, M.; Politi, C.; Klaus, L.; Chomaz, L.; Mark, M.J.; Norcia, M.A.; Ferlaino, F. (2021): Birth, Life, and Death of a Dipolar Supersolid
in: Physical Review Letters 126 (2021) DOI
Ilzhöfer, P.*; Sohmen, M.*; Durastante, G.; Politi, C.; Trautmann, A.; Natale, G.; Morpurgo, G.; Giamarchi, T.; Chomaz, L.; Mark, M.J.; Ferlaino, F. (2021): Phase coherence in out-of-equilibrium supersolid states of ultracold dipolar atoms
in: Nature Physics 17 (2021)
DOINorcia, M.A.*; Politi, C.*; Klaus, L.; Poli, E.; Sohmen, M.; Mark, M.J.; Bisset, R.N.; Santos, L.; Ferlaino, F. (2021): Two-dimensional supersolidity in a dipolar quantum gas
in: Nature 596 (2021) DOI

* = contributed equally


Malcolm Simpson, PhD

Malcolm worked in the group of Prof. Dr. Roland Wester were he worked on laser spectroscopy of trapped molecular ions of astrochemical interest. During his PhD studies he visited the groups Wolf Geppert, University of Stockholm, SE, Laurent Hilico, Laboratoire Kastler Brossel, FR and Wolfgang Ernst, Technische Universität Graz, AT. He worked also on the Felix Freeelectron Laser at the University of Nijmegen, NL. Malcolm defended his thesis at the University of Innsbruck on January 14th 2022.

Current employment: Menlo Systems, DE

Selected publications:
Simpson, Malcolm; Nötzold, Markus; Gianturco, Franco A.; Michaelsen, Tim; Wild, Robert; Wester, Roland (2021): Influence of a Supercritical Electric Dipole Moment on the Photodetachment of C3N-.
in: Physical Review Letters 127/4, No. 043001 (2021)DOI
Simpson, M.; Nötzold, M.; Schmidt-May, A.; Michaelsen, T.; Bastian, B.; Meyer, J.; Wild, R.; Gianturco, F.A.; Milovanovic, M.; Kokoouline, V.; Wester, R. (2020): Threshold Photodetachment Spectroscopy of the Astrochemical Anion CN-.
in: The Journal of Chemical Physics 153, No. 184309 (2020) DOI
Lakhmanskaya, O.; Simpson, M.; Wester, R. (2020): Vibrational overtone spectroscopy of cold trapped hydroxyl anions.
in: Physical Review A (Atomic, Molecular and Optical Physics) 102/1, No. 012809 (2020)DOI

Isabella Fritsche, PhD

Isabella worked in the group of Prof. Dr. Rudolf Grimm on the FeLiKx experiment. During her PhD studies she visited the groups of Giacomo Roati at the LENS, Florence, IT and the group of Fabrice Gerbier at the ENS / LKB in Paris, FR. She defended her thesis at the University of Innsbruck on August 2nd 2021.

Current employment: IQOQI
Selected publications:
Fritsche, I.; Baroni, C.; Dobler, E.; Kirilov, E.; Huang, B. (黄博); Grimm, R.; Bruun G.M.; Massignan, P. (2021): Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture
in: Phys. Rev. Lett. A 103, 053314 (2021)  (DOI)
Centina, M.; Jag, M.; Lous, R.S.; Fritsche, I.;   Walraven, J.T.M.; Grimm, R.; Levinsen, J.; Parish, M.M.; Schmidt, R.; Knap, M.; Demler E.  (2016): Ultrafast many-body interferometry of impurities coupled to a Fermi sea
in: Science, Vol 354, Issue 6308 (2016)  (DOI)
Lous, R.S.; Fritsche, I.; Jag, M.; Lehmann, F.; Kirilov, E.; Huang, B. (黄博); Grimm, R. (2018): Probing the Interface of a Phase-Separated State in a Repulsive Bose-Fermi Mixture
in: Phys. Rev. Lett. 120, 243403 (2018)  (DOI)

Christian M. Schneider, PhD

Christian worked in the group of Prof. Dr. Gerhard Kirchmair on Magnetic coupling between Superconducting Circuits and a Cantilever. During his PhD studies he visited the groups of Dieter Kölle and Reinholf Kleiner at the Universität Tübingen, DE and the  group of Konrad Lehnert at the University of Colorado, US. He defended his thesis at the University of Innsbruck on July 16th 2021.

Current employment: Post doc University of Innsbruck
Selected publications:
Zoepfl D.; Juan, M.L.; Schneider C.M.F.; Kirchmair, G. (2020): Single-Photon Cooling in Microwave Magnetomechanics
in: Phys. Rev. Lett. 125, 023601 (2020)  (DOI)

Rosenthal, E.I.; Schneider, C.M.F.; Malnou, M.; Zhao, Z.; Leditzky, F.; Chapman, B.J.;  Wustmann, W.; Ma, X.; Palken, D.A.; Zanner, M.F.; Vale, L.R.; Hilton, G.C.; Gao, J.; Smith, G.; Kirchmair, G.; Lehnert, K.W. (2021): Efficient and Low-Backaction Quantum Measurement Using a Chip-Scale Detector
in: Phys. Rev. Lett. 126, 090503 (2021) (DOI)

Heidler, P.; Schneider, C.M.F.; Kustura, K.; Gonzalez-Ballestero, C.; Romero-Isart, O.; Kirchmair, G. (2021): Observing Non-Markovian Effects of Two-Level Systems in a Niobium Coaxial Resonator with a Single-Photon Lifetime of 10 ms
in: will be published PR Applied  (DOI)



Nina Bersenkowitsch, PhD

Nina worked in the group of Prof. Dr. Martin Beyer on Photochemistry of salt clusters doped with atmospherically relevant species. During her PhD studies she visited 2 times the group of Ruth Signorell, ETH Zurich, CH, Mark Johnson's group at the University of Yale, US, and Vickie Grassian's group at the University of San Diego, US. She obtained her PhD at the University on November 30th 2020.

Current employment: Donauspital Wien, AT
Selected publications:

Bersenkowitsch, N.; Oncak, M.; van der Linde, C.; Herburger, A.; Beyer, M.K. (2018): Photochemistry of glyoxylate embedded in sodium chloride clusters, a laboratory model for tropospheric sea-salt aerosols
in: Phys. Chem. Chem. Phys., 2018, 20, 8143-8151 (DOI)

Bersenkowitsch, N.; Oncak, M.; Heller, J.; van der Linde, C.; Beyer, M.K. (2018): Photodissociation of Sodium Iodide Clusters Doped with Small Hydrocarbons
in: Chem. Eur. J. 2018, 12433-12443 (DOI)

Bersenkowitsch, N.; Oncak, M.; Heller, J.; Pascher, T.F.; van der Linde, C.; Beyer, M.K. (2020): Evidence for lactone formation during infrared multiple photon dissociation spectroscopy of bromoalkanoate doped salt clusters
in: Chys. Chem. Chem. Phys. 020, 22, 12028-12038 (DOI)



Gianmaria Durastante, PhD

Gianmaria worked in the group of Prof.a Dr. Francesca Ferlaino on the RARE (Rydberg Atoms with Rare Earths) experiment on Creation of Erbium-Dysprosium Dipolar Quantum Mixtures and their
Interspecies Feshbach Resonances. During his PhD studies he visited the group of Florian Schreck at University of Amsterdam, NL, and the group of Manuel Endres, Caltech, California Institute of Technology, US. He received his PhD in Innsbruck on November 30th 2020. 

Current employment: Besi Netherlands B.V., NL

Selected publications
Chomaz, L.; Petter, D.; Ilzhöfer, P.; Natale, G.; Trautmann, A.; Politi, C.; Durastante, G.;  van Bijnen, R.M.W.; Patscheider, A.; Sohmen, M.; Mark, M.J.; Ferlaino, F. (2019): Long-lived and transient supersolid behaviors in dipolar quantum gases
In: Phys.Rev X, 021012, 2019 (DOI)

Trautmann, A.; Ilzhöfer, P.; Durastante, G.; Politi, C.; Sohmen, M.; Mark, M.J., Ferlaino, F. (2018): Dipolar quantum mixtures of Erbium and Dysprosium atoms
In: Phys.Rev.Lett. 121, 213601, 2018 (DOI)


Michael Rader, PhD

Michael worked in the group of Prof. Andreas Läuchli, where he studied and worked on Tensor network state methods and applications for strongly correlated quantum many-body systems. During his PhD studies, he visited the group of Frank Verstraete and Jutho Haegeman at University of Ghent, BE and the group of Frank Pollmann at Technical University of Munich, DE for research. He received his PhD in Innsbruck on Septemer 25th 2020.

Current employment: Fraunhofer Austria, AT


Selected publications

Rader, M.; Läuchli, A. M. (2019): Floating Phases in One-Dimensional Rydberg Ising Chains

Rader, M.; Hebenstreit, M.; Zillich, R. E. (2017): The multi-component correlated basis function method and its application to multilayered dipolar Bose gases.
In: Physical Review A (Atomic, Molecular and Optical Physics) 95/3, No. 033625. (DOI) (Web link)



Lorenz Ballauf, PhD

Lorenz worked in the group of Prof. Paul Scheier, where he studied and worked on ion-surface interactions on a single particle level. During his PhD studies, he visited the J.H. Institute for Physical Chemistry, CZ, the Forschungszentrum Jülich, DE and the University of Hawaii,US for research. These collaborations lead to various publications. He received his PhD in Innsbruck on July 31st 2020.

Current employment: Mattro GmbH, AT


Selected publications

Ballauf, L.; Hechenberger, F.; Bohme, D.K.; Scheier, P. (2020): Ablation of tungsten surfaces in collisions with Ar+, He+ and N2+ cation projectiles in the presence of D2.
In: International Journal of Mass Spectrometry 448, No. 116252. (DOI) (Web link)

Fárník, Michal; Pysanenko, Andriy; Moriová, Kamila; Ballauf, Lorenz; Scheier, Paul; Chalabala, Jan; Slavícek, Petr (2018): Ionization of Ammonia Nanoices With Adsorbed Methanol Molecules.
In: The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory 122/43, pp. 8458 - 8468. (DOI) (Web link)



Hendrik Poulsen-Nautrup, PhD

Hendrik worked in the group of Prof. Hans Briegel on machine learning methodologies for quantum information. During his PhD studies, he visited the University of British Columbia, CA, Microsoft Station Q, US, State University of New York at Stony Brook, US, and the ETH Zürich, CH. He received his PhD in Innsbruck on July 7th 2020.

Current employment: Postdoc, University of Innsbruck


Selected publications

Flamini, Fulvio; Hamann, Arne; Jerbi, S.; Trenkwalder, Lea; Poulsen Nautrup, H.; Briegel, Hans J. (2020): Photonic architecture for reinforcement learning.
In: New Journal of Physics 22, No. 045002. (DOI) (Web link)

Poulsen Nautrup, H.; Delfosse, N.; Dunjko, V.; Briegel, Hans J.; Friis, N. (2019): Optimizing Quantum Error Correction Codes with Reinforcement Learning.
In: Quantum 3, No. 2015. (DOI) (Web link)


Martin Hebenstreit, PhD

Martin worked in the group of Prof.a Barbara Kraus, where he studied multipartite entanglement. He worked on entanglement classification as well as on matchgate computations. During his PhD studies, he joined the University of Technology Sydney, the Benasque Science Center, the University of Cambridge and the University Carlos III de Madrid for research. These collaborations lead to publications e.g. with Richard Jozsa, University of Cambridge. He received his PhD in Innsbruck on April 20th 2020.

Current employment: FAS GmbH, DE



Selected publications

Hebenstreit, M.; Jozsa, R.; Kraus, B.; Strelchuk, S.; Yoganathan, M.: All Pure Fermionic Non-Gaussian States Are Magic States for Matchgate Computations, Physical Review Letters 123/8, No. 080503 (2019)

Słowik, O.; Hebenstreit, M.;  Kraus, B.; Sawicki, A.: A link between symmetries of critical states and the structure of SLOCC classes in multpartite systems, arXiv:1912.00099 [quant-ph] (2019)



Lorenz Kranabetter, PhD

Lorenz worked on the helium nanodroplet experiment and explored the unique properties of these systems in cluster growth mechanisms, ion molecule reactions, and spectroscopy in the group of Prof. Paul Scheier. During his PhD studies, he visited the University of Southern California, Vitaly Kresin, Los Angeles, US. This collaboration was  relevant publications with Vitaly Kresin. He received his PhD in Innsbruck on January 21st 2020.

Current employment: Postdoc, University of Aarhus, NL

Selected publications

J. W. Niman, B. S. Kamerin, D. J. Merthe, L. Kranabetter, V. V. Kresin, Oriented Polar Molecules Trapped in Cold Helium Nanodropets: Electrostatic Deflection, Size Separation, and Charge Migration, Phys. Rev. Lett. 123, 165301

L. Kranabetter, N. K. Bersenkowitsch, P. Martini, M. Gatchell, M. Kuhn, F. Laimer, A. Schiller, M. K. Beyer, M. Oncak, P. Scheier, Considerable matrix shift in the electronic transitions of helium-solvated cesium dimer cation Cs2He+n, Phys.Chem.Chem.Phys, 2019, 21, 25362-25368   


Davide Orsucci, PhD

Davide worked on quantum algorithms in the theory group of Prof. Hans J. Briegel. For example, he published two quantum algorithms to solve systems of linear equations. During his PhD studies, he visited the Center for Quantum Information and Control in Albuquerque and the Singapore University of Technology and Design. He received his PhD in Innsbruck on October 30th 2019 and worked as  a postdoc at University of Basel, CH, in the Quantum Optics theory group, Sangourad group in 2019.

current employment: German Aerospace Center (DLR), DE



Selected publications

Y. Subaşı, R.D. Somma, D. Orsucci, Quantum Algorithms for Systems of Linear Equations Inspired by Adiabatic Quantum Computing, Physical Review Letters 122, 060504 (2019)

 D. Orsucci, H.J. Briegel, V. Dunjko, Faster quantum mixing for slowly evolving sequences of Markov chains, Quantum 2, 105 (2018)



David Plankensteiner, PhD

David worked on on quantum optics and cavity QED in the group of Prof. Helmut Ritsch. He worked in the field of quantum optics with dipole-dipole interaction of quantum emitters. During his PhD studies, he visited JILA Institute - University of Colorado, Boulder, US, Max Planck Insitute for Science and Light, DE and ICFO - The Barcelona Institute of Science and Technology, ES. He received his PhD in Innsbruck on July 8th 2019.

Current employment: Sales Manager, Txture, AT

Selected publications

D. Plankensteiner, C. Sommer, H. Ritsch, C. Genes, C., Cavity Antiresonance Spectroscopy of Dipole Coupled Subradiant Arrays. Physical Review Letters 119/9, No. 093601 (2017)

S. Krämer, D. Plankensteiner, L. Ostermann, H. Ritsch, QuantumOptics.jl: A Julia framework for simulating open quantum systems, Computer Physics Communications 227, pp. 109 - 116 (2018)


David Sauerwein

David Sauerwein, PhD

David worked on entanglement in quantum many-body systems in the group of Prof.a Barbara Kraus. He quantified and investigated new transformations of multipartite entanglement. During his PhD studies, he visited Gilad Gour at University of Calgary in Canada and he worked with the research group of Ignacio Cirac at MPQ Garching in Germany. He received his PhD in Innsbruck on Feb.19th 2019.

Current employment: Data Scientist, aws, CH


Selected publications

C. Spee, J.I. de Vecente, D. Sauerwein, B. Kraus: Entangled Pure State Transformations via Local Operations Assisted by Finitely Many Rounds of Classical Communication. Phys. Rev. Lett. 118, 040503 (2017)

 D. Sauerwein, N.R. Wallach, G. Gour, B. Kraus: Transformations among Pure Multipartite Entangled States via Local Operations are Almost Never Possible. Phys. Rev. X 8, 031020 (2018)








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