GRK 2079:  Cold Controlled Ensembles in Physics and Chemistry

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2015 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 255962793

• Final Report Year: 2021

Final Report Abstract

The International Research Training Group (IRTG 2079) "Cold Controlled Ensembles in Physics and Chemistry" was both scientifically and in terms of doctoral training a great success, and has significantly enriched the activities within the contributing research groups at the University of Freiburg and at UBC in Vancouver. The key aspect of an improvement in the education and the graduation of doctoral researchers is clearly evidenced in the comparison of IRTG CoCo graduates with their fellow students locally in Freiburg, but outside the IRTG Coco, or even nationwide: the IRTG CoCo researchers graduated earlier and with better grades. Furthermore, we were able to bring an above-average portion of female researchers to graduation. On a qualitative level, the success of the IRTG CoCo is evidenced by the following features: (1) The underlying science: the established collaborations and the continuous scientific exchange and discussions included in the IRTG qualification program have, first and foremost, led to high-level und internationally recognized research projects which could only be established in the combination of the involved groups at UF and UBC. This is also shown by the output of publications and the large number of contributions to conferences and workshops. (2) The interdisciplinary mix of projects between physics and chemistry was just right for the doctoral researchers. We managed very successfully to invoke in each IRTG participant a feeling of passion and competence for their own project and interest in that of their peers. In this way, everyone was exposed to physics and chemistry beyond the own specific area of research. Moreover, the opportunities within the IRTG fertilizing ideas by bringing in many external guests as well as presenting work and discussing projects at conferences and workshops, provides precious added value to own research and qualification. (3) The international and intercultural spirit was deeply entrained into the doctoral work, not only directly during exchange visits, but also to a large extend during the continuous interactions and discussions as a result of IRTG events. Thus, numerous further projects and joint publications were established beyond the duration of the IRTG. (4) The IRTG formed a community of friends beyond national borders, which very much deepens the cultural exchange, but also allows participants to better calibrate their own achievements. In simpler words, the participants know and help each other. (5) The IRTGs in Freiburg and in particular the IRTG CoCo have influenced the graduation regulations of the Faculty of Mathematics and Physics of the University of Freiburg by their successful quality management structures. Co-supervision, supervision agreements etc. that are now part of the graduation regulations were to a large extend triggered and discussed with IRTG coordinators. It is important to stress that the IRTG doctoral researchers were very satisfied with the IRTG program and its opportunities, as demonstrated by the evaluation surveys. The networking possibilities as well as the qualification and study program were well accepted. Since 2016, the IRTG has developed numerous highly qualified scientists working on research projects at universities, in industry and at world-renowned research institutions. Unfortunately, the time of the extension period was dominated by the worldwide pandemic situation and has hampered travel and exchange activities with UBC in this final stage. However, in comparison with the great achievements of the whole program this is only a very minor downstroke.

Publications

• Electromagnetic Green's function for layered topological insulators. Phys. Rev. A 92, 063831 (2015)
  J. A. Crosse, S. Fuchs, and S.Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.92.063831)
• A simple photoionization scheme for characterizing electron and ion spectrometers. Rev. Sci. Instrum. 87, 083105 (2016)
  A. Wituschek, J. v. Vangerow, J. Grzesiak, F. Stienkemeier, and M. Mudrich
  (See online at https://doi.org/10.1063/1.4960401)
• Casimir-Lifshitz force for nonreciprocal media and applications to photonic topological insulators. Phys. Rev. A 96, 062505 (2017)
  S. Fuchs, F. Lindel, R. V. Krems, G. W. Hanson, M. Antezza, and S. Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.96.062505)
• Casimir-Lifshitz force for nonreciprocal media and ppplications to photonic topological insulators. Phys. Rev. A 96, 062505 (2017)
  S. Fuchs, F. Lindel, R. V. Krems, G. W. Hanson, M. Antezza, and S. Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.96.062505)
• Casimir-Polder shift and decay rate in the presence of nonreciprocal media. Phys. Rev. A 95, 023805 (2017)
  S. Fuchs, J. A. Crosse, and S. Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.95.023805)
• Long lifetimes and effective isolation of ions in optical and electrostatic traps. Nat. Photonics 11, 704 (2017)
  A. Lambrecht, J. Schmidt, P. Weckesser, M. Debatin, L. Karpa, and T. Schaetz
  (See online at https://doi.org/10.1038/s41566-017-0030-2)
• Many-particle interference in a two-component bosonic Josephson junction: an all-optical simulation. New J. Phys. 19, 125015 (2017)
  G. Dufour, T. Brünner, C. Dittel, G. Weihs, R. Keil, and A. Buchleitner
  (See online at https://doi.org/10.1088/1367-2630/aa8cf7)
• Singlet fission in weakly interacting acene molecules. J. Phys. Chem. Lett. 8 (9), 2068 (2017)
  S. Izadnia, D. Schönleber, A. Eisfeld, A. Ruf, A. LaForge, and F. Stienkemeier
  (See online at https://doi.org/10.1021/acs.jpclett.7b00319)
• Spectroscopic signatures of triplet states in acenes. J. Phys. B 50, 154007 (2017)
  O. Stauffert, R. Ghassemizadeh, and M. Walter
  (See online at https://doi.org/10.1088/1361-6455/aa7d2c)
• An optogalvanic gas sensor for nitric oxide based on Rydberg excitations. Appl. Phys. Lett. 113, 011113 (2018)
  J. Schmidt, M. Fiedler, R. Albrecht, D. Djekic, P. Schalberger, H. Baur, R. Löw, N. Fruehauf, T. Pfau, J. Anders, E. R. Grant, and H. Kübler
  (See online at https://doi.org/10.1063/1.5024321)
• An optogalvanic gas sensor for nitric oxide based on Rydberg excitations. Appl. Phys. Lett. 113, 011113 (2018)
  J. Schmidt, M. Fiedler, R. Albrecht, D. Djekic, P. Schalberger, H. Baur, R. Löw, N. Fruehauf, T. Pfau, J. Anders, E. R. Grant, and H. Kübler
  (See online at https://doi.org/10.1063/1.5024321)
• Casimir-Polder potential of a driven atom. Phys. Rev. A 98 (2), 022514 (2018)
  S. Fuchs, R. Bennett, and S.Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.98.022514)
• Control of dispersion interactions of atoms near surfaces, FreiDok plus, 2018
  S. Fuchs
  (See online at https://doi.org/10.6094/UNIFR/17115)
• Delocalized excitons and interaction effects in extremely dilute thermal ensembles. Phys. Chem. Chem. Phys 21, 2276 (2018)
  L. Bruder, A. Eisfeld, U. Bangert, M. Binz, M. Jakob, D. Uhl, M. Schulz-Weiling, E. R. Grant, and F. Stienkemeier
  (See online at https://doi.org/10.1039/c8cp05851b)
• Electronic-state-controlled Penning ionization of magneto-opticallytrapped lithium atoms, FreiDok plus, 2018
  J. Grzesiak
  (See online at https://doi.org/10.6094/UNIFR/149373)
• Inducing and controlling rotation on small objects using photonic topological materials. Phys. Rev. A 98 (14), 144101 (2018)
  F. Lindel, G. W. Hanson, M. Antezza, and S.Y. Buhmann
  (See online at https://doi.org/10.1103/physrevb.98.144101)
• Nonadditivity of optical and Casimir–Polder potentials. Phys. Rev. Lett. 121 (8), 083603 (2018)
  S. Fuchs, R. Bennett, R. V. Krems, and S. Y. Buhmann
  (See online at https://doi.org/10.1103/physrevlett.121.083603)
• Nonadditivity of optical and Casimir–Polder potentials. Phys. Rev. Lett. 121 (8), 083603 (2018)
  S. Fuchs, R. Bennett, R. V. Krems, and S. Y. Buhmann
  (See online at https://doi.org/10.1103/physrevlett.121.083603)
• Nonaddivity of optical and Casimir-Polder potentials. Phys. Rev. Lett. 121, 083603 (2018)
  S. Fuchs, F. Lindel, R. V. Krems, W. Hanson, M. Antezza, and S. Y. Buhmann
  (See online at https://doi.org/10.1103/physrevlett.121.083603)
• Optical trapping of ion Coulomb crystals. FreiDok plus, 2018
  J. Schmidt
  (See online at https://doi.org/10.6094/UNIFR/16352)
• Optical trapping of ion Coulomb crystals. Phys. Rev. X 8, 021028 (2018)
  J. Schmidt, A. Lambrecht, P. Weckesser, M. Debatin, L. Karpa, and T.Schaetz
  (See online at https://doi.org/10.1103/physrevx.8.021028)
• Phase noise reduction of mutually tunable lasers 2 with an external acousto-optic modulator. JOASAB 36 (1), (2018)
  G. Polovy, J. Schmidt, D. Uhland, E. Frieling, K. Dare, and K. W. Madison
  (See online at https://doi.org/10.1364/josab.36.000464)
• Production of rotationally cold methyl radicals in pulsed supersonic beams. Rev. Sci. Instrum. 89, 113103 (2018)
  J. Grzesiak, M. Vashishta, P. Djuricanin, F. Stienkemeier, M. Mudrich, K. Dulitz, and T. Momose
  (See online at https://doi.org/10.1063/1.5052017)
• Production of rotationally cold methyl radicals in pulsed supersonic beams. Rev. Sci. Instrum. 89, 113103, (2018)
  J. Grzesiak, M. Vashishta, P. Djuricanin, F. Stienkemeier, M. Mudrich, K. Dulitz, and T. Momose
  (See online at https://doi.org/10.1063/1.5052017)
• Purcell-Dicke enhancement of the Casimir-Polder potential. Europhys. Lett. 124, 34003 (2018)
  S. Fuchs and S. Buhmann
  (See online at https://doi.org/10.1209/0295-5075/124/34003)
• Quantum dynamics of Rb atoms desorbing off the surface of He nanodroplets. Phys. Rev. A. 98 (4), 043403 (2018)
  N. V. Dozmorov, A. V. Baklanov, J. von Vangerow, F. Stienkemeier, J. A. M. Fordyce, and M. Mudrich
  (See online at https://doi.org/10.1103/physreva.98.043403)
• Signatures of indistinguishability in bosonic many-body dynamics. Phys. Rev. Lett. 120, 210401 (2018)
  T. Brünner, G. Dufour, A. Rodriguez, and A. Buchleitner
  (See online at https://doi.org/10.1103/physrevlett.120.210401)
• Signatures of partial distinguishability in the dynamics of interacting bosons, FreiDok plus, 2018
  T. Brünner
  (See online at https://doi.org/10.6094/UNIFR/16683)
• The influence of retardation and dielectric environments on Interatomic Coulombic Decay. Nat. Commun. 9, 2934 (2018)
  J. L. Hemmerich, R. Bennett, and S. Y. Buhmann
  (See online at https://doi.org/10.1038/s41467-018-05091-x)
• A Stern-Gerlach separator of chiral enantiomers based on the Casimir-Polder potential. Phys. Rev. A 99, 012513 (2019)
  F. Suzuki, T. Momose, and S.Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.99.012513)
• Ab initio study on molecular charge transport and conformational analysis of organic molecules, FreiDok plus, 2019
  Ghassemizadeh, Reyhaneh
  (See online at https://doi.org/10.6094/UNIFR/149622)
• Electron-phonon coupling with density functional, FreidDok plus, 2019
  O. Stauffert
  (See online at https://doi.org/10.6094/UNIFR/150036)
• Optical signature of pentacene in soft rare-gas evironements, J. Chem. Phys. 150 (24), 244703 (2019)
  O. Stauffert, S. Izadnia, F. Stienkemeier, M. Walter
  (See online at https://doi.org/10.1063/1.5097553)
• Penning collisions between supersonically expanded metastable helium atoms and laser-cooled lithium atoms. J. Chem. Phys. 150, 034201 (2019)
  J. Grzesiak, T. Momose, F. Stienkemeier, M. Mudrich, and K. Dulitz
  (See online at https://doi.org/10.1063/1.5063709)
• Penning collisions between supersonically expanded metastable helium atoms and laser-cooled lithium atoms. J. Chem. Phys. 150, 034201 (2019)
  J. Grzesiak, T. Momose, F. Stienkemeier, M. Mudrich, and K. Dulitz
  (See online at https://doi.org/10.1063/1.5063709)
• Phase noise reduction of mutually tunable lasers with an external acousto-optic modulator, JOSAB 36, 464-469 (2019)
  G. Polovy, J. Schmidt, D. Uhland, E. Frieling, K. Dare, and K. W. Madison
  (See online at https://doi.org/10.1364/josab.36.000464)
• Phase noise reduction of mutually tunable lasers with an external acousto-optic modulator, JOSAB 36, 464-469 (2019)
  G. Polovy, J. Schmidt, D. Uhland, E. Frieling, K. Dare, and K. W. Madison
  (See online at https://doi.org/10.1364/josab.36.000464)
• Real-Time Dynamics of the Formation of Hydrated Electrons upon Irradiation of Water Clusters with Extreme Ultraviolet Light, Phys. Rev. Lett. 122 (13): 133001-1-133001-5 (2019)
  A. C. LaForge, R. Michiels, M. Bohlen, C. Callegari, A. Clark, A. von Conta, M. Coreno, M. Di Fraia, M. Drabbels, M. Huppert, P. Finetti, J. Ma, M. Mudrich, V. Oliver, O. Plekan, K.C. Prince, M. Shcherbinin, S. Stranges, V. Svoboda, H.J. Wörner, F. Stienkemeier
  (See online at https://doi.org/10.1103/physrevlett.122.133001)
• Characterization and Optimization of Ultrashort Pulses for Phasemodulated Spectroscopy, University of Freiburg; FreiDokplus (2020)
  L.S. Klein
  
• Collinear setup for delay in two.color attosecond measurements, J. Phys. Photonics 2, 024006 (2020)
  H. Ahmadi, S. Kellerer, D.P. Ertel, M. Moioli, M. Reduzzi, P.K. Marojou, A.L. Jäger, R.N. Shah, J. Lutz, F. Frassetto, L. Poletto, F. Bragheri, R. Osellame, C.D. Schröter, R. Moshammer, G. Sansone
  (See online at https://doi.org/10.1088/2515-7647/ab823f)
• Massselective removal of ions from Paul traps using parametric excitation, J. Appl. Phys. B volume 126, Article number: 176 (2020)
  J. Schmidt, D. Hönig, P. Weckesser, F. Thielemann, T. Schaetz, and L. Karpa
  (See online at https://doi.org/10.1007/s00340-020-07491-8)
• Optical Traps for sympathetic Cooling of Ions with ultracold neutral Atoms, Phys. Rev. Lett. 124, 053402 (2020)
  J. Schmidt, D. Hönig, P. Weckesser, F. Thielemann, T. Schaetz, and L. Karpa
  (See online at https://doi.org/10.1103/physrevlett.124.053402)
• pH Tuning of Water-Soluble Arylazopyrazole Photoswitches, Chem. Eur. J. 26, 13203-13212 (2020)
  S. Ludwanowski, M. Ari, K. Parison, S. Kalthoum, P. Straub, N. Pompe, S. Weber, M. Walter, A. Walther
  (See online at https://doi.org/10.1002/chem.202000659)
• Quantum-state-dependent chemistry of ultracold Li2 dimers, Phys. Rev. A 102, 013310 (2020)
  G. Polovy, E. Frieling, D. Uhland , J. Schmidt, K. W. Madison
  (See online at https://doi.org/10.1103/physreva.102.013310)
• Quantum-state-dependent chemistry of ultracold Li2 dimers, Phys. Rev. A 102, 013310 (2020)
  G. Polovy, E. Frieling, D. Uhland , J. Schmidt, K. W. Madison
  (See online at https://doi.org/10.1103/physreva.102.013310)
• Single-source, collinear mergedbeam experiment for the study of reactive neutral-neutral collisions, J. Phys. Chem. A 124, 3484 (2020)
  K. Dulitz, M. van den Beld Serrano, F. Stienkemeier
  (See online at https://doi.org/10.1021/acs.jpca.0c00608)
• Suppression of Penning ionization by orbital angular momentum conservation, Phys. Rev. A 102, 022818 (2020)
  K. Dulitz, T. Sixt, J. Guan, J. Grzesiak, M. Debatin, F. Stienkemeier
  (See online at https://doi.org/10.1103/physreva.102.022818)
• Time-resolved formation of excited atomic and molecular states in XUV-induced nanoplasmas in ammonia clusters, Phys. Chem. Chem. Phys. 22: 7828-7834 (2020)
  R. Michiels, A.C. LaForge, M. Bohlen, C. Callegari, A. Clark, A. von Conta, M. Coreno, M. Di Fraia, M. Drabbels, P. Finetti, M. Huppert, V. Oliver, O. Plekan, K.C. Prince, S. Stranges, V. Svoboda, H.J. Wörner, F. Stienkemeier
  (See online at https://doi.org/10.1039/d0cp00669f)
• Time-resolved quantum beats in the fluorescence of helium resonantly excited by XUV radiation, J. Phys. B: At. Mol. Opt. Phys. 53 (24), 244012- (6pp) (2020)
  A.C. LaForge, A. Benediktovitch, V. Sukharnikov, Š. Krušič, M. Žitnik, M. Debatin, R.W. Falcone, J.D. Asmussen, M. Mudrich, R. Michiels, F. Stienkemeier, L. Badano, C. Callegari, M. Di Fraia, M. Ferianis, L. Giannesi, O. Plekan, K.C. Prince, C. Spezzani, N. Rohringer, N. Berrah
  (See online at https://doi.org/10.1088/1361-6455/abc660)
• Analysis of two-color photoelectron spectroscopy for attosecond metrology at seeded free-electron lasers, New J. Phys. 23, 043046 (2021)
  P.K. Marojou, M. Moioli, D.P. Ertel, H. Ahmadi, A.N. Grum-Grzhimailo, G. Sansone
  (See online at https://doi.org/10.1088/1367-2630/abef29)
• Auger decay in dispersing and absorbing environments, Phys. Rev. A 104, 013103 (2021)
  J. Franz, R. Benett, S.Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.104.013103)
• Complex attosecond waveform synthesis at FEL FERMI, Appl. Sci. 11, 9791 (2021)
  P.K. Marojou, M. Moioli, D.P. Ertel, H. Ahmadi, G. Sansone
  (See online at https://doi.org/10.3390/app11219791)
• Development and characterization of high-repetition-rate sources for supersonic beams of fluorine radicals, Rev. Sci. Instrum. 92, 10, 103203 (2021)
  P. Straňák, L. Ploenes, S. Hofsäss, K. Dulitz, F. Stienkemeier, S. Willitsch
  (See online at https://doi.org/10.1063/5.0065498)
• Dynamics of photoexcited Cs atoms attached to helium nanodroplets, J. Phys. Chem. A 125, 41, 9048-9059 (2021)
  N. Rendler, A. Scognamiglio, M. Barranco, M. Pí, N. Halberstadt, K. Dulitz, and F. Stienkemeier
  (See online at https://doi.org/10.1021/acs.jpca.1c05467)
• Evolution and ion kinetics of a XUV-induced nanoplasma in ammonia clusters, J. Phys. B: At. Mol. Opt. Phys. 54 (2); 024002-(8pp), (2021)
  R. Michiels, A.C. LaForge, M.Bohlen, C. Callegari, A. Clark, A. von Conta, M. Corena, Di Fraia M, Drabbels M, P. Finetti, M. Huppert, V. Oliver, O. Plekan, K.C. Prince, S. Stranges, H.J. Wörner, F. Stienkemeier
  (See online at https://doi.org/10.1088/1361-6455/abcf80)
• Localization dynamics in a centrally coupled system, Phys. Rev. B 103, 134201 (2021)
  N. Ng, S. Wenderoth, R.R. Seelam, E. Rabani, H.D. Meyer, M. Thoss, and M. Kolodrubetz
  (See online at https://doi.org/10.1103/physrevb.103.134201)
• Non-Markovian effects in the spin-boson model at zero temperature, Phys. Rev. A 104, 012213 (2021)
  S. Wenderoth, H.P. Breuer, and M. Thoss
  (See online at https://doi.org/10.1103/physreva.104.012213)
• Preparation of individual magnetic sub-levels of 4He(23S1) in a supersonic beam using laser optical pumping and magnetic hexapole focusing, Rev. Sci. Instrum. 92, 7, 073203 (2021)
  T. Sixt, J. Guan, A. Tsoukala, S. Hofsäss, T. Muthu-Arachchige, F. Stienkemeier, K. Dulitz
  (See online at https://doi.org/10.1063/5.0048323)
• Single-shot electron imaging of dopant-induced nanoplasmas, New J. Phys. 23 (5): 053011 (2021)
  C. Medina, D. Schomas, N. Rendler, M. Debatin, D. Uhl, A. Ngai, L. Ben Ltaief, M. Dumergue, Z. Filus, B. Farkas, R. Flender, L. Haizer, B. Kiss, M. Kurucz, B. Major, S. Toth, F. Stienkemeier, R. Moshammer, T. Pfeifer, S.R. Krishnan, A. Heidenreich, M. Mudrich
  (See online at https://doi.org/10.1088/1367-2630/abf7f9)
• Superradiance from nonideal states: A quantum trajectory approach, Phys. Rev. A 103, 043712 (2021)
  S. Fuchs, A. Vukics, S.Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.103.043712)
• Theory of polaritonic quantum-vacuum detection, Phys. Rev. A 102, 041701 (2021)
  F. Lindel, R. Benett, S.Y. Buhmann
  (See online at https://doi.org/10.1103/physreva.102.041701)
• Time-resolved photoelectron imaging of complex resonances in molecular nitrogen, J. Chem. Phys. 154, 144305 (2021)
  M. Fushitani, P.K. Marjou, M. Moioli, D.P. Ertel, R.N. Shah, G. Sansone, K.C. Prince
  (See online at https://doi.org/10.1063/5.0046577)
• Trapping, shaping, and isolating of an ion Coulomb crystal via state-selective optical potentials, Phys. Rev. A 103, 013112 (2021)
  P. Weckesser, F. Thielemann, D. Hoenig, A. Lambrecht, L. Karpa, and T. Schaetz
  (See online at https://doi.org/10.1103/physreva.103.013112)
• Unusual binary aggregates of perylene bisimide revealed by their electronic transitions in helium nanodroplets and DFT calculations, Phys. Chem. Chem. Phys. 23, 13862- 13872 (2021)
  S. Izadnia, F. Stienkemeier, J.R. Cheeseman, J. Bloino, J. Cheramy, W. Jaeger, Y. Xu
  (See online at https://doi.org/10.1039/d1cp01923f)