Jahresübersicht für das Jahr 2022
keine vergangenen Seminare
Seminar about Experimental Particle and Astroparticle Physics (ETAP)
Institut für Physik 12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum |
| Francesco Lombardi, Institut für Physik | |
tba | |
| at Zoom also available | |
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Physikalisches Kolloquium
Institut für Kernphysik, Hybrid Seminar 16 Uhr c.t., Hörsaal CO2 Chemie - Nord-Ost (2321) Duesbergweg 10 - 14 |
| Dr. Dionysis Antipas, University of Mainz | |
Parity violation in atoms | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:00 Uhr s.t., None |
| Prof. Stefan Willitsch, Universität Basel | |
The development of quantum technologies for molecules has remained a long-standing challenge due to the complexity of molecular systems. We have recently developed a quantum-non-demolition technique for the non-destructive detection of the internal quantum state of a single trapped molecular ion [1,2,3]. The method is based on the state-dependent coherent excitation of the motion of the molecular ion and subsequent measurement of the motional quantum state using a co-trapped atomic ion. This approach offers new perspectives not only for the detection, but also for the preparation and the manipulation of molecular quantum states on the single-particle level with a sensitivity several orders of magnitude higher compared to previously used destructive schemes. We present a characterisation of the technique using the homonuclear diatomic ion N2+ as an example and show how it can be used for non-invasive spectroscopic measurements on single molecules. We also discuss applications of this technique in the realm of precision molecular spectroscopy [4] using a newly established fibre network for the precise transfer of frequencies within Switzerland and their comparison to the Swiss primary standard at METAS.
References: [1] Z. Meir, G. Hegi, K. Najafian, M. Sinhal and S. Willitsch, "State-selective coherent motional excitation as a new approach for the manipulation, spectroscopy and state-to-state chemistry of single molecular ions”, Faraday Discuss. 217 (2019), 561. [2] M. Sinhal, Z. Meir, K. Najafian, G. Hegi and S. Willitsch, "Quantum non-demolition state detection and spectroscopy of single trapped molecules”, Science 367 (2020), 1213. [3] K. Najafian, Z. Meir, M. Sinhal and S. Willitsch, "Identification of molecular quantum states using phase-sensitive forces”, Nat. Commun. 11 (2020), 4470. [4] K. Najafian, Z. Meir and S. Willitsch, ”From megahertz to terahertz qubits encoded in molecular ions: theoretical analysis of dipole-forbidden spectroscopic transitions in N2+”, Phys. Chem. Chem. Phys. 22 (2020), 23083. [5] D. Husmann et al., “SI-traceable frequency dissemination at 1572.06 nm in a stabilized fiber network with ring topology”, Opt. Expr. 29 (2021), 24592. | |
| at Zoom | |
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Seminar about Experimental Particle and Astroparticle Physics (ETAP)
Institut für Physik 12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum |
| Daniel Wenz, Institut für Physik | |
tba | |
| at Zoom also available | |
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Physikalisches Kolloquium
Institut für Kernphysik, Hybrid Seminar 16:15 Uhr s.t., Hörsaal CO2, Chemie - Nord-Ost (2321) Duesbergweg 10 - 14 |
| Hans-Jürgen Butt, MPI für Polymerforschung | |
Wetting on adaptive surfaces | |
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PRISMA Colloquium
Institut für Physik 13:00 Uhr s.t., None |
| Liu Hanjie, University of Massachusetts | |
PREX-II: Precision parity-violating measurements of the neutron skin of lead | |
| at Zoom | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:00 Uhr s.t., None |
| Prof. James Thompson, JILA; University of Colorado, Dept. of Physics, Boulder/USA | |
I will discuss a range of cavity QED experiments that explore how to exploit atom-light interactions to create atom-atom correlations and entanglement for quantum sensing and quantum simulation. Using rubidium atoms, we have implemented both cavity-enhanced quantum nondemolition measurements and cavity-mediated spin-spin interactions to realize an entangled light-pulse matterwave interferometer that is directly observed to operate below the standard quantum limit [1]. Using strontium atoms, we have achieved pulsed superradiant lasing on the millihertz clock transition [2,3], developed a new method for determining the intrinsic radiative lifetime of the clock state [4], and observed a dynamical phase transition [5] arising from a competition between cavity-mediated spin exchange interactions [6] and single particle dynamics. If time permits, I will briefly describe our progress toward a continuous superradiant laser.
[1] Greve & Luo et al, arXiv:2110.14027 (2021)
[2] Norcia et al, Science Adv. 2 e1601231 (2016)
[3] Norcia et al, Phys. Rev. X 8 021036 (2018)
[4] Muniz et al, Phys. Rev. Res. 3 023152 (2021)
[5] Muniz et al, Nature 580 602 (2020)
[6] Norcia et al, Science 361 259 (2018) | |
| at Zoom | |
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Seminar über Theorie der kondensierten Materie / TRR146 Seminar
K. Binder/ A. Nikoubashman / F. Schmid / G. Settanni / T. Speck / M. Sulpizi / P. Virnau 10:30 Uhr s.t., None |
| Joshua Robinson, Department of Physics, Uni Mainz | |
TBA | |
| at Zoom | |
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SFB/TR49/SFB TRR 173 Spin+X-Kolloquium/TopDyn - Seminar experimentelle Physik der kondensierten Materie
SFB/TR49 - Prof. Dr. Elmers 16:00 Uhr s.t., der Raum wird separat angekündigt |
| Jayasimah Atulasimha, tba | |
tba | |
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Seminar about Experimental Particle and Astroparticle Physics (ETAP)
Institut für Physik 12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum |
| Alfons Weber, Institut für Physik | |
tba | |
| at Zoom also available | |
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Theorie-Palaver
Institut für Physik 14:00 Uhr s.t., Lorentz room (Staudingerweg 7, 5th floor) |
| Anne Mareike Galda, JGU Mainz | |
TBA | |
| at Zoom | |
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Physikalisches Kolloquium
Institut für Kernphysik, Hybrid Seminar 16 Uhr c.t., Chemie - Nord-Ost (2321) Duesbergweg 10 - 14 |
| Marek Kowalski, HU Berlin/DESY | |
Multi-messanger Astronomy (TDEs) | |
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GRK 2516 Soft Matter Seminar
Uni Mainz 13:15 Uhr s.t., None |
| Christian Holm, University Stuttgart | |
TBA | |
| at Zoom | |
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PRISMA Colloquium
Institut für Physik 13:00 Uhr s.t., None |
| Francesca Carlin, Coach, Berlin | |
Special event!
Picture a Scientist: Do you fit the image? Defining and Redefining the Role
Online talk and discussion about how gender and implicit biases affect scientific careers
with Francesca Carlin, Coach | |
| at Zoom | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:00 Uhr s.t., None |
| Prof. Ania Bleszynski Jayich, University of California, Physics Dept., Santa Barbara/USA | |
Solid state spin qubits, in particular the nitrogen vacancy (NV) center in diamond, offer a path towards truly nanoscale imaging of condensed matter and biological systems with sensitivity to single nuclear spins. Here I discuss our NV-based magnetic imaging experiments as applied to condensed matter systems, where we have imaged current flow patterns in graphene as well as skyrmions, nanoscale spin textures. A grand challenge to improving the spatial resolution and magnetic sensitivity of the NV is mitigating surface-induced quantum decoherence, which I will discuss in the second part of this talk. Decoherence at interfaces is a universal problem that affects many quantum technologies, but the microscopic origins are as yet unclear. Our studies guide the ongoing development of quantum control and materials control, pushing towards the ultimate goal of NV-based single nuclear spin imaging. | |
| at Zoom | |
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GRK 2516 Soft Matter Seminar
Uni Mainz 10:15 Uhr s.t., None |
| M. Schweitzer; P. Ritzert, JGU, Chemistry; TU Darmstadt | |
Synthetic hydrogels have sparked high interest in recent years as matrix materials for biotechnological applications. In supramolecular hydrogels the three-dimensional gel network is formed by non-covalent interactions between small molecules. These can be influenced and selectively switched on and off by external stimuli. Telechelic polymer-peptide conjugates using the basic amino acid histidine in a hydrophobic phenylalanine (F)-histidine (H) pentapeptide sequence FHFHF have previously been reported to promote pH-switchable self-assembly into one-dimensional nanorods by β-sheet formation. When encoding for assembly into parallel β-sheets these structures have also shown interstrand cross-linking, leading to the formation of hydrogels. Furthermore, ROS-responsiveness can be achieved by altering the peptide sequence to incorporate methionine. The use of polymer-peptide conjugates combines the advantages of synthetic polymers like the easy scalability with the defined amino acid sequence and the resulting high structural definition of peptides.
In this work we report the synthesis of telechelic poly(ethylene glycol)-peptide conjugates and their ability to form multistimuli-responsive hydrogels. The terminal peptide blocks contain the hydrophobic pentapeptide sequence FHFHF to promote pH-switchable β-sheet formation and self-assembly into nanorods as well as interstrand cross-linking for hydrogelation. The conjugates were characterized by NMR and GPC and the pH-switchable self-assembly and formation of nanorods was confirmed via CD-spectroscopy and transmission electron microscopy. Rheological measurements of hydrogels at physiologically relevant conditions showed responsiveness to pH-value and temperature. | |
| at Zoom | |
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Seminar about Experimental Particle and Astroparticle Physics (ETAP)
Institut für Physik 12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum |
| Alexander Basan, Institut für Physik | |
Top-antitop energy asymmetry in jet-associated top-quark pair production at ATLAS | |
| at Zoom also available | |
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Physikalisches Kolloquium
Institut für Kernphysik, Hybrid Seminar 16 Uhr c.t., Hörsaal CO2 Chemie - Nord-Ost (2321) Duesbergweg 10 - 14 |
| Mikhail Eremets, MPIC Mainz | |
Superconductivity | |
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PRISMA Colloquium
Institut für Physik 13:00 Uhr s.t., None |
| Maarten Boonekamp, Saclay / HIM | |
Electroweak precision measurements at LHC | |
| at Zoom | |
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Seminar über Theorie der kondensierten Materie / TRR146 Seminar
K. Binder/ A. Nikoubashman / F. Schmid / G. Settanni / T. Speck / M. Sulpizi / P. Virnau 15:30 Uhr s.t., None |
| Ann-Katrin Fattal and Christopher Schierholz, Continental | |
IRTG Industry talk | |
| at Zoom | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:00 Uhr s.t., None |
| Dr. Sandra Eibenberger-Arias, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin | |
TBA | |
| at Zoom | |
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Seminar about Experimental Particle and Astroparticle Physics (ETAP)
Institut für Physik 12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum |
| Sebastian Ritter, Institut für Physik | |
DUNE ND-GAr ECAL Concepts | |
| at Zoom also available | |
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Physikalisches Kolloquium
Institut für Kernphysik, Hybrid Seminar 16 Uhr c.t., via Zoom |
| Julie Grollier, CNRS/Thales Lab | |
Neuronale Netze / Festkörper | |
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PRISMA Colloquium
Institut für Physik 13:00 Uhr s.t., None |
| Meytal Duer, TU Darmstadt | |
Experimental studies of short-range correlations | |
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Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)
Institut für Physik 14:00 Uhr s.t., None |
| Prof. Ronald Fernando Garcia Ruiz, Massachusetts Institute of Technology (MIT), Cambridge, MA/USA | |
Molecules containing heavy and octupole deformed radioactive nuclei are predicted to provide enhanced sensitivity to investigate distinct nuclear phenomena, to test the violation of fundamental symmetries, and to search for new physics beyond the Standard Model of particle physics. However, experimental measurements of such radioactive systems are scarce, and their study requires to overcome major experimental challenges. This seminar will discuss recent spectroscopy measurements of short-lived radium fluoride molecules (RaF) alongside future perspectives in the study of these and other radioactive molecules. | |
| at Zoom | |
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GRK 2516 Soft Matter Seminar
Uni Mainz 10:15 Uhr s.t., None |
| O. Stach; Y. Manish Wani, JGU, Chemistry; JGU, Physics | |
TBA | |
| at Zoom | |
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SFB/TR49/SFB TRR 173 Spin+X-Kolloquium/TopDyn - Seminar experimentelle Physik der kondensierten Materie
SFB/TR49 - Prof. Dr. Elmers 16:00 Uhr s.t., der Raum wird separat angekündigt |
| Mario Carpentieri, tba | |
tba | |
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Seminar about Experimental Particle and Astroparticle Physics (ETAP)
Institut für Physik 12:30 Uhr s.t., Staudingerweg 7, Minkowskiraum |
| Olivera Vujinovic, Institut für Physik | |
tba | |
| at Zoom also available | |
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