HU+DESY Lattice Seminars
This seminar series is organised jointly by the NIC Research Group at DESY Zeuthen and the Theory of Elementary Particles and Computational Theoretical Physics research groups of the Institute for Physics at Humboldt University. For questions please contact Dr. Lorenzo Barca (DESY Zeuthen).
Some seminars will be held in person and some on zoom, generally on Mondays at 13:15. Due to the participation of international speakers some seminars may start at 15:00. Please check the individual dates. The Zoom connection details will be announced via the lat-bb mailing list. In-person seminars will be in the IRIS building in Adlershof (zum Großen Windkanal 2), but the room may change.
iCal link: https://indico.desy.de/export/categ/873.ics?from=-31d
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Lorenzo Barca, Investigating a two-level algorithm for fermionic observables
Date: Monday, January 26, 2026
Time: 1:15 pm (Europe/Berlin)
Location: HU ZGW 1.021
Links:
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We investigate the combination of a two-level sampling algorithm with distillation techniques to compute disconnected fermionic correlation functions. The method relies on a factorization of the quark propagator into domain-local contributions that depend only on the gauge fields within overlapping temporal regions, enabling independent submeasurements of each term through a two-level sampling strategy.
The statistical uncertainty follows the expected inverse scaling with the number of second-level submeasurements, up to exponential boundary effects, in contrast to the inverse square-root scaling of standard sampling. This leads to an exponential reduction of statistical errors at negligible additional computational cost compared to the gain in statistical precision.
The method is tested on pure gauge ensembles, providing a controlled benchmark for its forthcoming application to dynamical QCD studies.
Andres Strump, TBA
Date: Monday, February 9, 2026
Time: 1:15 pm (Europe/Berlin)
Location: HU ZGW 1.021
Links:
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TBA
Claudio Buonnano, TBA
Date: Monday, April 13, 2026
Time: 1:15 pm (Europe/Berlin)
Location: HU ZGW 1.021
Links:
Indico
iCal
TBA