Dr. Ralf Aurich

photo of team member

The focus of my current research is on the cosmic microwave background (CMB) radiation. The fluctuations of the CMB reveal tiny energy density perturbations which act as the seeds for the structure formation leading to the galaxies and galaxy clusters of the present Universe. According to the inflationary scenario these fluctuations arise from quantum fluctuations which freeze in due to the exponential increase of the scale factor which describes the expansion. The correlations of the initial quantum fluctuations are engraved in the correlations of the CMB on the celestial sphere.

My recent work deals with the two-point correlation function of the CMB and its unexpected low power at large angular scales. This could point to a spatial finite universe which possesses naturally such a behaviour since the quantum fluctuations have to fulfill the periodic boundary conditions of the considered space form. The lowest eigenstate of the Laplacian corresponds to the largest scale at which perturbations can imprint a signature on the CMB sky.

Recent publications:

Ralf Aurich on ResearchGate

Most Recent Papers

Efficient Information Retrieval for Sensing via Continuous MeasurementPhys. Rev. X 13, 031012arXiv:2209.08777

Active hyperpolarization of the nuclear spin lattice: Application to hexagonal boron nitride color centers, Phys. Rev. B 107, 214307, arXiv:2010.03334

Driving force and nonequilibrium vibronic dynamics in charge separation of strongly bound electron–hole pairsCommun Phys 6, 65 (2023)arXiv:2205.06623

Asymptotic State Transformations of Continuous Variable ResourcesCommun. Math. Phys. 398, 291–351 (2023)arXiv:2010.00044

Spin-Dependent Momentum Conservation of Electron-Phonon Scattering in Chirality-Induced Spin SelectivityJ. Phys. Chem. Lett. 2023, 14, XXX, 340–346arXiv:2209.05323


Ulm University
Institute of Theoretical Physics
Albert-Einstein-Allee 11
D - 89069 Ulm

Tel: +49 731 50 22911
Fax: +49 731 50 22924

Office: Building M26, room 4117

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