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cond-mat.str-el2022★ 1 cited
Conformal anomaly in magnetic finite temperature response of strongly interacting one-dimensional spin systems
Christian Northe, Chunxu Zhang, Rafał Wawrzyńczak +3
The conformal anomaly indicates the breaking of conformal symmetry (angle-preserving transformations) in the quantum theory by quantum fluctuations and is a close cousin of the gra…
physics.ins-det2022★ 2 cited
Application of FPGA based Lock-in amplifier for ultrasound propagation measurements using the pulse-echo technique
Stanislaw Galeski, Rafał Wawrzyńczak, Claudius Riek +1
We describe application of a state-of-the art digital FPGA based Lock-In amplifier to measurements of ultrasound propagation and attenuation at fixed frequency in low temperatures…