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cond-mat.other2025
Operator dependence and robustness of spacetime-localized response in a quantum critical spin chain
Daichi Imagawa, Keiju Murata, Daisuke Yamamoto
We investigate the phenomenon of spacetime-localized response in a quantum critical spin system, with particular attention to how it depends on the spatial profile and operator con…
hep-th2025
Spin systems as quantum field theories in inflationary universe: A study with Unruh-DeWitt detectors
Shunichiro Kinoshita, Keiju Murata, Daisuke Yamamoto +1
We propose a method to probe the thermal properties of quantum field theory (QFT) in an inflationary universe simulated by spin systems. Our previous work (arXiv:2410.07587) has de…