Are symmetries perfect  last hope CPT-symmetry
{"Image DocumentName": "Are symmetries perfect? \uf0e8 last hope CPT-symmetry?", "Image ImageDescription": "the CPT-theorem states that under very general conditions, quantum field theories always have to exhibit CPT-symmetry. also experimentally, no violations have been observed so far. \uf0e0 CPT-Symmetry is (as far as we know today) not violated. interesting side remark: as a consequence of CPT-symmetry together with CP-violation, there has to exist a violation of T-symmetry. that means: the fundamental laws of nature are not time-symmetric, there is a special direction of time even at microscopic level. \u201efuture IS different from the past, after all!", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}