About: Experimental basis of Special Relativity/Recent Tests of CPT and Lorentz Invariance   Sponge Permalink

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The CPT theorem is a general property of quantum field theories that states (loosely) that any system must behave the same if one applies the CPT transform to it: invert all charges (C, charge conjugation), invert all spatial axes (P, parity inversion), and invert the direction of time (T, time inversion). While one cannot actually do any of that in the real world, one can perform experiments in which particles are replaced by antiparticles (C), one looks at situations in which left and right are interchanged (P), and the particles travel along similar paths but in opposite directions and have opposite spin polarizations (T).

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  • Experimental basis of Special Relativity/Recent Tests of CPT and Lorentz Invariance
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  • The CPT theorem is a general property of quantum field theories that states (loosely) that any system must behave the same if one applies the CPT transform to it: invert all charges (C, charge conjugation), invert all spatial axes (P, parity inversion), and invert the direction of time (T, time inversion). While one cannot actually do any of that in the real world, one can perform experiments in which particles are replaced by antiparticles (C), one looks at situations in which left and right are interchanged (P), and the particles travel along similar paths but in opposite directions and have opposite spin polarizations (T).
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  • The CPT theorem is a general property of quantum field theories that states (loosely) that any system must behave the same if one applies the CPT transform to it: invert all charges (C, charge conjugation), invert all spatial axes (P, parity inversion), and invert the direction of time (T, time inversion). While one cannot actually do any of that in the real world, one can perform experiments in which particles are replaced by antiparticles (C), one looks at situations in which left and right are interchanged (P), and the particles travel along similar paths but in opposite directions and have opposite spin polarizations (T). Lorentz Invariance is the technical term for the statement that SR is valid. Any violation of CPT invariance implies a violation of Lorentz invariance; theories without Lorentz invariance need not have CPT invariance. * Kosteleckэ and Mewes, “Signals for Lorentz violation in electrodynamics”, Phys. Rev. D66, 056005 (2002).: A review of various limits, terrestrial and astrophysical. * Mueller, “Testing Lorentz invariance by the use of vacuum and matter filled cavity resonators”, Phys. Rev. D71, 045004 (2005).: A review article.
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