PT5 - Testing gravitation theories in space |
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Speaker |
Terno, Daniel |
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Coauthors |
Schiavon, Matteo; Smith, Alexander R. H.; Terno, Daniel R.; Vallone, G; Vedovato, F; Villoresi, P |
| Talk Title |
Quantum crypto satellites and tests of relativity |
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Abstract |
Satellite missions for secure quantum communications are now becoming reality. They also provide opportunities for new tests of fundamental physics. Several possible experiments related to the QEYSSAT mission will be described. Ability to perform sensitive optical interferometry is one of the key performance requirements of such missions. This ability makes possible a new class of tests of the Einstein Equivalence Principle (EEP). The key element of EEP is the local position invariance (LPI), and one of its aspects is demonstrated by measuring the gravitational red shift. Violation of the LPI is characterized by the parameter α that in all metric theories equals to 1. Current test are effectively focused on the matter sector, assuming that electromagnetic signals travels in the usual way. We propose an interferometric test that deals exclusively with light. The main obstacle to its implementation is the first-order Doppler Effect that dominates the parameters of interest. Our design allows to eliminate this problem and potentially opens a way for all-optical tests that will put tighter bounds on α-1. |
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