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The Confrontation between General Relativity and Experiment
 Living Rev. Relativity 9
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Modern tests of Lorentz invariance
 Living Rev. Rel
"... Motivated by ideas about quantum gravity, a tremendous amount of effort over the past decade has gone into testing Lorentz invariance in various regimes. This review summarizes both the theoretical frameworks for tests of Lorentz invariance and experimental advances that have made such high precisio ..."
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Motivated by ideas about quantum gravity, a tremendous amount of effort over the past decade has gone into testing Lorentz invariance in various regimes. This review summarizes both the theoretical frameworks for tests of Lorentz invariance and experimental advances that have made such high precision tests possible. The current constraints on Lorentz violating effects from both terrestrial experiments and astrophysical observations are presented.
Kasnerlike behaviour for subcritical Einsteinmatter systems
, 2002
"... Confirming previous heuristic analyses à la BelinskiiKhalatnikovLifshitz, it is rigorously proven that certain “subcritical” Einsteinmatter systems exhibit a monotone, generalized Kasner behaviour in the vicinity of a spacelike singularity. The D−dimensional coupled Einsteindilatonpform system ..."
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Cited by 28 (9 self)
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Confirming previous heuristic analyses à la BelinskiiKhalatnikovLifshitz, it is rigorously proven that certain “subcritical” Einsteinmatter systems exhibit a monotone, generalized Kasner behaviour in the vicinity of a spacelike singularity. The D−dimensional coupled Einsteindilatonpform system is subcritical if the dilaton couplings of the pforms belong to some dimension dependent open neighbourhood of zero [1], while pure gravity is subcritical if D ≥ 11 [13]. Our proof relies, like the recent theorem [15] dealing with the (always subcritical [14]) Einsteindilaton system, on the use of Fuchsian techniques, which enable one to construct local, analytic solutions to the full set of equations of motion. The solutions constructed are “general” in the sense that they depend on the maximal expected number of free functions.
Living Reviews in Relativity
, 2006
"... The status of experimental tests of general relativity and of theoretical frameworks for analysing them are reviewed. Einstein’s equivalence principle (EEP) is well supported by experiments such as the Eötvös experiment, tests of special relativity, and the gravitational redshift experiment. Fut ..."
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The status of experimental tests of general relativity and of theoretical frameworks for analysing them are reviewed. Einstein’s equivalence principle (EEP) is well supported by experiments such as the Eötvös experiment, tests of special relativity, and the gravitational redshift experiment. Future tests of EEP and of the inverse square law will search for new interactions arising from unification or quantum gravity. Tests of general relativity at the postNewtonian level have reached high precision, including the light deflection, the Shapiro time delay, the perihelion advance of Mercury, and the Nordtvedt effect in lunar motion. Gravitational wave damping has been detected in an amount that agrees with general relativity to half a percent using the HulseTaylor binary pulsar, and new binary pulsar systems may yield further improvements. When direct observation of gravitational radiation from astrophysical sources begins, new tests of general relativity will be possible. c©2001 MaxPlanckGesellschaft and the authors. Further information on copyright is given at
Binary systems as testbeds of gravity theories
, 2007
"... We review the general relativistic theory of the motion, and of the timing, of binary systems containing compact objects (neutron stars or black holes). Then we indicate the various ways one can use binary pulsar data to test the strongfield and/or radiative aspects of General Relativity, and of ge ..."
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Cited by 11 (0 self)
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We review the general relativistic theory of the motion, and of the timing, of binary systems containing compact objects (neutron stars or black holes). Then we indicate the various ways one can use binary pulsar data to test the strongfield and/or radiative aspects of General Relativity, and of general classes of alternative theories of relativistic gravity.
Analogue quantum gravity phenomenology from a twocomponent Bose–Einstein condensate
, 2005
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Cosmology of a Scalar Field Coupled to Matter and an IsotropyViolating Maxwell Field
 JHEP
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Science, Technology and Mission Design for the Laser Astrometric Test Of Relativity
, 2006
"... The Laser Astrometric Test Of Relativity (LATOR) is a MichelsonMorleytype experiment designed to test the metric nature of gravitation – a fundamental postulate of Einstein’s general theory of relativity. The key element of LATOR is a geometric redundancy provided by the longbaseline optical inte ..."
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Cited by 8 (1 self)
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The Laser Astrometric Test Of Relativity (LATOR) is a MichelsonMorleytype experiment designed to test the metric nature of gravitation – a fundamental postulate of Einstein’s general theory of relativity. The key element of LATOR is a geometric redundancy provided by the longbaseline optical interferometry and interplanetary laser ranging. By using a combination of independent timeseries of gravitational deflection of light in the immediate proximity to the Sun, along with measurements of the Shapiro time delay on interplanetary scales (to a precision respectively better than 0.1 picoradians and 1 cm), LATOR will significantly improve our knowledge of relativistic gravity and cosmology. The primary mission objective is i) to measure the key postNewtonian Eddington parameter γ with accuracy of a part in 10 9. 1 2 (1 − γ) is a direct measure for presence of a new interaction in gravitational theory, and, in its search, LATOR goes a factor 30,000 beyond the present best result, Cassini’s 2003 test. Other mission objectives include: ii) first measurement of gravity’s nonlinear effects on light to ∼0.01 % accuracy; including both the traditional Eddington
Cold atom Clocks and Applications
, 2005
"... This paper describes advances in microwave frequency standards using lasercooled atoms at BNMSYRTE. First, recent improvements of the 133 Cs and 87 Rb atomic fountains are described. Thanks to the routine use of a cryogenic sapphire oscillator as an ultrastable local frequency reference, a founta ..."
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This paper describes advances in microwave frequency standards using lasercooled atoms at BNMSYRTE. First, recent improvements of the 133 Cs and 87 Rb atomic fountains are described. Thanks to the routine use of a cryogenic sapphire oscillator as an ultrastable local frequency reference, a fountain frequency instability of 1.6 × 10 −14 τ −1/2 where τ is the measurement time in seconds is measured. The second advance is a powerful method to control the frequency shift due to cold collisions. These two advances lead to a frequency stability of 2 × 10 −16 at 50 000 s for the first time for primary standards. In addition, these clocks realize the SI second with an accuracy of 7 × 10 −16, one order of magnitude below that of uncooled devices. In a second part, we describe tests of possible variations of fundamental constants using 87 Rb and 133 Cs fountains. Finally we give an update on the cold atom space clock PHARAO developed in collaboration with CNES. This clock is one of the main instruments of the ACES/ESA mission which is scheduled to fly on board the International Space Station in 2008, enabling a new generation of relativity tests. 1 1 Introduction: Einstein’s