Corrigendum: STE-QUEST—test of the universality of free fall using cold atom interferometry (2014
                    <i>Class. Quantum Grav</i>
                    . 31 115010)

Aguilera, Deborah N.; Ahlers, Holger; Battelier, Baptiste; Bawamia, Ahmad; Bertoldi, Andréa; Bondarescu, Ruxandra; Bongs, Kai; Bouyer, Philippe; Braxmaier, Claus; Cacciapuoti, L.; Chaloner, Chris; Chwalla, M.; Ertmer, W.; Franz, Matthias; Gaaloul, Naceur; Gehler, Martin; Gerardi, Domenico; Gesa, L.; Gürlebeck, Norman; Hartwig, Jonas T.; Hauth, Matthias; Hellmig, Ortwin; Herr, Waldemar; Herrmann, Sven; Heske, A.; Hinton, Andrew; Ireland, P. J.; Jetzer, Philippe; Johann, Ulrich; Krutzik, Markus; Kubelka, A.; Lämmerzahl, Cláus; Lloro, I.; Massonnet, D.; Mateos, I.; Milke, Alexander; Nofrarias, M.; Oswald, Markus; Peters, A.; Posso-Trujillo, Katerine; Rasel, Ernst M.; Rocco, Emanuele; Roura, Albert; Rudolph, Jan; Schleich, Wolfgang P.; Schubert, C.; Schuldt, Thilo; Seidel, Stephan; Sengstock, K.; Sopuerta, Carlos F.; Sorrentino, F.; Summers, D.; Tino, G. M.; Trenkel, C.; Uzunoglu, N.K.; Klitzing, Wolf von; Walser, Reinhold; Wendrich, Thijs; Wenzlawski, André; Weßels, P.; Wicht, Andreas; Wille, Eric; Williams, Michael; Windpassinger, Patrick

doi:10.1088/0264-9381/31/15/159502

Cited by 45 publications

(82 citation statements)

References 60 publications

(64 reference statements)

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“…By considering ∆a = 10 −14 m.s −2 , T = 1 s, τ = 100 µs, δΩ/Ω = 10 −2 we obtain ∆v < 2 × 10 −8 m.s −1 . This condition is experimentally challenging but remains below the conditions on the differential velocity targeted by STE-QUEST to counteract effects as the gravity gradient or the Coriolis acceleration [36].…”

Section: Discussionmentioning

confidence: 99%

“…On ground, this allows to release some technological constraints on the isolating vibration systems for instance. In micro-gravity environments, according to terms 8 and 9, the use of 87 Rb and 85 Rb allows to work with white noise levels, in the interferometer bandwidth, up to 2 × 10 −4 m.s −2 / √ Hz by considering a relative difference of 10 −9 on wave vectors and 10 −3 on Rabi frequencies, or even up to 1 × 10 −3 m.s −2 / √ Hz if a 10 −4 level on the Rabi frequency match can be achieved (the values of k, T , τ has been here chosen according to STE-QUEST parameters [34][35][36]). This is a strong argument for the use of these two isotopes for testing the WEP in the international space station (ISS) or in a satellite.…”

Section: Discussionmentioning

confidence: 99%

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Characterization of a simultaneous dual-species atom interferometer for a quantum test of the weak equivalence principle

2015

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We present here the performance of a simultaneous dual-species matter-wave accelerometer for measuring the differential acceleration between two different atomic species ( 87 Rb and 85 Rb). We study the expression and the extraction of the differential phase from the interferometer output. The differential accelerometer reaches a short-term sensitivity of 1.23 × 10 −7 g/ √ Hz limited by the detection noise and a resolution of 2 × 10 −9 g after 11000 s, the highest reported thus far with a dual-species atom interferometer to our knowledge. Thanks to the simultaneous measurement, such resolution levels can still be achieved even with vibration levels up to 3 × 10 −3 g, corresponding to a common-mode vibration noise rejection ratio of 94 dB (rejection factor of 50 000). These results prove the ability of such atom sensors for realizing a quantum based test of the weak equivalence principle (WEP) at a level of η ∼ 10 −9 even with high vibration levels and a compact sensor.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Characterization of a simultaneous dual-species atom interferometer for a quantum test of the weak equivalence principle

2015

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“…Examples are Lisa Pathfinder for testing MOND theories, 57,58 or STE-QUEST for doing tests of the Einstein Equivalence Principle with a set of clocks and with atom interferometry. 59,60 In the field of astronomy and astrophysics many new projects for hugely improving the accuracy of astronomical measurements are under development. Examples are the Square Kilometre Array SKA, the Event Horizon Telescope EHT, GRAV-ITY, the Extreme Large Telescope ELT, and others.…”

Section: Discussionmentioning

confidence: 99%

Session Summary: Experimental Gravitation

Lämmerzahl

2015

The Thirteenth Marcel Grossmann Meeting

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A scheme based on a constructive axiomatic approach for General Relativity is presented which can be taken as guideline to experimentally test and confirm General Relativity. We start with the properties of light propagation and the properties of the motion of neutral pointlike test particles. For that also the structure of the equations of motion are discussed. The requirements that particles are not allowed to move faster than light and that the ticking rates of clocks behave universal in gravitational field then give the Riemannian structure of space-time. The next step is to establish the Einstein field equations for which no constructive scheme exists. Therefore deviations from these field equations are considered. The central task is to find a scheme which does not allow any loophole in the experimental foundation of General Relativity and, thus, provide a complete test of SR and GR. The presentation of the Experimental Gravitation session are included in the presented scheme.

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“…The measured phases for both isotopes are subtracted to reveal any possible differences in acceleration under free fall conditions of the particles. This way, the common mode noise which is present on both signals is rejected to a high degree [24,25]. In the proposed instrument [24,25] a number of the order of 10 6 atoms of both isotopes are trapped and cooled by means of sophisticated magnetic traps in combination with laser cooling.…”

Section: Payloadmentioning

confidence: 99%

“…This way, the common mode noise which is present on both signals is rejected to a high degree [24,25]. In the proposed instrument [24,25] a number of the order of 10 6 atoms of both isotopes are trapped and cooled by means of sophisticated magnetic traps in combination with laser cooling. Thus, the residual temperature and consequently the residual motion and expansion of the atomic clouds is reduced to the nK regime, where the cloud of individual atoms makes the transition to the Bose-Einstein condensed state.…”

Section: Payloadmentioning

confidence: 99%

STE-QUEST mission and system design

Hechenblaikner¹,

Hess²,

Vitelli³

et al. 2014

Exp Astron

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STE-QUEST is a fundamental science mission which is considered for launch within the Cosmic Vision programme of the European Space Agency (ESA). Its main scientific objectives relate to probing various aspects of Einstein's theory of general relativity by measuring the gravitational red-shift of the earth, the moon and the sun as well as testing the weak equivalence principle to unprecedented accuracy. In order to perform the measurements, the system features a spacecraft equipped with two complex instruments, an atomic clock and an atom interferometer, a ground-segment encompassing several ground-terminals collocated with the best available ground atomic clocks, and clock comparison between space and ground via microwave and optical links. The baseline orbit is highly eccentric and exhibits strong variations of incident solar flux, which poses challenges for thermal and power subsystems in addition to the difficulties encountered by precise-orbit-determination at high altitudes. The mission assessment and definition phase (Phase-A) has recently been completed and this paper gives a concise overview over some system level results.

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Corrigendum: STE-QUEST—test of the universality of free fall using cold atom interferometry (2014 Class. Quantum Grav . 31 115010)

Abstract: Moreover, the meaning of the following statement in the introduction was not very clear and led to unfortunate interpretation of the performance of the redshift test.

Cited by 45 publications

References 60 publications

Characterization of a simultaneous dual-species atom interferometer for a quantum test of the weak equivalence principle

Characterization of a simultaneous dual-species atom interferometer for a quantum test of the weak equivalence principle

Session Summary: Experimental Gravitation

STE-QUEST mission and system design

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