STE-QUEST—test of the universality of free fall using cold atom interferometry

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; Landragin, Arnaud; 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, Christian; 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; Zahzam, Nassim

doi:10.1088/0264-9381/31/11/115010

Cited by 215 publications

(218 citation statements)

References 72 publications

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“…More recently, this mixture has been used in atom interferometry experiments where a second species can be used to remove common mode noise or test the weak equivalence principle [49][50][51][52][53][54].…”

Section: Mixtures Of 85 Rb-87 Rbmentioning

confidence: 99%

Species-selective confinement of atoms dressed with multiple radiofrequencies

Bentine

Harte

Luksch

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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Abstract.Methods to manipulate the individual constituents of an ultracold quantum gas mixture are essential tools for a number of applications, for example the direct quantum simulation of impurity physics. We investigate a scheme in which species-selective control is achieved using magnetic potentials dressed with multiple radiofrequencies, exploiting the different Landé g F -factors of the constituent atomic species. We describe a mixture dressed with two frequencies, where atoms are confined in harmonic potentials with a controllable degree of overlap between the two atomic species. This is then extended to a four radiofrequency scheme in which a double well potential for one species is overlaid with a single well for the other. The discussion is framed with parameters that are suitable for a 85 Rb and 87 Rb mixture, but is readily generalised to other combinations.arXiv:1701.05819v1 [cond-mat.quant-gas]

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Section: Mixtures Of 85 Rb-87 Rbmentioning

confidence: 99%

Species-selective confinement of atoms dressed with multiple radiofrequencies

Bentine

Harte

Luksch

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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“…Use of the cavity mode itself to detect intracavity matter wave interference could even allow for nondemolition continuous force detection as proposed in [38,39]. In addition, the compact size and low power requirements make a cavity interferometer ideal for future mobile or space-based applications [40]. Finally, the techniques FIG.…”

Section: Prl 114 100405 (2015) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 99%

More Power to Atom Interferometry

Cronin

Trubko²

2015

Physics

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We propose and demonstrate a new scheme for atom interferometry, using light pulses inside an optical cavity as matter wave beam splitters. The cavity provides power enhancement, spatial filtering, and a precise beam geometry, enabling new techniques such as low power beam splitters (< 100 μW), large momentum transfer beam splitters with modest power, or new self-aligned interferometer geometries utilizing the transverse modes of the optical cavity. As a first demonstration, we obtain Ramsey-Raman fringes with > 75% contrast and measure the acceleration due to gravity, g, to 60 μg= ffiffiffiffiffiffi Hz p resolution in a Mach-Zehnder geometry. We use > 10 7 cesium atoms in the compact mode volume (600 μm 1=e 2 waist) of the cavity and show trapping of atoms in higher transverse modes. This work paves the way toward compact, high sensitivity, multiaxis interferometry. DOI: 10.1103/PhysRevLett.114.100405 PACS numbers: 03.75.Dg, 06.30.Gv, 37.25.+k, 37.30.+i In a light-pulse atom interferometer, recoils from photonatom interactions are used to split and interfere matter waves (see Fig. 1). These interferometers have been used to measure the gravitational accelerationg [1], rotationΩ [2], gravity gradients [3], the fine structure constant [4], Newton's gravitational constant [5,6], and absolute masses in a proposed revision of the SI [7,8], to test Einstein's equivalence principle [9][10][11][12], and have been proposed to measure the free fall of antimatter [13] and to detect gravitational waves [14][15][16]. The sensitivity of a conventional Mach-Zehnder interferometer increases with the measured phase difference(whereṽ 0 is the initial velocity of the atom), which scales with the pulse separation time T and the recoil momentum p ¼ ℏk eff , wherek eff is the effective wave number of the photons. State of the art atom interferometers are limited by several engineering boundaries. T is limited by the free-fall time in atomic fountains, which are now as high as 10 m [17,18]. Multiphoton interactions can increase the recoil momentum to a multiple nℏk of the single photon recoil [19][20][21][22][23] but are limited by the available laser power (e.g., 6 W in [24], 43 W in [25]). Finally, wave front distortions spread the local wave vector around its mean, lowering interference contrast and reducing both sensitivity and accuracy. An optical cavity can solve these problems by providing spatial filtering to clean the wave fronts and enhancing laser intensity. However, running an atom interferometer inside an optical cavity presents challenges in keeping the atoms in the relatively small cavity mode volume and having multiple laser frequencies (needed due to recoil frequency shifts, Doppler shifts, and atomic structure) simultaneously resonant with the cavity. Here, we present a cesium atom interferometer inside an in-vacuum optical cavity and demonstrate gravity measurements using less than 100 μW of laser power incident on the cavity.The use of an optical cavity has many advantages. First, laser power limits interferom...

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“…These devices are so precise that they are used today as references for fundamental constants (mass, gravity), and are powerful candidates to test the theory of General Relativity on surface-based [18,19,20], subterranean [21] or in Space-based laboratories [22,23]. Projects are currently underway to verify the universality of free fall (UFF) [19,24,20,23,25,26,27], to detect gravitational waves in a frequency range yet unreachable with current laser-based detectors [28,29,30], and to test dark energy [31,32]. Nowadays, many efforts are devoted to designing compact, robust and mobile sensors [33,34].…”

Section: Introductionmentioning

confidence: 99%

Inertial quantum sensors using light and matter

2016

Self Cite

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Abstract. The past few decades have seen dramatic progress in our ability to manipulate and coherently control matter-waves. Although the duality between particles and waves has been well tested since de Broglie introduced the matter-wave analog of the optical wavelength in 1924, manipulating atoms with a level of coherence that enables one to use these properties for precision measurements has only become possible with our ability to produce atomic samples exhibiting temperatures of only a few millionths of a degree above absolute zero. Since the initial experiments a few decades ago, the field of atom optics has developed in many ways, with both fundamental and applied significance. The exquisite control of matter waves offers the prospect of a new generation of force sensors exhibiting unprecedented sensitivity and accuracy, for applications from navigation and geophysics to tests of general relativity. Thanks to the latest developments in this field, the first commercial products using this quantum technology are now available. In the future, our ability to create large coherent ensembles of atoms will allow us an even more precise control of the matter-wave and the ability to create highly entangled states for non-classical atom interferometry.

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STE-QUEST—test of the universality of free fall using cold atom interferometry

Cited by 215 publications

References 72 publications

Species-selective confinement of atoms dressed with multiple radiofrequencies

Species-selective confinement of atoms dressed with multiple radiofrequencies

More Power to Atom Interferometry

Inertial quantum sensors using light and matter

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