المؤلفون: Stolzenberg, K., Struckmann, C., Bode, S., Li, R., Herbst, A., Vollenkemper, V., Thomas, D., Rasel, E. M., Gaaloul, N., Schlippert, D.

مصطلحات موضوعية: Physics - Atomic Physics, Quantum Physics

الوصف: Atom interferometers are an exquisite measurement tool for inertial forces. However, they are commonly limited to one single sensitive axis, allowing high-precision multi-dimensional sensing only through subsequent or postcorrected measurements. Here, we introduce a novel 2D-array-arrangement of Bose-Einstein Condensates (BEC) initialized utilizing time-averaged optical potentials for simultaneous multi-axis inertial sensing. Deploying a 3 x 3 BEC array covering 1.6 mm^2, we perform measurements of angular velocity and acceleration of a rotating reference mirror, as well as a linear acceleration, e.g., induced by gravity, gradients, and higher order derivatives. We anticipate increased sensitivity of our method in interferometers with large scale factors in long-baseline or satellite atom interferometry. Our work paves the way for simple high-precision multi-axis inertial sensing and we envision further applications, e.g., for three-dimensional wave front characterization.

URL الوصول: http://arxiv.org/abs/2403.08762

المؤلفون: Lévèque, T., Fallet, C., Lefebve, J., Piquereau, A., Gauguet, A., Battelier, B., Bouyer, P., Gaaloul, N., Lachmann, M., Piest, B., Rasel, E., Müller, J., Schubert, C., Beaufils, Q., Santos, F. Pereira Dos

مصطلحات موضوعية: Physics - Atomic Physics

الوصف: A strong potential gain for space applications is expected from the anticipated performances of inertial sensors based on cold atom interferometry (CAI) that measure the acceleration of freely falling independent atoms by manipulating them with laser light. In this context, CNES and its partners initiated a phase 0 study, called CARIOQA, in order to develop a Quantum Pathfinder Mission unlocking key features of atom interferometry for space and paving the way for future ambitious space missions utilizing this technology. As a cornerstone for the implementation of quantum sensors in space, the CARIOQA phase 0 aimed at defining the Quantum Pathfinder Mission's scenario and associated performance objectives. To comply with these objectives, the payload architecture has been designed to achieve long interrogation time and active rotation compensation on a BEC-based atom interferometer. A study of the satellite architecture, including all the subsystems, has been conducted. Several technical solutions for propulsion and attitude control have been investigated in order to guarantee optimal operating conditions (limitation of micro-vibrations, maximization of measurement time). A preliminary design of the satellite platform was performed.
Comment: Proceedings of International Conference on Space Optics (ICSO) 2022; 3-7 October 2022; Dubrovnik; Croatia

URL الوصول: http://arxiv.org/abs/2211.01215

المؤلفون: Albers, H., Corgier, R., Herbst, A., Rajagopalan, A., Schubert, C., Vogt, C., Woltmann, M., Lämmerzahl, C., Herrmann, S., Charron, E., Ertmer, W., Rasel, E. M., Gaaloul, N., Schlippert, D.

المصدر: Commun Phys 5, 60 (2022)

مصطلحات موضوعية: Physics - Atomic Physics, Quantum Physics

الوصف: The stability of matter-wave sensors benefits from interrogating large-particle-number atomic ensembles at high cycle rates. The use of quantum-degenerate gases with their low effective temperatures allows constraining systematic errors towards highest accuracy, but their production by evaporative cooling is costly with regard to both atom number and cycle rate. In this work, we report on the creation of cold matter-waves using a crossed optical dipole trap and shaping it by means of an all-optical matter-wave lens. We demonstrate the trade off between residual kinetic energy and atom number by short-cutting evaporative cooling and estimate the corresponding performance gain in matter-wave sensors. Our method is implemented using time-averaged optical potentials and hence easily applicable in optical dipole trapping setups.
Comment: 10 pages, 5 figures

URL الوصول: http://arxiv.org/abs/2109.08608

المؤلفون: Anders, F., Idel, A., Feldmann, P., Bondarenko, D., Loriani, S., Lange, K., Peise, J., Gersemann, M., Meyer, B., Abend, S., Gaaloul, N., Schubert, C., Schlippert, D., Santos, L., Rasel, E., Klempt, C.

المصدر: Phys. Rev. Lett. 127, 140402 (2021)

مصطلحات موضوعية: Quantum Physics, Condensed Matter - Quantum Gases, Physics - Atomic Physics

الوصف: Compared to light interferometers, the flux in cold-atom interferometers is low and the associated shot noise large. Sensitivities beyond these limitations require the preparation of entangled atoms in different momentum modes. Here, we demonstrate a source of entangled atoms that is compatible with state-of-the-art interferometers. Entanglement is transferred from the spin degree of freedom of a Bose-Einstein condensate to well-separated momentum modes, witnessed by a squeezing parameter of -3.1(8) dB. Entanglement-enhanced atom interferometers open up unprecedented sensitivities for quantum gradiometers or gravitational wave detectors.
Comment: 9 pages, 5 figures

URL الوصول: http://arxiv.org/abs/2010.15796

المؤلفون: Wodey, E., Rengelink, R. J., Meiners, C., Rasel, E. M., Schlippert, D.

المصدر: J. Phys. B: At. Mol. Opt. Phys. 54 035301 (2021)

مصطلحات موضوعية: Physics - Atomic Physics

الوصف: We present a high-flux source of cold ytterbium atoms that is robust, lightweight and low-maintenance. Our apparatus delivers $10^9$ atoms/s into a 3D magneto-optical trap without requiring water-cooling or high current power supplies. We achieve this by employing a Zeeman slower and a 2D magneto-optical trap fully based on permanent magnets in Halbach configurations. This strategy minimizes mechanical complexity, stray magnetic fields, and heat production while requiring little to no maintenance, making it applicable to both embedded systems that seek to minimize electrical power consumption, and large scale experiments to reduce the complexity of their subsystems.
Comment: 12 pages, 8 figures

URL الوصول: http://arxiv.org/abs/2008.07498

المؤلفون: Bochkati, M., Schon, S., Schlippert, D., Schubert, C., Rasel, E.

المصدر: 2017 DGON Inertial Sensors and Systems (ISS) Inertial Sensors and Systems (ISS), 2017. :1-20 Sep, 2017

Relation: 2017 DGON Inertial Sensors and Systems (ISS)

المؤلفون: Canuel, B., Abend, S., Amaro-Seoane, P., Badaracco, F., Beaufils, Q., Bertoldi, A., Bongs, K., Bouyer, P., Braxmaier, C., Chaibi, W., Christensen, N., Fitzek, F., Flouris, G., Gaaloul, N., Gaffet, S., Alzar, C. L. Garrido, Geiger, R., Guellati-Khelifa, S., Hammerer, K., Harms, J., Hinderer, J., Holynski, M., Junca, J., Katsanevas, S., Klempt, C., Kozanitis, C., Krutzik, M., Landragin, A., Roche, I. Làzaro, Leykauf, B., Lien, Y. -H., Loriani, S., Merlet, S., Merzougui, M., Nofrarias, M., Papadakos, P., Santos, F. Pereira dos, Peters, A., Plexousakis, D., Prevedelli, M., Rasel, E. M., Rogister, Y., Rosat, S., Roura, A., Sabulsky, D. O., Schkolnik, V., Schlippert, D., Schubert, C., Sidorenkov, L., Siemß, J. -N., Sopuerta, C. F., Sorrentino, F., Struckmann, C., Tino, G. M., Tsagkatakis, G., Viceré, A., von Klitzing, W., Woerner, L., Zou, X.

مصطلحات موضوعية: Physics - Atomic Physics

الوصف: We proposed the European Laboratory for Gravitation and Atom-interferometric Research (ELGAR), an array of atom gradiometers aimed at studying space-time and gravitation with the primary goal of observing gravitational waves (GWs) in the infrasound band with a peak strain sensitivity of $3.3 \times 10^{-22}/\sqrt{\text{Hz}}$ at 1.7 Hz. In this paper we detail the main technological bricks of this large scale detector and emphasis the research pathways to be conducted for its realization. We discuss the site options, atom optics, and source requirements needed to reach the target sensitivity. We then discuss required seismic isolation techniques, Gravity Gradient Noise reduction strategies, and the metrology of various noise couplings to the detector.
Comment: This paper contains the technical aspects of the ELGAR facility. This content was originally included in arXiv:1911.03701 and will finally be published separately

URL الوصول: http://arxiv.org/abs/2007.04014

المؤلفون: Albers, H., Herbst, A., Richardson, L. L., Heine, H., Nath, D., Hartwig, J., Schubert, C., Vogt, C., Woltmann, M., Lämmerzahl, C., Herrmann, S., Ertmer, W., Rasel, E. M., Schlippert, D.

المصدر: Eur. Phys. J. D (2020) 74: 145

مصطلحات موضوعية: Physics - Atomic Physics, General Relativity and Quantum Cosmology, Quantum Physics

الوصف: We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges and solutions relevant when operating a potassium interferometer, as well as systematic effects affecting our measurement. Our determination of the E\"otv\"os ratio yields $\eta_{\,\text{Rb,K}}=-1.9\times10^{-7}$ with a combined standard uncertainty of $\sigma_\eta=3.2\times10^{-7}$.

URL الوصول: http://arxiv.org/abs/2003.00939

المؤلفون: Wodey, E., Tell, D., Rasel, E. M., Schlippert, D., Baur, R., Kissling, U., Kölliker, B., Lorenz, M., Marrer, M., Schläpfer, U., Widmer, M., Ufrecht, C., Stuiber, S., Fierlinger, P.

المصدر: Rev. Sci. Instrum. 91, 035117 (2020)

مصطلحات موضوعية: Physics - Instrumentation and Detectors, Physics - Atomic Physics

الوصف: We report on the design, construction, and characterization of a 10 m-long high-performance magnetic shield for Very Long Baseline Atom Interferometry (VLBAI). We achieve residual fields below 4 nT and longitudinal inhomogeneities below 2.5 nT/m over 8 m along the longitudinal direction. Our modular design can be extended to longer baselines without compromising the shielding performance. Such a setup constrains biases associated with magnetic field gradients to the sub-pm/$\textrm{s}^2$ level in atomic matterwave accelerometry with rubidium atoms and paves the way towards tests of the universality of free fall with atomic test masses beyond the $10^{-13}$ level.
Comment: 6 pages, 5 figures

URL الوصول: http://arxiv.org/abs/1911.12320

المؤلفون: Canuel, B., Abend, S., Amaro-Seoane, P., Badaracco, F., Beaufils, Q., Bertoldi, A., Bongs, K., Bouyer, P., Braxmaier, C., Chaibi, W., Christensen, N., Fitzek, F., Flouris, G., Gaaloul, N., Gaffet, S., Alzar, C. L. Garrido, Geiger, R., Guellati-Khelifa, S., Hammerer, K., Harms, J., Hinderer, J., Junca, J., Katsanevas, S., Klempt, C., Kozanitis, C., Krutzik, M., Landragin, A., Roche, I. Làzaro, Leykauf, B., Lien, Y. -H., Loriani, S., Merlet, S., Merzougui, M., Nofrarias, M., Papadakos, P., Pereira, F., Peters, A., Plexousakis, D., Prevedelli, M., Rasel, E., Rogister, Y., Rosat, S., Roura, A., Sabulsky, D. O., Schkolnik, V., Schlippert, D., Schubert, C., Sidorenkov, L., Siemß, J. -N., Sopuerta, C. F., Sorrentino, F., Struckmann, C., Tino, G. M., Tsagkatakis, G., Viceré, A., von Klitzing, W., Woerner, L., Zou, X.

المصدر: Class. Quantum Grav. 37 225017 (2020)

مصطلحات موضوعية: Physics - Atomic Physics, General Relativity and Quantum Cosmology

الوصف: Gravitational Waves (GWs) were observed for the first time in 2015, one century after Einstein predicted their existence. There is now growing interest to extend the detection bandwidth to low frequency. The scientific potential of multi-frequency GW astronomy is enormous as it would enable to obtain a more complete picture of cosmic events and mechanisms. This is a unique and entirely new opportunity for the future of astronomy, the success of which depends upon the decisions being made on existing and new infrastructures. The prospect of combining observations from the future space-based instrument LISA together with third generation ground based detectors will open the way towards multi-band GW astronomy, but will leave the infrasound (0.1 Hz to 10 Hz) band uncovered. GW detectors based on matter wave interferometry promise to fill such a sensitivity gap. We propose the European Laboratory for Gravitation and Atom-interferometric Research (ELGAR), an underground infrastructure based on the latest progress in atomic physics, to study space-time and gravitation with the primary goal of detecting GWs in the infrasound band. ELGAR will directly inherit from large research facilities now being built in Europe for the study of large scale atom interferometry and will drive new pan-European synergies from top research centers developing quantum sensors. ELGAR will measure GW radiation in the infrasound band with a peak strain sensitivity of $4.1 \times 10^{-22}/\sqrt{\text{Hz}}$ at 1.7 Hz. The antenna will have an impact on diverse fundamental and applied research fields beyond GW astronomy, including gravitation, general relativity, and geology.

URL الوصول: http://arxiv.org/abs/1911.03701