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LASER DIAGNOSTICS AND SPECTROSCOPY
Single-layer atom chip for quantum metrology
A. Afanasiev1, P. Skakunenko u, D. Bykova1'3, A. Kalmykov 1, R. Kirtaev 2, D. Negrov2, V. Balykin1
1-Institute of Spectroscopy Russian Academy of Sciences, Fizicheskaya Str., 5, Moscow, Troitsk, 108840, Russia
2-Moscow Institute of Physics and Technology, 9 Institutskiyper., Dolgoprudny, Moscow Reg., 141700, Russia
3- National Research University Higher School of Economics, Myasnitskaya str., 20, Moscow, 101000, Russia
Atom interferometry is considered as a new platform for high precision fundamental experiments and for solving numerous applied problems. Among the fundamental problems are the following: the detection of gravitational waves, the search for dark matter, tests of dark energy theories, tests of the equivalence principle and validity of quantum mechanics at macroscopic scale. Among the applied problems, the most important, are the study of the Earth's gravitational field and applications to navigation. Obviously, the development of an atom interferometry approaches gives us the new stage of quantum metrology.
One of the most important approaches in the implementation of atomic interferometry is the using of atom chip technology [1]. Atom chip is the combination of advanced industrial microelectronics technology and atom optical techniques to generate and control ultracold atomic ensembles. An atom chip can provide the ability to trap and manipulate atoms. The atom chip also enables Bose-Einstein condensation (BEC) of atoms.
The First Russian atom chip is depicted on the figure 1. The main advantage of such chip is the possibility of continuous loading of magneto-optical trap near the surface using single-layer configuration. It's shown [2] that near the atom chip was trapped about N ~ 3-105 atoms with concentration of n»1010 cm-3. The temperature of the atoms in the trap was about 200 ^K.
Fig. 1. The First Russian atom chip
Such a chip can be used as source of cold atoms for atom interferometry experiments. For this purpose, atoms will recapture with magnetic trap with additional cooling. As the first quantum sensors, atom clock and gravimeter will be demonstrated.
[1] M. Keil, et. al, "Fifteen years of cold matter on the atom chip: promise, realizations, and prospects", Journal of Modern Optics, 63, 1840, (2016).
[2] A.E. Afanasiev, et al., "Single-layer atom chip for continuous operation: Design, fabrication and performance", Optics & Laser
Technology, 148, 107698 (2022).
ALT'22
