Reading the phase of a Raman excitation with a multi-state atomic interferometer

Abstract

Atomic memories for flying photonic qubits are an essential ingredient for many applications like e.g. quantum repeaters. Verification of the coherent transfer of information from a light field to an atomic superposition is usually obtained using an optical read-out. In this paper we report the direct detection of the atomic coherence by means of atom interferometry. We experimentally verified both that a bichromatic laser field closing a Raman transition imprints a distinct, controllable phase on the atomic coherence and that it can be recovered after a variable time delay.

Atom Interferometer Gyroscope with Spin-Dependent Phase Shifts Induced by Light near a Tune-Out Wavelength

“…This work is a new application for tune-out wavelengths, paves the way for improving precision measurements of tune-out wavelengths, and demonstrates a new technique for atom interferometer gyroscopes. The spin-multiplexing techniques demonstrated here may find uses in other atom [12,13] and neutron [45,46] interferometry experiments, and also in NMR gyroscopes and NMR spectroscopy. This work is supported by NSF Grant No.…”

“…In particular, making a better gyroscope has been a long standing goal in the atom optics community because atom interferometers have the potential to outperform optical Sagnac gyroscopes. Advances in the precision and range of applications for atom interferometry have been realized by using interferometers with multiple atomic species [2][3][4][5], multiple atomic velocities [6][7][8][9][10], multiple atomic spin states [11][12][13], and multiple atomic path configurations [14][15][16][17][18]. Here, we use atoms with multiple spin states to demonstrate a new method for rotation sensing.…”

Precision Magnetic Field Sensing with Dual Multi-Wave Atom Interferometer

“…There have been some experimental results [ 39 , 40 ] on measuring magnetic fields with Raman two-photon interferometric methods in a two-level system. Experiments [ 29 , 30 , 35 , 41 ] have presented interference employing one-photon direct coupling or Raman two-photon coupling [ 42 ] in a multilevel system. We focus on the study of magnetometry in a multilevel system by RF coupling.…”

Implementation of a double-path multimode interferometer using a spinor Bose-Einstein condensate

“…Matter wave interferometers have brought us exciting opportunities of implementing high-precision measurements in both science and technology, including quantum information, quantum simulation and gravity measurements [1][2][3][4], as well as insight into fundamental issues of quantum physics such as internal properties of atoms, many-body phenomena and the interplay between general relativity and quantum mechanics [5][6][7][8][9][10]. Many researches have been carried out which focused on achieving a high performance of interferometers [11][12][13].…”