[11a-N307-1~9] 4.7 Quantum Optics and Nonlinear Optics

▲ [11a-N307-3] Precise magnetometry with a spin squeezed ultracold gas and squeezed light

〇Kosuke Shibata¹, Naota Sekiguchi¹, Aki Torii¹, Junnosuke Takai¹, Takuya Hirano¹ (1.Gakushuin Univ.)

Keywords:magnetometry, spin squeezing, squeezed light

We are now developing an ultrasensitive magnetometer with a Bose-Einstein condensate (BEC) of ⁸⁷Rb atoms. We aim to squeeze quantum noises of atoms and light to achieve an unprecedented sensitivity and to explore an open question on the limitation of the magnetic field sensitivity per volume. We have realized sensitive BEC magnetometry, spin squeezing of a BEC compatible with our magnetometry method, and squeezed light for probing the BEC. These achievements are important constituents for a quantum ultrasensitive magnetometry.