Paramagnetic Faraday rotation with spin-polarized ytterbium atoms

Takeuchi, M, Ichihara, S, Kumakura, M, Takahashi, Y, Takano, T, Takasu, Y, Yabuzaki, T

Published Dec 7, 2005• 9 citations

Abstract

We report observation of the paramagnetic Faraday rotation of spin-polarized ytterbium (Yb) atoms. As the sample of the atoms, we used atomic beam, released atom from magneto-optical trap (MOT), and trapped atoms in far-off-resonant trap (FORT). Since Yb is diamagnetic and has spin-1/2 isotope, it is an ideal sample for the spin physics, such as quantum non-demolition measurement of spin (spin QND), for example. From the results of the rotation angle, we confirmed that the atoms were almost perfectly polarized.

Related papers

Magneto-Optical Trapping of Ytterbium Atoms with a 398.9 nm Laser

Zhao Peng-Yi, Xiong Zhuan-Xian, Jie Liang +2 more

Chinese Physics LettersOct 1, 200816 citations

Polarization self-rotation in ultracold atomic Rb87

Travis Horrom, Salim Balik, A. Lezama +2 more

arXiv:1102.4041Physical Review AMay 31, 201117 citations

Spin noise measurement with diamagnetic atoms

Makoto Takeuchi, S. Ichihara, T. Takano +2 more

Physical Review AJun 27, 20076 citations

Very large optical rotation generated by Rb vapor in a multi-pass cell

S. Li, Pranjal Vachaspati, Sheng, D. +2 more

arXiv:1108.5334Aug 26, 20111 citation

Realization of quantum non-demolition measurement of nuclear spin 1∕2 of cold ytterbium atom

T. Takano, Ryo Namiki, Yoshiro Takahashi +1 more

AIP conference proceedingsJan 1, 20090 citations

Magneto-optical trapping of Yb atoms using an intercombination transition

T. Kuwamoto, Keita HONDA, Yoshiro Takahashi +1 more

Physical Review AAug 1, 1999166 citations

Paramagnetic Faraday rotation with spin-polarized ytterbium atoms

Takeuchi, M, Ichihara, S, Kumakura, M, Takahashi, Y, Takano, T, Takasu, Y, Yabuzaki, T

Published Dec 7, 2005• 9 citations

OpenAlex

Abstract

Related papers

Magneto-Optical Trapping of Ytterbium Atoms with a 398.9 nm Laser

Zhao Peng-Yi, Xiong Zhuan-Xian, Jie Liang +2 more

We report the realization of ytterbium magneto-optical trap (MOT) operating on the dipole-allowed 1 S 0 — 1 P 1 transition at 398.9 nm. The MOT is loaded by a slowed atomic beam produced by a Zeeman slower. All seven stable isotopes of Yb atoms could be trapped separately at different laser detuning values. Over 10 7 174 Yb atoms are collected in the MOT, whereas the atom number of fermionic isotope 171 Yb is roughly 2.3 × 10 6 due to a lower abundance. Without the Zeeman slower, the trapped atom numbers are one order of magnitude lower. Both the even and odd isotopes are recognized as excellent candidates of optical clock transition, so the cooling and trapping of ytterbium atoms by the blue MOT is an important step for building an optical clock.We report the realization of ytterbium magneto-optical trap (MOT) operating on the dipole-allowed 1 S 0 — 1 P 1 transition at 398.9 nm. The MOT is loaded by a slowed atomic beam produced by a Zeeman slower. All seven stable isotopes of Yb atoms could be trapped separately at different laser detuning values. Over 10 7 174 Yb atoms are collected in the MOT, whereas the atom number of fermionic isotope 171 Yb is roughly 2.3 × 10 6 due to a lower abundance. Without the Zeeman slower, the trapped atom numbers are one order of magnitude lower. Both the even and odd isotopes are recognized as excellent candidates of optical clock transition, so the cooling and trapping of ytterbium atoms by the blue MOT is an important step for building an optical clock.

Chinese Physics LettersOct 1, 200816 citations

Polarization self-rotation in ultracold atomic Rb87

Travis Horrom, Salim Balik, A. Lezama +2 more

We report on a combined experimental and theoretical study of polarization self-rotation in an ultracold atomic sample. In the experiments, a probe laser is tuned in the spectral vicinity of the ${D}_{1}$ line to observe polarization self-rotation in a sample of ultracold $^{87}\mathrm{Rb}$ prepared in a magneto-optical trap (MOT). Systematic measurements of the rotation angle of the light-polarization ellipse as a function of laser intensity, initial ellipticity, and detuning are made. The observations, in good agreement with theoretical simulations, are indicative of the presence of a residual static magnetic field, resulting in measured asymmetries in the rotation angle for right and left ellipticities. In this paper we present our detailed experimental results and analysis of the combined influences of polarization self-rotation and the Faraday effect.We report on a combined experimental and theoretical study of polarization self-rotation in an ultracold atomic sample. In the experiments, a probe laser is tuned in the spectral vicinity of the ${D}_{1}$ line to observe polarization self-rotation in a sample of ultracold $^{87}\mathrm{Rb}$ prepared in a magneto-optical trap (MOT). Systematic measurements of the rotation angle of the light-polarization ellipse as a function of laser intensity, initial ellipticity, and detuning are made. The observations, in good agreement with theoretical simulations, are indicative of the presence of a residual static magnetic field, resulting in measured asymmetries in the rotation angle for right and left ellipticities. In this paper we present our detailed experimental results and analysis of the combined influences of polarization self-rotation and the Faraday effect.

arXiv:1102.4041Physical Review AMay 31, 201117 citations

Spin noise measurement with diamagnetic atoms

Makoto Takeuchi, S. Ichihara, T. Takano +2 more

We report the measurement of the atomic spin noise of the diamagnetic atom ytterbium (Yb). Yb has various merits for utilizing the quantum nature of the atomic spin ensemble compared with the paramagnetic atoms used in all previous experiments. From the magnitude of the noise level and dependence on the detuning, we concluded that we succeeded in the measurement of $^{171}\mathrm{Yb}$ atomic spin noise in an atomic beam.We report the measurement of the atomic spin noise of the diamagnetic atom ytterbium (Yb). Yb has various merits for utilizing the quantum nature of the atomic spin ensemble compared with the paramagnetic atoms used in all previous experiments. From the magnitude of the noise level and dependence on the detuning, we concluded that we succeeded in the measurement of $^{171}\mathrm{Yb}$ atomic spin noise in an atomic beam.

Physical Review AJun 27, 20076 citations

Very large optical rotation generated by Rb vapor in a multi-pass cell

S. Li, Pranjal Vachaspati, Sheng, D. +2 more

Paramagnetic Faraday rotation is a powerful technique for atom sensing widely used in quantum non-demolition measurements, fundamental symmetry tests, and other precision measurements. We demonstrate the use of a multi-pass optical cell for Faraday rotation spectroscopy and observe polarization rotation in excess of 100 radians from spin-polarized Rb vapor. Unlike optical cavities, multi-pass cells have a deterministic number of light passes and can be used to measure large optical rotations. We also observe a 10-fold suppression of transverse spin relaxation when Rb atoms are placed in a coherent superposition state immune to spin-exchange collisions.Paramagnetic Faraday rotation is a powerful technique for atom sensing widely used in quantum non-demolition measurements, fundamental symmetry tests, and other precision measurements. We demonstrate the use of a multi-pass optical cell for Faraday rotation spectroscopy and observe polarization rotation in excess of 100 radians from spin-polarized Rb vapor. Unlike optical cavities, multi-pass cells have a deterministic number of light passes and can be used to measure large optical rotations. We also observe a 10-fold suppression of transverse spin relaxation when Rb atoms are placed in a coherent superposition state immune to spin-exchange collisions.

arXiv:1108.5334Aug 26, 20111 citation

Realization of quantum non-demolition measurement of nuclear spin 1∕2 of cold ytterbium atom

T. Takano, Ryo Namiki, Yoshiro Takahashi +1 more

We have demonstrated a quantum non‐demolition (QND) measurement with a collective spin of cold ytterbium atoms (171Yb) via Faraday rotation interaction, and have observed 1.8−1.5+2.4 dB spin squeezing. Since 171Yb atoms have only a nuclear spin of one‐half in the ground state, the system constitutes the simplest spin ensemble and is thus robust against decoherence. Furthermore, we have considered the atomic quantum swapping gate as a quantum information device using multiple Faraday rotation interactions, and have found that we can realize the quantum‐domain performance for a realistic experimental condition.We have demonstrated a quantum non‐demolition (QND) measurement with a collective spin of cold ytterbium atoms (171Yb) via Faraday rotation interaction, and have observed 1.8−1.5+2.4 dB spin squeezing. Since 171Yb atoms have only a nuclear spin of one‐half in the ground state, the system constitutes the simplest spin ensemble and is thus robust against decoherence. Furthermore, we have considered the atomic quantum swapping gate as a quantum information device using multiple Faraday rotation interactions, and have found that we can realize the quantum‐domain performance for a realistic experimental condition.

AIP conference proceedingsJan 1, 20090 citations

Magneto-optical trapping of Yb atoms using an intercombination transition

T. Kuwamoto, Keita HONDA, Yoshiro Takahashi +1 more

We report the magneto-optical trapping of ytterbium atoms using the ${6s}^{2}{}^{1}{S}_{0}\ensuremath{-}6s6p{}^{3}{P}_{1}$ intercombination transition. The magneto-optical trap is continuously loaded from an atomic beam decelerated by a Zeeman-tuned atomic-beam slower operated at the ${6s}^{2}{}^{1}{S}_{0}\ensuremath{-}6s6p{}^{1}{P}_{1}$ transition. Among seven stable isotopes of ytterbium, six isotopes $\mathrm{of}{ }^{170}\mathrm{Y}\mathrm{b},$ ${}^{171}\mathrm{Yb},$ ${}^{172}\mathrm{Yb},$ ${}^{173}\mathrm{Yb},$ ${}^{174}\mathrm{Yb},$ and ${}^{176}\mathrm{Yb}$ are successfully trapped. The number and density of the trapped atoms are about ${10}^{8}$ and ${10}^{11} {\mathrm{cm}}^{\ensuremath{-}3},$ respectively. The temperature of atoms is estimated to be about $20 \ensuremath{\mu}\mathrm{K}$ from the time-of-flight measurement. The decay time of the trapped atoms after stopping the loading of atoms is about 3 s.We report the magneto-optical trapping of ytterbium atoms using the ${6s}^{2}{}^{1}{S}_{0}\ensuremath{-}6s6p{}^{3}{P}_{1}$ intercombination transition. The magneto-optical trap is continuously loaded from an atomic beam decelerated by a Zeeman-tuned atomic-beam slower operated at the ${6s}^{2}{}^{1}{S}_{0}\ensuremath{-}6s6p{}^{1}{P}_{1}$ transition. Among seven stable isotopes of ytterbium, six isotopes $\mathrm{of}{ }^{170}\mathrm{Y}\mathrm{b},$ ${}^{171}\mathrm{Yb},$ ${}^{172}\mathrm{Yb},$ ${}^{173}\mathrm{Yb},$ ${}^{174}\mathrm{Yb},$ and ${}^{176}\mathrm{Yb}$ are successfully trapped. The number and density of the trapped atoms are about ${10}^{8}$ and ${10}^{11} {\mathrm{cm}}^{\ensuremath{-}3},$ respectively. The temperature of atoms is estimated to be about $20 \ensuremath{\mu}\mathrm{K}$ from the time-of-flight measurement. The decay time of the trapped atoms after stopping the loading of atoms is about 3 s.

Physical Review AAug 1, 1999166 citations

We report on a combined experimental and theoretical study of polarization self-rotation in an ultracold atomic sample. In the experiments, a probe laser is tuned in the spectral vicinity of the

{D}_{1}

line to observe polarization self-rotation in a sample of ultracold

^{87}\mathrm{Rb}

prepared in a magneto-optical trap (MOT). Systematic measurements of the rotation angle of the light-polarization ellipse as a function of laser intensity, initial ellipticity, and detuning are made. The observations, in good agreement with theoretical simulations, are indicative of the presence of a residual static magnetic field, resulting in measured asymmetries in the rotation angle for right and left ellipticities. In this paper we present our detailed experimental results and analysis of the combined influences of polarization self-rotation and the Faraday effect.

^{171}\mathrm{Yb}

atomic spin noise in an atomic beam.

\mathrm{of}{ }^{170}\mathrm{Y}\mathrm{b},

{}^{171}\mathrm{Yb},

{}^{172}\mathrm{Yb},

{}^{173}\mathrm{Yb},

{}^{174}\mathrm{Yb},

and

{}^{176}\mathrm{Yb}

are successfully trapped. The number and density of the trapped atoms are about

{10}^{8}

and ${10}^{11} {\mathrm{cm}}^{\ensuremath{-}3},$ respectively. The temperature of atoms is estimated to be about $20 \ensuremath{\mu}\mathrm{K}$ from the time-of-flight measurement. The decay time of the trapped atoms after stopping the loading of atoms is about 3 s.