Paschen-Back effect of ultracold rubidium atoms in low magnetic field

We precisely investigate the Zeeman and Paschen-Back effects of the hyperfine structure during the rubidium $5{\phantom{\rule{0.16em}{0ex}}}^{2}{S}_{1/2}\ensuremath{\rightarrow}5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}$ two-photon transition. Owing to the high sensitivity of the $D$ state of atoms to a magnetic field, the splittings of the spectra of the $D$ state are sufficiently large in a weak magnetic field of $<10$ G. We experimentally observe how in the hyperfine coupling in the $5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}$ state is disrupted even in weak magnetic fields around 10 G and the energy levels are arranged according to their total angular momentum $J$ and nuclear spin $I$ . The transient of the spectra known as the Paschen-Back effect is observed even in a weak magnetic field with an order of magnitude of several tens of gauss. The results of theoretical calculations for energy shifts and transition intensities under a magnetic field are in quantitative agreement with the experimental results.We precisely investigate the Zeeman and Paschen-Back effects of the hyperfine structure during the rubidium $5{\phantom{\rule{0.16em}{0ex}}}^{2}{S}_{1/2}\ensuremath{\rightarrow}5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}$ two-photon transition. Owing to the high sensitivity of the $D$ state of atoms to a magnetic field, the splittings of the spectra of the $D$ state are sufficiently large in a weak magnetic field of $<10$ G. We experimentally observe how in the hyperfine coupling in the $5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}$ state is disrupted even in weak magnetic fields around 10 G and the energy levels are arranged according to their total angular momentum $J$ and nuclear spin $I$. The transient of the spectra known as the Paschen-Back effect is observed even in a weak magnetic field with an order of magnitude of several tens of gauss. The results of theoretical calculations for energy shifts and transition intensities under a magnetic field are in quantitative agreement with the experimental results.

Physical Review AMay 28, 20194 citations

Splitting of the electromagnetically induced transparency resonance on 85Rb atoms in strong magnetic fields up to the Paschen-Back regime

Armen D. Sargsyan, R. Mirzoyan, David G. Sarkisyan

Electromagnetically induced transparency (EIT) resonance in strong magnetic fields of up to 1.7 kG has been investigated with the use of a 30-μm cell filled with an atomic rubidium vapor and neon as a buffer gas. The EIT resonance in the Λ system of the D 1 line of 85 Rb atoms has been formed with the use of two narrowband (∼1 MHz) 795-nm diode lasers. The EIT resonance in a longitudinal magnetic field is split into five components. It has been demonstrated that the frequencies of the five EIT components are either blue- or red-shifted with an increase in the magnetic field, depending on the frequency ν P of the probe laser. In has been shown that in both cases the 85 Rb atoms enter the hyperfine Paschen-Back regime in magnetic fields of >1 kG. The hyperfine Paschen-Back regime is manifested by the frequency slopes of all five EIT components asymptotically approaching the same fixed value. The experiment agrees well with the theory.Electromagnetically induced transparency (EIT) resonance in strong magnetic fields of up to 1.7 kG has been investigated with the use of a 30-μm cell filled with an atomic rubidium vapor and neon as a buffer gas. The EIT resonance in the Λ system of the D 1 line of 85 Rb atoms has been formed with the use of two narrowband (∼1 MHz) 795-nm diode lasers. The EIT resonance in a longitudinal magnetic field is split into five components. It has been demonstrated that the frequencies of the five EIT components are either blue- or red-shifted with an increase in the magnetic field, depending on the frequency ν P of the probe laser. In has been shown that in both cases the 85 Rb atoms enter the hyperfine Paschen-Back regime in magnetic fields of >1 kG. The hyperfine Paschen-Back regime is manifested by the frequency slopes of all five EIT components asymptotically approaching the same fixed value. The experiment agrees well with the theory.

Journal of Experimental and Theoretical Physics LettersNov 1, 201225 citations

Ultracold atoms in strong synthetic magnetic fields

Wolfgang Ketterle

Bulletin of the American Physical SocietyMar 2, 20150 citations

Interactions of cold rubidium atoms with a magnetic reflector

Timothy Roach, Katelyn Candee

Bulletin of the American Physical SocietyJun 3, 20140 citations

D

state of atoms to a magnetic field, the splittings of the spectra of the

D

state are sufficiently large in a weak magnetic field of

<10

G. We experimentally observe how in the hyperfine coupling in the

5{\phantom{\rule{0.16em}{0ex}}}^{2}{D}_{5/2}

state is disrupted even in weak magnetic fields around 10 G and the energy levels are arranged according to their total angular momentum

J

and nuclear spin

I

. The transient of the spectra known as the Paschen-Back effect is observed even in a weak magnetic field with an order of magnitude of several tens of gauss. The results of theoretical calculations for energy shifts and transition intensities under a magnetic field are in quantitative agreement with the experimental results.