- 1 Photoassociation Spectroscopy of Ytterbium Atoms with Dipole-allowed in addition to Intercombination Transitions Group II Summary of my talk Determination of scattering length of 174Yb using dipole-allowed PAS Two-color PAS
- 2 Rudis, Al Features Writer
- 3 Journal Ratings by University of the Virgin Islands-Albert A. Sheen
Photoassociation Spectroscopy of Ytterbium Atoms with Dipole-allowed in addition to Intercombination Transitions Group II Summary of my talk Determination of scattering length of 174Yb using dipole-allowed PAS Two-color PAS
Rudis, Al, Features Writer has reference to this Academic Journal, PHwiki organized this Journal Photoassociation Spectroscopy of Ytterbium Atoms with Dipole-allowed in addition to Intercombination Transitions K. Enomoto, M. Kitagawa, K. Kasa, S. Tojo, T. Fukuhara, A. Yamaguchi, S. Uetake, Y. Takasu, in addition to Y. Takahashi, Kyoto University Ultracold Group II atoms: Theory in addition to Applications 06/Sep/18 ITAMP COE Group II Workshop on ultracold group II atoms 2000 Cold Alkaline-Earth Atoms (in ITAMP) 2003 Cold Alkaline-Earth Atoms (in Copenhagen) 2006 Sep/18-20 Ultracold Group II Atoms (in ITAMP) Atomic clock Number of invited speakers Experiment Theory Photoassociation Novel species/mixtures Others 4 1 4 5 5 1 3 5
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Next generation atomic clock 1S0-3P0 atomic transition has extremely narrow linewidth ( <0.1 Hz), in addition to is inert to a magnetic field. The atoms trapped in an optical lattice with the magic wavelength are free from the Doppler broadening in addition to the collisional shift. Frequency st in addition to ard with / ~ 10-17 Precise frequency measurements of Sr in addition to Yb in 1D lattice have been presented (NIST, JILA, SYRTE, PTB groups). The precision is about 5Hz. Photoassociation (PA) Ultracold atoms has narrow thermal distribution, so free-bound transitions (photoassociation) are observed with high resolution. This photoassociation is a powerful tool as long as probing rovibrational levels near the threshold in addition to scattering states. Such parameters are determined as long as Sr, Ca, in addition to Yb. Atomic parameters such as radiative lifetimes in addition to scattering lengths are determined precisely. Theory as long as optical control of collision, PA in low dimensions Novel species/mixtures Magneto-optical trap (MOT) of Ra (radium, =15day) Measurement of nuclear EDM MOT of Li-K-Sr mixture Novel cooper pair (heteronuclear, FFLO, etc.) Summary of my talk Level Diagram of Yb (6s6p)1P1 (6s2)1S0 (6s6p) 3P2 3P1 3P0 =15s ~ Outline 1. Experimental procedure 2. Determination of scattering length of 174Yb 3. Two-color PAS 4. Intercombination PAS of 4 isotopes 5. Optical Feshbach resonance Experimental procedure slower MOT horiz. FORT vertical FORT PA probe 10s 6s 100ms Typical time chart Experimental procedure slower MOT horiz. FORT vertical FORT PA probe 10s 6s 100ms Typical time chart Determination of scattering length of 174Yb using dipole-allowed PAS Spectra of dipole-allowed PAS PAS of 1S0-1P1 transition at ~1 K Ground-state wavefunction Wavefunction obtained from PA rates to various vibrational states Two-color PAS Two-color PA spectra of 174Yb Raman transition Recently, we succeeded in observing two-color PAS spectra as long as 174Yb at ~1 K. 174Yb 1S0-1P1 Frequency difference (MHz) Two-color PA spectra of 174Yb Next-to-the-last state level 268.6 MHz 1 2 Frequency difference (MHz) Dark state (1 is scanned) Autler-Townes spectroscopy (2 is scanned) These two-color PAS results determine C6 in addition to a more precisely. Scattering length of other isotopes Two-color PA spectroscopy of some isotopes will reveal the scattering lengths of all the isotopes in addition to their combinations. Scattering length pos. 6 nm small neg. small small large +10 - 5 Mass number 168 170 171 172 173 174 176 Intercombination PAS of bosonic (i=0) isotopes (174Yb, 176Yb ) PA spectrum of 174Yb v = 7 T ~ 4 mK At a low temperature of ~4 K, only transition from s-wave scattering state was observed. Even the vibrational level at 3 MHz from the disso- ciation limit was resolved. v : vibrational number counted from the dissociation limit. PA spectra of 174Yb & 176Yb (T~25 K) Difference between 174Yb & 176Yb Intercombination PAS of fermionic (i0) isotopes (171Yb, 173Yb ) hyperfine coupling coupling to molecular axis Potential calculation , :transition dipole, a:hyperfine coupling constant 171Yb (3P1) i =1/2, j =1 1S0, f1=1/2 3P1, f2=3/2,1/2 basis sym.: basis antisym.: , i in addition to are projection of in addition to to molecular axis, respectively. , i i j f (1S0) i =1/2, j =0
Pair potential of 171Yb2 [1S0+3P1(f=3/2)] Hyperfine-induced purely long-range states exist. F = 1, F = 0 F = 2 F = 1 F = 1 F = 2, F = 0 state sym.: state antisym.: f=3/2 f=3/2 PA spectrum of 171Yb p wave s wave T=1 T=2 T=3 T=1 p s purely long-range state Temperature ~20 K p Conclusion PAS with the intercombination transition d-wave shape resonance is inferred as long as 174Yb. Hyperfine-induced purely long-range state was observed. PAS with the dipole-allowed transition a = 5.53 ± 0.11 nm, C6 = 2300 ± 250 nm as long as 174Yb Two-color PAS of 174Yb Bound levels at 10.6 MHz in addition to 268.6 MHz were found. Optical Feshbach resonance with the intercombination line The asymmetric spectrum implies the change of a. 3P2 state atoms are trapped in the optical trap with high density. Quantum degenerate gases have been achieved as long as 5 isotopes.
Rudis, Al Features Writer
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Journal Ratings by University of the Virgin Islands-Albert A. Sheen
This Particular Journal got reviewed and rated by University of the Virgin Islands-Albert A. Sheen and short form of this particular Institution is VI and gave this Journal an Excellent Rating.