Zobrazeno 1 - 10
of 853
pro vyhledávání: '"Hollberg, L."'
Autor:
Newman, Z. L., Maurice, V., Drake, T. E., Stone, J. R., Briles, T. C., Spencer, D. T., Fredrick, C., Li, Q., Westly, D., Ilic, B. R., Shen, B., Suh, M. -G., Yang, K. Y., Johnson, C., Johnson, D. M. S., Hollberg, L., Vahala, K., Srinivasan, K., Diddams, S. A., Kitching, J., Papp, S. B., Hummon, M. T
Laboratory optical atomic clocks achieve remarkable accuracy (now counted to 18 digits or more), opening possibilities to explore fundamental physics and enable new measurements. However, their size and use of bulk components prevent them from being
Externí odkaz:
http://arxiv.org/abs/1811.00616
Field Compensation of Field Frequency Shifts in the Ramsey Spectroscopy of Clock Optical Transitions
We develop the method of Ramsey spectroscopy with the use of an additional field compensating the frequency shifts of clock optical transitions. This method in combination with the method of magnetically induced excitation of strongly forbidden trans
Externí odkaz:
http://arxiv.org/abs/0810.3854
Autor:
Poli, N., Barber, Z. W., Lemke, N. D., Oates, C. W., Ma, L. S., Stalnaker, J. E., Fortier, T. M., Diddams, S. A., Hollberg, L., Bergquist, J. C., Brusch, A., Jefferts, S., Heavner, T., Parker, T.
We report an uncertainty evaluation of an optical lattice clock based on the $^1S_0\leftrightarrow^3P_0$ transition in the bosonic isotope $^{174}$Yb by use of magnetically induced spectroscopy. The absolute frequency of the $^1S_0\leftrightarrow^3P_
Externí odkaz:
http://arxiv.org/abs/0803.4503
Autor:
Barber, Z. W., Stalnaker, J. E., Lemke, N. D., Poli, N., Oates, C. W., Fortier, T. M., Diddams, S. A., Hollberg, L., Hoyt, C. W.
We present an experimental study of the lattice induced light shifts on the 1S_0-3P_0 optical clock transition (v_clock~518 THz) in neutral ytterbium. The ``magic'' frequency, v_magic, for the 174Yb isotope was determined to be 394 799 475(35)MHz, wh
Externí odkaz:
http://arxiv.org/abs/0802.0222
Publikováno v:
Phys. Rev. A 75 (rapid comm.), 040502 (2007)
We apply direct frequency-comb spectroscopy, in combination with precision cw spectroscopy, to measure the ${\rm 4s4p} ^3P_1 \to {\rm 4s5s} ^3S_1$ transition frequency in cold calcium atoms. A 657 nm ultrastable cw laser was used to excite atoms on t
Externí odkaz:
http://arxiv.org/abs/physics/0701187
Autor:
Fortier, T. M., Coq, Y. Le, Stalnaker, J. E., Ortega, D., Diddams, S. A., Oates, C. W., Hollberg, L.
Publikováno v:
Phys. Rev. Lett., 97, 163905 (2006)
We have performed sub-Doppler spectroscopy on the narrow intercombination line of cold calcium atoms using the amplified output of a femtosecond laser frequency comb. Injection locking of a 657-nm diode laser with a femtosecond comb allows for two re
Externí odkaz:
http://arxiv.org/abs/physics/0605034
We develop a method of spectroscopy that uses a weak static magnetic field to enable direct optical excitation of forbidden electric-dipole transitions that are otherwise prohibitively weak. The power of this scheme is demonstrated using the importan
Externí odkaz:
http://arxiv.org/abs/physics/0510048
We report the direct excitation of the highly forbidden (6s^2) 1S0 - (6s6p) 3P0 optical transition in two odd isotopes of ytterbium. As the excitation laser frequency is scanned, absorption is detected by monitoring the depletion from an atomic cloud
Externí odkaz:
http://arxiv.org/abs/physics/0503240
Autor:
Sterr, U., Degenhardt, C., Stoehr, H., Lisdat, Ch., Schnatz, H., Helmcke, J., Riehle, F., Wilpers, G., Oates, Ch., Hollberg, L.
We describe the current status of the Ca optical frequency standards with laser-cooled neutral atoms realized in two different laboratories for the purpose of developing a possible future optical atomic clock. Frequency measurements performed at the
Externí odkaz:
http://arxiv.org/abs/physics/0411094
Using laser optical pumping, widths and frequency shifts are determined for microwave transitions between ground-state hyperfine components of $^{85}$Rb and $^{87}$Rb atoms contained in vapor cells with alkane anti-relaxation coatings. The results ar
Externí odkaz:
http://arxiv.org/abs/physics/0408009