Zobrazeno 1 - 10
of 713
pro vyhledávání: '"Wyllie, R"'
Publikováno v:
Opt. Express 28, 36696-36705 (2020)
In this work we demonstrate a high sensitivity atomic gradiometer capable of operation in earth-field level environments. We apply a light-pulse sequence at four times the Larmor frequency to achieve gradiometer sensitivity <20 fT/cm/$\sqrt{\rm Hz}$
Externí odkaz:
http://arxiv.org/abs/2008.13234
Autor:
Goldschmidt, E. A., Norris, D. G., Koller, S. B., Wyllie, R., Brown, R. C., Porto, J. V., Safronova, U. I., Safronova, M. S.
Magic wavelengths, for which there is no differential ac Stark shift for the ground and excited state of the atom, allow trapping of excited Rydberg atoms without broadening the optical transition. This is an important tool for implementing quantum g
Externí odkaz:
http://arxiv.org/abs/1503.02881
Publikováno v:
Rev. Sci. Instrum. 84, 096101 (2013)
We present two complementary designs of pneumatically actuated and kinematically positioned optics mounts: one designed for vertical mounting and translation, the other designed for horizontal mounting and translation. The design and measured stabili
Externí odkaz:
http://arxiv.org/abs/1412.8565
Publikováno v:
Science, Vol. 348, pp. 540-544 (2015)
The competition of magnetic exchange interactions and tunneling underlies many complex quantum phenomena observed in real materials. We study non-equilibrium magnetization dynamics in an extended 2D system by loading effective spin-1/2 bosons into a
Externí odkaz:
http://arxiv.org/abs/1411.7036
We demonstrate that spin-exchange dephasing of Larmor precession at near-earth-scale fields is effectively eliminated by dressing the alkali-metal atom spins in a sequence of AC-coupled 2-pi pulses, repeated at the Larmor precession frequency. The co
Externí odkaz:
http://arxiv.org/abs/1304.3737
In atomic magnetometers, the vector AC-Stark shift associated with circularly polarized light generates spatially varying effective magnetic fields which limit the magnetometer response and serve as sources of noise. We describe a scheme whereby opti
Externí odkaz:
http://arxiv.org/abs/1212.5624
Publikováno v:
2012 Phys. Med. Biol. 57 2619
We present a portable four-channel atomic magnetometer array operating in the spin exchange relaxation-free regime. The magnetometer array has several design features intended to maximize its suitability for biomagnetic measurement, specifically foet
Externí odkaz:
http://arxiv.org/abs/1106.4779
We present measurements of the circular dichroism of optically pumped Rb vapor near the D1 resonance line. Collisions with the buffer gases $^3$He and N$_2$ reduce the transparency of the vapor, even when fully polarized. We use two methods to measur
Externí odkaz:
http://arxiv.org/abs/1007.5486
We present measurements, using two complementary methods, of the breakdown of atomic angular momentum selection rules in He-broadened Rb vapor. Atomic dark states are rendered weakly absorbing due to fine-structure mixing during Rb-He collisions. The
Externí odkaz:
http://arxiv.org/abs/1003.4292