Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Gretchen K. Campbell"'
Publikováno v:
Physical Review Research, Vol 1, Iss 3, p 033113 (2019)
Isotope-shift spectroscopy with narrow optical transitions provides a benchmark for atomic structure calculations and has also been proposed as a way to constrain theories predicting physics beyond the standard model. Here we measure frequency shifts
Externí odkaz:
https://doaj.org/article/9ae5af12dfdf46238bf73f54f64cf169
Most atomic physics experiments are controlled by a digital pattern generator used to synchronize all equipment by providing triggers and clocks. Recently, the availability of well-documented open-source development tools has lifted the barriers to u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cca963de517847973ccc40e91e1d860
http://arxiv.org/abs/2102.11230
http://arxiv.org/abs/2102.11230
Autor:
Ananya Sitaram, Stephen Eckel, Peter Elgee, Daniel S. Barker, Gretchen K. Campbell, Nikolai N. Klimov
We demonstrate a compact magneto-optical trap (MOT) of alkaline-earth atoms using a nanofabricated diffraction grating chip. A single input laser beam, resonant with the broad $^1$S$_0\,\rightarrow \,^1$P$_1$ transition of strontium, forms the MOT in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7e69905de4377d33082cd138a1d7c8a
Autor:
Alexey V. Gorshkov, Fred Jendrzejewski, Gretchen K. Campbell, Tobias Tiecke, Stephen Eckel, Liang Jiang, Gediminas Juzeliūnas
Publikováno v:
Physical review. A. 94
We propose a new method for creating far-field optical barrier potentials for ultracold atoms with widths that are narrower than the diffraction limit and can approach tens of nanometers. The reduced widths stem from the nonlinear atomic response to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdcf59641a526f27c66b4ed06156465c
https://pubmed.ncbi.nlm.nih.gov/31098433
https://pubmed.ncbi.nlm.nih.gov/31098433
Publikováno v:
Physical Review X, Vol 8, Iss 2, p 021021 (2018)
We study the dynamics of a supersonically expanding ring-shaped Bose-Einstein condensate both experimentally and theoretically. The expansion redshifts long-wavelength excitations, as in an expanding universe. After expansion, energy in the radial mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b843ca26899980661f673939d8ce681
https://europepmc.org/articles/PMC6605088/
https://europepmc.org/articles/PMC6605088/
Publikováno v:
Physical Review A. 95
We study how temperature affects the lifetime of a quantized, persistent current state in a toroidal Bose-Einstein condensate (BEC). When the temperature is increased, we find a decrease in the persistent current lifetime. Comparing our measured deca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2be7843491b368de1801d17497254c7
https://doi.org/10.1103/physreva.95.021602
https://doi.org/10.1103/physreva.95.021602
Autor:
Gretchen K. Campbell, Daniel S. Barker, B. J. Reschovsky, Alessandro Restelli, Neal C. Pisenti
We present an ultra-low noise, high-voltage driver suited for use with piezoelectric actuators and other low-current applications. The architecture uses a flyback switching regulator to generate up to 250V in our current design, with an output of 1 k
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::472c8a132e3a5fb00c7e8f8945c2051c
http://arxiv.org/abs/1609.03607
http://arxiv.org/abs/1609.03607
Publikováno v:
Physical Review A. 93
An excitation scheme for transferring alkaline-earth-metal atoms from their ground state to metastable states is proposed, where the employed three-photon process is demonstrated to have transfer efficiencies as high as about 90% and can be managed t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fd4262d72a5884c36e3a69f9e75deeb
https://doi.org/10.1103/physreva.93.053417
https://doi.org/10.1103/physreva.93.053417
Autor:
Gretchen K. Campbell, Avinash Kumar, Neil Anderson, William D. Phillips, Sandro Stringari, Stephen Eckel
The Doppler effect, the shift in the frequency of sound due to motion, is present in both classical gases and quantum superfluids. Here, we perform an in situ, minimally destructive measurement, of the persistent current in a ring-shaped, superfluid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7694b54d41a8fd9579a9734c973a8214
http://iopscience.iop.org/article/10.1088/1367-2630/18/2/025001/pdf
http://iopscience.iop.org/article/10.1088/1367-2630/18/2/025001/pdf
Autor:
Jan W. Thomsen, Andrew D. Ludlow, Martin M. Boyd, Jun Ye, Gretchen K. Campbell, Sebastian Blatt, Michael J. Martin, Tanya Zelevinsky
Publikováno v:
The European Physical Journal Special Topics. 163:9-18
We describe the application of high accuracy Srspectroscopy to the measurement of the variation of thefundamental constants of nature. We first describe recent progressof the JILA Sr optical frequency standard, with a systematicuncertainty evaluation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce81b7a3fda768068664305469f7807b
https://doi.org/10.1140/epjst/e2008-00806-8
https://doi.org/10.1140/epjst/e2008-00806-8