Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Overstreet, Chris"'
We analyze the sensitivity of a laboratory-scale ytterbium atom interferometer to scalar, vector, and axion dark matter signals. A frequency ratio measurement between two transitions in $^{171}$Yb enables a search for variations of the fine-structure
Externí odkaz:
http://arxiv.org/abs/2406.00716
Publikováno v:
Phys. Scr. 99 046103 (2024)
In a uniform gravitational field, classical test objects fall universally. Any reference object or observer will fall in the same universal manner. Therefore, a uniform gravitational field cannot create dynamics between observers and classical test o
Externí odkaz:
http://arxiv.org/abs/2404.03057
Autor:
Overstreet, Chris, Curti, Joseph, Kim, Minjeong, Asenbaum, Peter, Kasevich, Mark A., Giacomini, Flaminia
Publikováno v:
Phys. Rev. D 108, 084038 (2023)
Experiments are beginning to probe the interaction of quantum particles with gravitational fields beyond the uniform-field regime. In non-relativistic quantum mechanics, the gravitational field in such experiments can be written as a superposition st
Externí odkaz:
http://arxiv.org/abs/2209.02214
Publikováno v:
American Journal of Physics 89, 324 (2021)
Many different formalisms exist for computing the phase of a matter-wave interferometer. However, it can be challenging to develop physical intuition about what a particular interferometer is actually measuring or about whether a given classical meas
Externí odkaz:
http://arxiv.org/abs/2008.05609
Autor:
Kim, Minjeong, Notermans, Remy, Overstreet, Chris, Curti, Joseph, Asenbaum, Peter, Kasevich, Mark A.
Publikováno v:
Opt. Lett. 45, 6555-6558 (2020)
We demonstrate a narrow-linewidth 780 nm laser system with up to 40 W power and a frequency modulation bandwidth of 230 MHz. Efficient overlap on nonlinear optical elements combines two pairs of phase-locked frequency components into a single beam. S
Externí odkaz:
http://arxiv.org/abs/2008.01104
Publikováno v:
Phys. Rev. Lett. 125, 191101 (2020)
Does gravity influence local measurements? We use a dual-species atom interferometer with $2\,\text{s}$ of free-fall time to measure the relative acceleration between $^{85}$Rb and $^{87}$Rb wave packets in the Earth's gravitational field. Systematic
Externí odkaz:
http://arxiv.org/abs/2005.11624
Autor:
Overstreet, Chris, Asenbaum, Peter, Kovachy, Tim, Notermans, Remy, Hogan, Jason M., Kasevich, Mark A.
Publikováno v:
Phys. Rev. Lett. 120, 183604 (2018)
In an ideal test of the equivalence principle, the test masses fall in a common inertial frame. A real experiment is affected by gravity gradients, which introduce systematic errors by coupling to initial kinematic differences between the test masses
Externí odkaz:
http://arxiv.org/abs/1711.09986
Autor:
Asenbaum, Peter, Overstreet, Chris, Kovachy, Tim, Brown, Daniel D., Hogan, Jason M., Kasevich, Mark A.
Publikováno v:
Phys. Rev. Lett. 118, 183602 (2017)
We present a single-source dual atom interferometer and utilize it as a gradiometer for precise gravitational measurements. The macroscopic separation between interfering atomic wave packets (as large as 16 cm) reveals the interplay of recoil effects
Externí odkaz:
http://arxiv.org/abs/1610.03832
Autor:
Kovachy, Tim, Hogan, Jason M., Sugarbaker, Alex, Dickerson, Susannah M., Donnelly, Christine A., Overstreet, Chris, Kasevich, Mark A.
Publikováno v:
Phys. Rev. Lett. 114, 143004 (2015)
Using a matter wave lens and a long time-of-flight, we cool an ensemble of Rb-87 atoms in two dimensions to an effective temperature of less than $50^{+50}_{-30}$~pK. A short pulse of red-detuned light generates an optical dipole force that collimate
Externí odkaz:
http://arxiv.org/abs/1407.6995