Zobrazeno 1 - 10
of 1 835
pro vyhledávání: '"A. F. Barker"'
Autor:
A Hopper, P F Barker
Publikováno v:
New Journal of Physics, Vol 26, Iss 1, p 013015 (2024)
Near-field, radially symmetric optical potentials supported by a levitated nanosphere can be used for sympathetic cooling and for creating a bound nanosphere-atom system analogous to a large molecule. We demonstrate that the long range, Coulomb-like
Externí odkaz:
https://doaj.org/article/c834567433d74f6892bc5910d16feb09
Publikováno v:
Physical Review Research, Vol 6, Iss 1, p 013129 (2024)
Optomechanical devices are being harnessed as sensors of ultraweak forces for applications ranging from inertial sensing to the search for the elusive dark matter. For the latter, there is a focus on detection of either higher energy single recoils o
Externí odkaz:
https://doaj.org/article/b629c98a25c848e8a1a95aa5f69c8e10
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p 013013 (2023)
Cavity optomechanics offers quantum ground state cooling, control and measurement of small mechanical oscillators. However optomechanical backactions disturb the oscillator motions: they shift mechanical frequencies and, for a levitated oscillator, r
Externí odkaz:
https://doaj.org/article/898aa18570a74fd988e6271dba7cd810
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p 013070 (2023)
Levitated particles are an ideal tool for measuring weak forces and investigating quantum mechanics in macroscopic objects. Arrays of two or more of these particles have been suggested for improving force sensitivity and entangling macroscopic object
Externí odkaz:
https://doaj.org/article/d152eccd06634415b38f34802bb299bc
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p L032022 (2021)
We report on cooling of the center-of-mass motion of a nanoparticle via a coupling between its motion and the optical field within a high finesse cavity. The resulting coupling is purely quadratic in displacement and gives rise to a van der Pol nonli
Externí odkaz:
https://doaj.org/article/b6c9394eb32345ad9e9293d2f353f571
Autor:
George M. Solomon, Alan F. Barker, Elizabeth McSpiritt, Sonja Marikovics, Alexandra L. Quittner, Charles Daley, Leigh Anne Daniels, Jodie Jones, Pamela McShane, Alexandra Quittner, Kevin Winthrop, Patricia Walker, Sebastian Kurz, Louis DePalo, Charles Haworth, Richard Belkin, Charles L. Daley, Joseph Khabbaza, Elliott Dasenbrook
Publikováno v:
ATS Scholar. 4:76-86
Autor:
Laura Martinez-Gili, Julie a K McDonald, Zhigang Liu, Dina Kao, Jessica R Allegretti, Tanya M Monaghan, Grace F Barker, Jesús Miguéns Blanco, Horace R T Williams, Elaine Holmes, Mark R Thursz, Julian R Marchesi, Benjamin H Mullish
Publikováno v:
Gut Microbes, Vol 12, Iss 1 (2020)
Fecal microbiota transplant (FMT) is a highly-effective therapy for recurrent Clostridioides difficile infection (rCDI), and shows promise for certain non-CDI indications. However, at present, its mechanisms of efficacy have remained poorly understoo
Externí odkaz:
https://doaj.org/article/3f6ec94a2aec4415a86b8766d126f15a
Publikováno v:
New Journal of Physics, Vol 24, Iss 9, p 093023 (2022)
We study the role of stimulated Brillouin scattering in a fiber cavity by numerical simulations and a simple theoretical model and find good agreement between experiment, simulation and theory. We also investigate an optomechanical system based on a
Externí odkaz:
https://doaj.org/article/5380bac4fa9445edba9e92b3773693d5
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-11 (2018)
Precise gravimetric measurements are an important but challenging task. Here, Qvarfort et al. theoretically show that, in an optomechanical cavity, only the phase of the optical output needs to be measured to obtain a precise value for the gravitatio
Externí odkaz:
https://doaj.org/article/a96482065a214a149ee168e799e6a45a
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p 033218 (2021)
A nanoscale object evidenced in a nonclassical state of its center of mass will hugely extend the boundaries of quantum mechanics. To obtain a practical scheme for the same, we exploit a hitherto unexplored coupled system: an atom and a nanoparticle
Externí odkaz:
https://doaj.org/article/159ddebfd9864df6adba2007dfe2af52