Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Close, John D"'
Publikováno v:
Applied Optics 63, 31 (2024)
We present an all-digital method for stabilising the phase biases in an electro-optic I/Q modulator for carrier-suppressed single-sideband modulation. Building on the method presented in S. Wald \ea, Appl. Opt. \textbf{62}, 1-7 (2023), we use the Red
Externí odkaz:
http://arxiv.org/abs/2408.16678
Resonant frequency modulation spectroscopy has been used as a highly-sensitive method for measuring the output of cold-atom interferometers. Using a detailed model that accounts for optical saturation, spatially-varying intensities and atomic densiti
Externí odkaz:
http://arxiv.org/abs/2408.06575
Autor:
Ben-Aïcha, Yosri, Mehdi, Zain, Freier, Christian, Szigeti, Stuart S., Wigley, Paul B., Conlon, Lorcán O., Husband, Ryan, Legge, Samuel, Eagle, Rhys H., Hope, Joseph J., Robins, Nicholas P., Close, John D., Hardman, Kyle S., Haine, Simon A., Thomas, Ryan J.
We demonstrate an atom interferometer measurement protocol compatible with operation on a dynamic platform. Our method employs two open interferometers, derived from the same atomic source, with different interrogation times to eliminate initial velo
Externí odkaz:
http://arxiv.org/abs/2405.00400
Publikováno v:
Phys. Rev. Lett. 125, 100402 (2020)
We show that the inherently large interatomic interactions of a Bose-Einstein condensate (BEC) can enhance the sensitivity of a high precision cold-atom gravimeter beyond the shot-noise limit (SNL). Through detailed numerical simulation, we demonstra
Externí odkaz:
http://arxiv.org/abs/2005.00368
Autor:
Perumbil, Manju, Hardman, Kyle S, Wigley, Paul B, Close, John D, Robins, Nicholas P, Szigeti, Stuart S
Publikováno v:
Scientific Reports volume 10, Article number: 15052 (2020)
We numerically demonstrate atomic Fabry-Perot resonances for a pulsed interacting Bose-Einstein condensate (BEC) source transmitting through double Gaussian barriers. These resonances are observable for an experimentally-feasible parameter choice, wh
Externí odkaz:
http://arxiv.org/abs/2001.05206
Autor:
Hardman, Kyle S., Everitt, Patrick J., McDonald, Gordon D., Manju, Perumbil, Wigley, Paul B., Sooriyabadara, Mahasen A., Kuhn, Carlos C. N., Debs, John E., Close, John D., Robins, Nicholas P.
Publikováno v:
Phys. Rev. Lett. 117, 138501 (2016)
A Bose-Einstein condensate is used as an atomic source for a high precision sensor. A $5\times 10^6$ atom F=1 spinor condensate of $^{87}$Rb is released into free fall for up to $750$ms and probed with a Mach-Zehnder atom interferometer based on Brag
Externí odkaz:
http://arxiv.org/abs/1603.01967
Autor:
Wigley, Paul B., Everitt, Patrick J., Hardman, Kyle S., Hush, Michael R., Wei, Chunhua, Sooriyabandara, Mahasen A., Perumbil, Manju, Close, John D., Robins, Nicholas P., Kuhn, Carlos C. N.
An imaging system is presented that is capable of far-detuned non-destructive imaging of a Bose-Einstein condensate with the signal proportional to the second spatial derivative of the density. Whilst demonstrated with application to $^{85}\text{Rb}$
Externí odkaz:
http://arxiv.org/abs/1601.04425
Autor:
Everitt, Patrick J., Sooriyabandara, Mahasen A., McDonald, Gordon D., Hardman, Kyle S., Quinlivan, Ciaron, Perumbil, Manju, Wigley, Paul, Debs, John E., Close, John D., Kuhn, Carlos C. N., Robins, Nicholas P.
In weakly nonlinear dispersive systems, solitons are spatially localized solutions which propagate without changing shape through a delicate balance between dispersion and self-focusing nonlinear effects. These states have been extensively studied in
Externí odkaz:
http://arxiv.org/abs/1509.06844
Autor:
McDonald, Gordon D., Kuhn, Carlos C. N., Hardman, Kyle S., Bennetts, Shayne, Everitt, Patrick J., Altin, Paul A., Debs, John E., Close, John D., Robins, Nicholas P.
Publikováno v:
Physical Review Letters 113, 013002, 2nd July 2014
We present the first realisation of a solitonic atom interferometer. A Bose-Einstein condensate of $1\times10^4$ atoms of rubidium-85 is loaded into a horizontal optical waveguide. Through the use of a Feshbach resonance, the $s$-wave scattering leng
Externí odkaz:
http://arxiv.org/abs/1403.3485
Autor:
Hardman, Kyle S., Kuhn, Carlos C. N., McDonald, Gordon D., Debs, John E., Bennetts, Shayne, Close, John D., Robins, Nicholas P.
The role of source cloud spatial coherence in a Mach-Zehnder type atom interferometer is experimentally investigated. The visibility and contrast of a Bose-Einstein condensate (BEC) and three thermal sources with varying spatial coherence are compare
Externí odkaz:
http://arxiv.org/abs/1312.0675