Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Kwong, Chang Chi"'
Ramsey interferometry is a key technique for precision spectroscopy and to probe the coherence of quantum systems. Typically, an interferometer is constructed using two quantum states and involves a time-dependent interaction with two short resonant
Externí odkaz:
http://arxiv.org/abs/2309.10192
Publikováno v:
Quantum Electron. 52 532 (2022)
We detail the cooling mechanisms of a Fermionic strontium-87 gas in order to study its evolution under a non-Abelian gauge field. In contrast to our previous work reported in Ref. [1], we emphasize here on the finite temperature effect of the gas. In
Externí odkaz:
http://arxiv.org/abs/2209.10669
Autor:
Li, Jianing, Lim, Kelvin, Das, Swarup, Zanon-Willette, Thomas, Feng, Chen-Hao, Robert, Paul, Bertoldi, Andrea, Bouyer, Philippe, Kwong, Chang Chi, Lan, Shau-Yu, Wilkowski, David
Publikováno v:
AVS Quantum Sci. 4, 046801 (2022)
Transversely loaded bidimensional-magneto-optical-traps (2D-MOT) have been recently developed as high flux sources for cold strontium atoms to realize a new generation of compact experimental setups. Here, we discuss on the implementation of a cross-
Externí odkaz:
http://arxiv.org/abs/2209.08479
Publikováno v:
Physical Review Research, 4, 033180, 2022
Spin-dependent electrical injection has found useful applications in storage devices, but fully operational spin-dependent semiconductor electronics remain a challenging task because of weak spin-orbit couplings and/or strong spin relaxations. These
Externí odkaz:
http://arxiv.org/abs/2203.13360
Autor:
Hasan, Mehedi, Madasu, Chetan Sriram, Rathod, Ketan D., Kwong, Chang Chi, Miniatura, Christian, Chevy, Frederic, Wilkowski, David
Publikováno v:
Phys. Rev. Lett. 129, 130402 (2022)
It is generally admitted that in quantum mechanics, the electromagnetic potentials have physical interpretations otherwise absent in classical physics as illustrated by the Aharonov-Bohm effect. In 1984, Berry interpreted this effect as a geometrical
Externí odkaz:
http://arxiv.org/abs/2201.00885
Publikováno v:
Scientific Reports 12, 868 (2022)
We demonstrate a simple and compact approach to laser cool and trap atoms based on laser-induced thermal ablation (LITA) of a pure solid granule. A rapid thermalisation of the granule leads to a fast recovery of the ultra-high vacuum condition requir
Externí odkaz:
http://arxiv.org/abs/2109.13071
Focusing on the transient regime, we explore atomic two-photon spectroscopy with self-aligned homodyne interferometry in a $\Lambda$-system with large optical depth. The two light sources at the origin of the interference are the single-photon transi
Externí odkaz:
http://arxiv.org/abs/2105.12440
Autor:
Mancois, Vincent, Barré, Julien, Kwong, Chang Chi, Olivetti, Alain, Viot, Pascal, Wilkowski, David
Publikováno v:
Phys. Rev. A. 52 003300 (2020)
In two dimensions, a system of self-gravitating particles collapses and forms a singularity in finite time below a critical temperature $T_c$. We investigate experimentally a quasi two-dimensional cloud of cold neutral atoms in interaction with two p
Externí odkaz:
http://arxiv.org/abs/2006.14848
Autor:
Kwong, Chang Chi, Chan, Eng Aik, Aljunid, Syed Abdullah, Shakhmuratov, Rustem, Wilkowski, David
Publikováno v:
Opt. Express 27, 32323-32336 (2019)
Band-resolved frequency modulation spectroscopy is a common method to measure weak signals of radiative ensembles. When the optical depth of the medium is large, the signal drops exponentially and the technique becomes ineffective. In this situation,
Externí odkaz:
http://arxiv.org/abs/1902.06926
Publikováno v:
Phys. Rev. A 99, 043806 (2019)
We calculate the relative permittivity of a cold atomic gas under weak probe illumination, up to second order in the density. Within the framework of a diagrammatic representation method, we identify all the second order diagrams that enter into the
Externí odkaz:
http://arxiv.org/abs/1811.10516