Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Bharath Srivathsan"'
Autor:
Bharath Srivathsan, Martin Fischer, Lucas Alber, Markus Weber, Markus Sondermann, Gerd Leuchs
Publikováno v:
New Journal of Physics, Vol 21, Iss 11, p 113014 (2019)
We present a technique based on high resolution imaging to measure the absolute temperature and the heating rate of a single ion trapped at the focus of a deep parabolic mirror. We collect the fluorescence light scattered by the ion during laser cool
Externí odkaz:
https://doaj.org/article/da725052fd1448dfba3ac475f7bac5f4
Publikováno v:
New Journal of Physics, Vol 17, Iss 9, p 093034 (2015)
We characterize correlations in polarization and time of photon pairs generated from a cold cloud of ^87 Rb atoms via a four-wave mixing process in a cascade level scheme. Quantum state tomography reveals entangled polarization states of high purity
Externí odkaz:
https://doaj.org/article/6b0901a70f614fdeaec855373be39f42
Autor:
Martin Fischer, Gerd Leuchs, Markus Sondermann, Lucas Alber, Markus Weber, Bharath Srivathsan
Publikováno v:
Exploring the World with the Laser ISBN: 9783319643458
We discuss and measure the phase shift imposed onto a radially polarized light beam when focusing it onto an \( {}^{174}{\mathrm{Yb}}^{+} \) ion. In the derivation of the expected phase shifts, we include the properties of the involved atomic levels.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c555c76402ed77fca8ebc92509c3ee0
https://doi.org/10.1007/978-3-319-64346-5_22
https://doi.org/10.1007/978-3-319-64346-5_22
We characterize a source of photon pairs based on cascade decay in a cold Rb-87 ensemble. This source is particularly suited to generate of photons for interaction with Rb-87 based atomic systems. We experimentally investigate the dependence of pair
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2db4aba56c404d7af4ff1883e9457491
Autor:
Christian Kurtsiefer, Victor Leong, Bharath Srivathsan, Mathias Alexander Seidler, Matthias Steiner, Alessandro Cerè, Gurpreet Kaur Gulati
Publikováno v:
Quantum Photonic Devices.
We prepare single photons with a temporal envelope with rising exponential shape, resembling the time-reversed version of photons from the spontaneous decay process using a parametric conversion process in a cold atomic vapor. The mechanism is based
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7df4f95c44bf2fa33209052025f482c5
https://doi.org/10.1117/12.2278703
https://doi.org/10.1117/12.2278703
Autor:
Martin Fischer, Markus Sondermann, Lucas Alber, Markus Weber, Bharath Srivathsan, Gerd Leuchs
Publikováno v:
Applied Physics B. 123
We discuss and measure the phase shift imposed onto a radially polarized light beam when focusing it onto an $^{174}\text{Yb}^{+}$ ion. In the derivation of the expected phase shifts we include the properties of the involved atomic levels. Furthermor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db12bb9ba51b7a553997afff00ba29e8
https://doi.org/10.1007/s00340-016-6609-3
https://doi.org/10.1007/s00340-016-6609-3
Autor:
Alessandro Cerè, Victor Leong, Bharath Srivathsan, Gurpreet Kaur Gulati, Christian Kurtsiefer, Sandoko Kosen
Publikováno v:
SPIE Proceedings.
Hong-Ou-Mandel interference between independent sources is a fundamental primitive of many quantum communication and computation protocols. We present a study of the Hong-Ou-Mandel interference of single photons generated via two different physical p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59aaea76b40a12c6fa09cc656f264a6d
https://doi.org/10.1117/12.2196246
https://doi.org/10.1117/12.2196246
Autor:
Alessandro Cerè, Gurpreet Kaur Gulati, Sandoko Kosen, Victor Leong, Bharath Srivathsan, Christian Kurtsiefer
Publikováno v:
Physical Review A. 91
We present Hong-Ou-Mandel interference of single photons generated via two different physical processes by two independent atomic systems: scattering by a single atom, and parametric generation via four-wave mixing in a cloud of cold atoms. Without a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c07c4c9b54351d85ab63f803989f38a9
https://doi.org/10.1103/physreva.91.063829
https://doi.org/10.1103/physreva.91.063829
We characterize correlations in polarization and time of photon pairs generated from a cold cloud of Rb-87 atoms via a four-wave mixing process in a cascade level scheme. Quantum state tomography reveals entangled polarization states of high purity f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f46d7c2413e72dc13293774198fe456b
http://arxiv.org/abs/1505.05606
http://arxiv.org/abs/1505.05606
Autor:
Bharath Srivathsan, Alessandro Cerè, Brenda Chng, Gurpreet Kaur Gulati, Dzmitry Matsukevich, Christian Kurtsiefer
Publikováno v:
Physical Review A. 90
We prepare heralded single photons from a photon pair source based on non-degenerate four-wave mixing in a cold atomic ensemble via a cascade decay scheme. Their statistics shows strong antibunching with g(2)(0) < 0.03, indicating a near single photo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1f70e5c4fa8d28cdd056e14bbe49a1f
https://doi.org/10.1103/physreva.90.033819
https://doi.org/10.1103/physreva.90.033819