dorsal/arxiv
View SchemaA new photon recoil experiment: towards a determination of the fine structure constant
| Authors | Holger Mueller, Sheng-wey Chiow, Quan Long, Christoph Vo, Steven Chu |
|---|---|
| Categories | |
| ArXiv ID | physics/0605125 |
| URL | https://arxiv.org/abs/physics/0605125 |
| DOI | 10.1007/s00340-006-2279-x |
| Journal | Appl. Phys. B 84, 633--642 (2006) |
Abstract
We report on progress towards a measurement of the fine structure constant to an accuracy of $5\times 10^{-10}$ or better by measuring the ratio of the Planck constant to the mass of the cesium atom. Compared to similar experiments, ours is improved in three significant ways: (i) simultaneous conjugate interferometers, (ii) multi-photon Bragg diffraction between same internal states, and (iii) an about 1000 fold reduction of laser phase noise to -138 dBc/Hz. Combining that with a new method to simultaneously stabilize the phases of four frequencies, we achieve 0.2 mrad effective phase noise at the location of the atoms. In addition, we use active stabilization to suppress systematic effects due to beam misalignment.
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"abstract": "We report on progress towards a measurement of the fine structure constant to\nan accuracy of $5\\times 10^{-10}$ or better by measuring the ratio of the\nPlanck constant to the mass of the cesium atom. Compared to similar\nexperiments, ours is improved in three significant ways: (i) simultaneous\nconjugate interferometers, (ii) multi-photon Bragg diffraction between same\ninternal states, and (iii) an about 1000 fold reduction of laser phase noise to\n-138 dBc/Hz. Combining that with a new method to simultaneously stabilize the\nphases of four frequencies, we achieve 0.2 mrad effective phase noise at the\nlocation of the atoms. In addition, we use active stabilization to suppress\nsystematic effects due to beam misalignment.",
"arxiv_id": "physics/0605125",
"authors": [
"Holger Mueller",
"Sheng-wey Chiow",
"Quan Long",
"Christoph Vo",
"Steven Chu"
],
"categories": [
"physics.atom-ph",
"physics.optics",
"physics.space-ph"
],
"doi": "10.1007/s00340-006-2279-x",
"journal_ref": "Appl. Phys. B 84, 633--642 (2006)",
"title": "A new photon recoil experiment: towards a determination of the fine structure constant",
"url": "https://arxiv.org/abs/physics/0605125"
},
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