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Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen

In 1906, Theodore Lyman discovered his eponymous series of transitions in the extreme-ultraviolet region of the atomic hydrogen spectrum 1$^{,}$2 . The patterns in the hydrogen spectrum helped to establish the emerging theory of quantum mechanics, which we now know governs the world at the atomic sc...

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Autores principales: Ahmadi, M, Alves, B X R, Baker, C J, Bertsche, W, Capra, A, Carruth, C, Cesar, C L, Charlton, M, Cohen, S, Collister, R, Eriksson, S, Evans, A, Evetts, N, Fajans, J, Friesen, T, Fujiwara, M C, Gill, D R, Hangst, J S, Hardy, W N, Hayden, M E, Hunter, E D, Isaac, C A, Johnson, M A, Jones, J M, Jones, S A, Jonsell, S, Khramov, A, Knapp, P, Kurchaninov, L, Madsen, N, Maxwell, D, McKenna, J T K, Menary, S, Michan, J M, Momose, T, Munich, J J, Olchanski, K, Olin, A, Pusa, P, Rasmussen, C Ø, Robicheaux, F, Sacramento, R L, Sameed, M, Sarid, E, Silveira, D M, Starko, D M, Stutter, G, So, C, Tharp, T D, Thompson, R I, van der Werf, D P, Wurtele, J S
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.1038/s41586-018-0435-1
http://cds.cern.ch/record/2667190
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author Ahmadi, M
Alves, B X R
Baker, C J
Bertsche, W
Capra, A
Carruth, C
Cesar, C L
Charlton, M
Cohen, S
Collister, R
Eriksson, S
Evans, A
Evetts, N
Fajans, J
Friesen, T
Fujiwara, M C
Gill, D R
Hangst, J S
Hardy, W N
Hayden, M E
Hunter, E D
Isaac, C A
Johnson, M A
Jones, J M
Jones, S A
Jonsell, S
Khramov, A
Knapp, P
Kurchaninov, L
Madsen, N
Maxwell, D
McKenna, J T K
Menary, S
Michan, J M
Momose, T
Munich, J J
Olchanski, K
Olin, A
Pusa, P
Rasmussen, C Ø
Robicheaux, F
Sacramento, R L
Sameed, M
Sarid, E
Silveira, D M
Starko, D M
Stutter, G
So, C
Tharp, T D
Thompson, R I
van der Werf, D P
Wurtele, J S
author_facet Ahmadi, M
Alves, B X R
Baker, C J
Bertsche, W
Capra, A
Carruth, C
Cesar, C L
Charlton, M
Cohen, S
Collister, R
Eriksson, S
Evans, A
Evetts, N
Fajans, J
Friesen, T
Fujiwara, M C
Gill, D R
Hangst, J S
Hardy, W N
Hayden, M E
Hunter, E D
Isaac, C A
Johnson, M A
Jones, J M
Jones, S A
Jonsell, S
Khramov, A
Knapp, P
Kurchaninov, L
Madsen, N
Maxwell, D
McKenna, J T K
Menary, S
Michan, J M
Momose, T
Munich, J J
Olchanski, K
Olin, A
Pusa, P
Rasmussen, C Ø
Robicheaux, F
Sacramento, R L
Sameed, M
Sarid, E
Silveira, D M
Starko, D M
Stutter, G
So, C
Tharp, T D
Thompson, R I
van der Werf, D P
Wurtele, J S
author_sort Ahmadi, M
collection CERN
description In 1906, Theodore Lyman discovered his eponymous series of transitions in the extreme-ultraviolet region of the atomic hydrogen spectrum 1$^{,}$2 . The patterns in the hydrogen spectrum helped to establish the emerging theory of quantum mechanics, which we now know governs the world at the atomic scale. Since then, studies involving the Lyman-α line—the 1S–2P transition at a wavelength of 121.6 nanometres—have played an important part in physics and astronomy, as one of the most fundamental atomic transitions in the Universe. For example, this transition has long been used by astronomers studying the intergalactic medium and testing cosmological models via the so-called ‘Lyman-α forest’ 3 of absorption lines at different redshifts. Here we report the observation of the Lyman-α transition in the antihydrogen atom, the antimatter counterpart of hydrogen. Using narrow-line-width, nanosecond-pulsed laser radiation, the 1S–2P transition was excited in magnetically trapped antihydrogen. The transition frequency at a field of 1.033 tesla was determined to be 2,466,051.7 ± 0.12 gigahertz (1σ uncertainty) and agrees with the prediction for hydrogen to a precision of 5 × 10$^{−8}$. Comparisons of the properties of antihydrogen with those of its well-studied matter equivalent allow precision tests of fundamental symmetries between matter and antimatter. Alongside the ground-state hyperfine 4$^{,}$5 and 1S–2S transitions 6$^{,}$7 recently observed in antihydrogen, the Lyman-α transition will permit laser cooling of antihydrogen 8$^{,}$9 , thus providing a cold and dense sample of anti-atoms for precision spectroscopy and gravity measurements 10 . In addition to the observation of this fundamental transition, this work represents both a decisive technological step towards laser cooling of antihydrogen, and the extension of antimatter spectroscopy to quantum states possessing orbital angular momentum.
id oai-inspirehep.net-1689438
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling oai-inspirehep.net-16894382022-06-30T11:30:30Zdoi:10.1038/s41586-018-0435-1http://cds.cern.ch/record/2667190engAhmadi, MAlves, B X RBaker, C JBertsche, WCapra, ACarruth, CCesar, C LCharlton, MCohen, SCollister, REriksson, SEvans, AEvetts, NFajans, JFriesen, TFujiwara, M CGill, D RHangst, J SHardy, W NHayden, M EHunter, E DIsaac, C AJohnson, M AJones, J MJones, S AJonsell, SKhramov, AKnapp, PKurchaninov, LMadsen, NMaxwell, DMcKenna, J T KMenary, SMichan, J MMomose, TMunich, J JOlchanski, KOlin, APusa, PRasmussen, C ØRobicheaux, FSacramento, R LSameed, MSarid, ESilveira, D MStarko, D MStutter, GSo, CTharp, T DThompson, R Ivan der Werf, D PWurtele, J SObservation of the 1S–2P Lyman-$\alpha$ transition in antihydrogenPhysics in GeneralPhysics in GeneralIn 1906, Theodore Lyman discovered his eponymous series of transitions in the extreme-ultraviolet region of the atomic hydrogen spectrum 1$^{,}$2 . The patterns in the hydrogen spectrum helped to establish the emerging theory of quantum mechanics, which we now know governs the world at the atomic scale. Since then, studies involving the Lyman-α line—the 1S–2P transition at a wavelength of 121.6 nanometres—have played an important part in physics and astronomy, as one of the most fundamental atomic transitions in the Universe. For example, this transition has long been used by astronomers studying the intergalactic medium and testing cosmological models via the so-called ‘Lyman-α forest’ 3 of absorption lines at different redshifts. Here we report the observation of the Lyman-α transition in the antihydrogen atom, the antimatter counterpart of hydrogen. Using narrow-line-width, nanosecond-pulsed laser radiation, the 1S–2P transition was excited in magnetically trapped antihydrogen. The transition frequency at a field of 1.033 tesla was determined to be 2,466,051.7 ± 0.12 gigahertz (1σ uncertainty) and agrees with the prediction for hydrogen to a precision of 5 × 10$^{−8}$. Comparisons of the properties of antihydrogen with those of its well-studied matter equivalent allow precision tests of fundamental symmetries between matter and antimatter. Alongside the ground-state hyperfine 4$^{,}$5 and 1S–2S transitions 6$^{,}$7 recently observed in antihydrogen, the Lyman-α transition will permit laser cooling of antihydrogen 8$^{,}$9 , thus providing a cold and dense sample of anti-atoms for precision spectroscopy and gravity measurements 10 . In addition to the observation of this fundamental transition, this work represents both a decisive technological step towards laser cooling of antihydrogen, and the extension of antimatter spectroscopy to quantum states possessing orbital angular momentum.In 1906, Theodore Lyman discovered his eponymous series of transitions in the extreme-ultraviolet region of the atomic hydrogen spectrum1,2. The patterns in the hydrogen spectrum helped to establish the emerging theory of quantum mechanics, which we now know governs the world at the atomic scale. Since then, studies involving the Lyman-α line—the 1S–2P transition at a wavelength of 121.6 nanometres—have played an important part in physics and astronomy, as one of the most fundamental atomic transitions in the Universe. For example, this transition has long been used by astronomers studying the intergalactic medium and testing cosmological models via the so-called ‘Lyman-α forest’3 of absorption lines at different redshifts. Here we report the observation of the Lyman-α transition in the antihydrogen atom, the antimatter counterpart of hydrogen. Using narrow-line-width, nanosecond-pulsed laser radiation, the 1S–2P transition was excited in magnetically trapped antihydrogen. The transition frequency at a field of 1.033 tesla was determined to be 2,466,051.7 ± 0.12 gigahertz (1σ uncertainty) and agrees with the prediction for hydrogen to a precision of 5 × 10−8. Comparisons of the properties of antihydrogen with those of its well-studied matter equivalent allow precision tests of fundamental symmetries between matter and antimatter. Alongside the ground-state hyperfine4,5 and 1S–2S transitions6,7 recently observed in antihydrogen, the Lyman-α transition will permit laser cooling of antihydrogen8,9, thus providing a cold and dense sample of anti-atoms for precision spectroscopy and gravity measurements10. In addition to the observation of this fundamental transition, this work represents both a decisive technological step towards laser cooling of antihydrogen, and the extension of antimatter spectroscopy to quantum states possessing orbital angular momentum.oai:inspirehep.net:16894382018
spellingShingle Physics in General
Physics in General
Ahmadi, M
Alves, B X R
Baker, C J
Bertsche, W
Capra, A
Carruth, C
Cesar, C L
Charlton, M
Cohen, S
Collister, R
Eriksson, S
Evans, A
Evetts, N
Fajans, J
Friesen, T
Fujiwara, M C
Gill, D R
Hangst, J S
Hardy, W N
Hayden, M E
Hunter, E D
Isaac, C A
Johnson, M A
Jones, J M
Jones, S A
Jonsell, S
Khramov, A
Knapp, P
Kurchaninov, L
Madsen, N
Maxwell, D
McKenna, J T K
Menary, S
Michan, J M
Momose, T
Munich, J J
Olchanski, K
Olin, A
Pusa, P
Rasmussen, C Ø
Robicheaux, F
Sacramento, R L
Sameed, M
Sarid, E
Silveira, D M
Starko, D M
Stutter, G
So, C
Tharp, T D
Thompson, R I
van der Werf, D P
Wurtele, J S
Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen
title Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen
title_full Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen
title_fullStr Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen
title_full_unstemmed Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen
title_short Observation of the 1S–2P Lyman-$\alpha$ transition in antihydrogen
title_sort observation of the 1s–2p lyman-$\alpha$ transition in antihydrogen
topic Physics in General
Physics in General
url https://dx.doi.org/10.1038/s41586-018-0435-1
http://cds.cern.ch/record/2667190
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