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Loriani S, Friedrich A, Ufrecht C, Di Pumpo F, Kleinert S, Abend S, Gaaloul N, Meiners C, Schubert C, Tell D, Wodey É, Zych M, Ertmer W, Roura A, Schlippert D, Schleich WP, Rasel EM, Giese E. Interference of clocks: A quantum twin paradox. Sci Adv 2019; 5:eaax8966. [PMID: 31620559 PMCID: PMC6777965 DOI: 10.1126/sciadv.aax8966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
The phase of matter waves depends on proper time and is therefore susceptible to special-relativistic (kinematic) and gravitational (redshift) time dilation. Hence, it is conceivable that atom interferometers measure general-relativistic time-dilation effects. In contrast to this intuition, we show that (i) closed light-pulse interferometers without clock transitions during the pulse sequence are not sensitive to gravitational time dilation in a linear potential. (ii) They can constitute a quantum version of the special-relativistic twin paradox. (iii) Our proposed experimental geometry for a quantum-clock interferometer isolates this effect.
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Affiliation(s)
- Sina Loriani
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Alexander Friedrich
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
| | - Christian Ufrecht
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
| | - Fabio Di Pumpo
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
| | - Stephan Kleinert
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
| | - Sven Abend
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Naceur Gaaloul
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Christian Meiners
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Christian Schubert
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Dorothee Tell
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Étienne Wodey
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Magdalena Zych
- Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Wolfgang Ertmer
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Albert Roura
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
| | - Dennis Schlippert
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Wolfgang P. Schleich
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
- Hagler Institute for Advanced Study and Department of Physics and Astronomy, Institute for Quantum Science and Engineering (IQSE), Texas A&M AgriLife Research, Texas A&M University, College Station, TX 77843-4242, USA
- Institute of Quantum Technologies, German Aerospace Center (DLR), D-89069 Ulm, Germany
| | - Ernst M. Rasel
- Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Enno Giese
- Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
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Meiners C, Loesken S, Doehring S, Starick E, Pesch S, Maas A, Noe T, Beer M, Harder T, Grosse Beilage E. Field study on swine influenza virus (SIV) infection in weaner pigs and sows. Tierarztl Prax Ausg G Grosstiere Nutztiere 2014; 42:351-9. [PMID: 25405955 DOI: 10.15653/tpg-131130] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 08/08/2014] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aim of this field study was to explore the occurrence of and factors associated with the detection of swine influenza virus (SIV) by RTqPCR in weaner pigs and sows from herds with a history of respiratory or reproductive disorders. MATERIAL AND METHODS The sample set was based on nasal swabs from 823 sows (123 submissions) and 562 weaner pigs (80 submissions). Nasal swab samples were taken and submitted by 51 veterinary practices from all over Germany. Corresponding to the pig density most of the submissions originated from the north-western part of Germany. The nasal swabs were used to detect SIV RNA by real-time RT-PCR (RTqPCR). Subtyping of SIV RNA by conventional RT-PCR and sequencing was attempted directly from clinical samples or from isolates when available. The herd characteristics, management and housing conditions of the pig herd as well as the course of the disease were collected by a telephone questionnaire with the herd attending veterinarian. RESULTS SIV was detected by RTqPCR in 53.8% of the submissions from weaner pigs with a history of respiratory disease. Moreover SIV was detected in 10.6% of the submissions from sows. The predominant endemic subtype found in nasal swabs from sows and weaner pigs was H1N1 (60.5%) whereas subtypes H1N2 (14.0%) and H3N2 (14.0%) were detected less frequently. In addition, human pandemic H1N1 virus or reassortants thereof were found in 11.5%. CONCLUSION AND CLINICAL RELEVANCE The results underline the significance of a SIV infection in young pigs. A significant lower detection of SIV in wea- ner pigs was associated with the vaccination of piglets against por- cine circovirus type 2 (PCV2), possibly indicating an interaction of SIV and PCV2. Most of the positive samples from sows originated from gilts, whereas only two originated from sows. An association between reproductive disorders and the detection of SIV could not be confirmed.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - E Grosse Beilage
- Prof. Dr. Elisabeth grosse Beilage, University of Veterinary Medicine Hannover, Field Station for Epidemiology, Buescheler Strasse 9, 49456 Bakum, Germany,
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De Feyter S, Gesquière A, Abdel-Mottaleb MM, Grim PC, De Schryver FC, Meiners C, Sieffert M, Valiyaveettil S, Müllen K. Scanning tunneling microscopy: a unique tool in the study of chirality, dynamics, and reactivity in physisorbed organic monolayers. Acc Chem Res 2000; 33:520-31. [PMID: 10955982 DOI: 10.1021/ar970040g] [Citation(s) in RCA: 168] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Scanning tunneling microscopy (STM) is applied to study organic monolayers, physisorbed at the liquid-graphite interface. Due to the very local nature of the probing, the structure of these adlayers has been imaged with very high detail. The high resolution allowed us to investigate the effect of molecular chirality on the monolayer formation and provided a unique way to study chemical reactions at the liquid-graphite interface. Making use of a fast scanning mode, dynamic processes in these adlayers have been visualized.
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Affiliation(s)
- S De Feyter
- Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
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