Details
| Originalsprache | Englisch |
|---|---|
| Herausgeber (Verlag) | SPIE |
| Publikationsstatus | Veröffentlicht - 20 Feb. 2017 |
| Veranstaltung | Slow Light, Fast Light, and Opto-Atomic Precision Metrology X 2017 - San Francisco, USA / Vereinigte Staaten Dauer: 30 Jan. 2017 → 2 Feb. 2017 |
Abstract
Since the pioneering work of Ramsey, atom interferometers are employed for precision metrology, in particular to measure time and to realize the second. In a classical interferometer, an ensemble of atoms is prepared in one of the two input states, whereas the second one is left empty. In this case, the vacuum noise restricts the precision of the interferometer to the standard quantum limit (SQL). Here, we propose and experimentally demonstrate a novel clock configuration that surpasses the SQL by squeezing the vacuum in the empty input state. We create a squeezed vacuum state containing an average of 0.75 atoms to improve the clock sensitivity of 10,000 atoms by 2.05 -.37 +.34 dB. The SQL poses a significant limitation for today's microwave fountain clocks, which serve as the main time reference. We evaluate the major technical limitations and challenges for devising a next generation of fountain clocks based on atomic squeezed vacuum.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Mathematik (insg.)
- Angewandte Mathematik
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
- Informatik (insg.)
- Angewandte Informatik
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Publikation: Nicht-textuelle Medien › Audiovisuelle Veröffentlichung › Forschung › Peer-Review
}
TY - ADVS
T1 - 0.75 atoms improve the clock signal of 10,000 atoms
AU - Kruse, Ilka
AU - Lange, Karsten
AU - Peise, Jan
AU - Lücke, Bernd
AU - Pezzè, Luca
AU - Arlt, J.
AU - Ertmer, Wolfgang
AU - Lisdat, Christian
AU - Santos, Luis Sanchez
AU - Smerzi, Augusto
AU - Klempt, Carsten
N1 - Publisher Copyright: © 2017 SPIE. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/2/20
Y1 - 2017/2/20
N2 - Since the pioneering work of Ramsey, atom interferometers are employed for precision metrology, in particular to measure time and to realize the second. In a classical interferometer, an ensemble of atoms is prepared in one of the two input states, whereas the second one is left empty. In this case, the vacuum noise restricts the precision of the interferometer to the standard quantum limit (SQL). Here, we propose and experimentally demonstrate a novel clock configuration that surpasses the SQL by squeezing the vacuum in the empty input state. We create a squeezed vacuum state containing an average of 0.75 atoms to improve the clock sensitivity of 10,000 atoms by 2.05 -.37 +.34 dB. The SQL poses a significant limitation for today's microwave fountain clocks, which serve as the main time reference. We evaluate the major technical limitations and challenges for devising a next generation of fountain clocks based on atomic squeezed vacuum.
AB - Since the pioneering work of Ramsey, atom interferometers are employed for precision metrology, in particular to measure time and to realize the second. In a classical interferometer, an ensemble of atoms is prepared in one of the two input states, whereas the second one is left empty. In this case, the vacuum noise restricts the precision of the interferometer to the standard quantum limit (SQL). Here, we propose and experimentally demonstrate a novel clock configuration that surpasses the SQL by squeezing the vacuum in the empty input state. We create a squeezed vacuum state containing an average of 0.75 atoms to improve the clock sensitivity of 10,000 atoms by 2.05 -.37 +.34 dB. The SQL poses a significant limitation for today's microwave fountain clocks, which serve as the main time reference. We evaluate the major technical limitations and challenges for devising a next generation of fountain clocks based on atomic squeezed vacuum.
KW - Atomic clock
KW - Precision below the SQL
KW - Squeezed vacuum
UR - http://www.scopus.com/inward/record.url?scp=85020491746&partnerID=8YFLogxK
U2 - 10.1117/12.2250786
DO - 10.1117/12.2250786
M3 - Audiovisual publication
PB - SPIE
T2 - Slow Light, Fast Light, and Opto-Atomic Precision Metrology X 2017
Y2 - 30 January 2017 through 2 February 2017
ER -