dc.identifier.uri |
http://dx.doi.org/10.15488/2026 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/2051 |
|
dc.contributor.author |
Kruse, I.
|
|
dc.contributor.author |
Lange, K.
|
|
dc.contributor.author |
Peise, J.
|
|
dc.contributor.author |
Lücke, Bernd
|
|
dc.contributor.author |
Pezzè, L.
|
|
dc.contributor.author |
Arlt, Jan J.
|
|
dc.contributor.author |
Ertmer, Wolfgang
|
|
dc.contributor.author |
Lisdat, C.
|
|
dc.contributor.author |
Santos, Luis
|
|
dc.contributor.author |
Smerzi, A.
|
|
dc.contributor.author |
Klempt, Carsten
|
|
dc.contributor.editor |
Shahriar, Selim M.
|
|
dc.contributor.editor |
Scheuer, Jacob
|
|
dc.date.accessioned |
2017-10-12T08:42:41Z |
|
dc.date.available |
2017-10-12T08:42:41Z |
|
dc.date.issued |
2017 |
|
dc.identifier.citation |
Kruse, I.; Lange, K.; Peise, J.; Lücke, B.; Pezzè, L. et al.: 0.75 atoms improve the clock signal of 10,000 atoms. In: Proceedings of SPIE - The International Society for Optical Engineering 10119 (2017), 101190D. DOI: https://doi.org/10.1117/12.2250786 |
|
dc.description.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. © 2017 SPIE. |
eng |
dc.language.iso |
eng |
|
dc.publisher |
Bellingham, WA : S P I E - International Society for Optical Engineering |
|
dc.relation.ispartof |
Slow Light, Fast Light, and Opto-Atomic Precision Metrology X : 30 January-2 February 2017, San Francisco, California, United States |
|
dc.relation.ispartofseries |
Proceedings of SPIE 10119 (2017) |
|
dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich. |
|
dc.subject |
Atomic clock |
eng |
dc.subject |
Precision below the SQL |
eng |
dc.subject |
Squeezed vacuum |
eng |
dc.subject |
Atomic clocks |
eng |
dc.subject |
Fountains |
eng |
dc.subject |
Interferometers |
eng |
dc.subject |
Units of measurement |
eng |
dc.subject |
Atom interferometer |
eng |
dc.subject |
Clock signal |
eng |
dc.subject |
Precision below the SQL |
eng |
dc.subject |
Precision metrology |
eng |
dc.subject |
Squeezed vacuum |
eng |
dc.subject |
Squeezed vacuum state |
eng |
dc.subject |
Standard quantum limits |
eng |
dc.subject |
Technical limitations |
eng |
dc.subject |
Slow light |
eng |
dc.subject.classification |
Konferenzschrift |
ger |
dc.subject.ddc |
530 | Physik
|
ger |
dc.title |
0.75 atoms improve the clock signal of 10,000 atoms |
eng |
dc.type |
BookPart |
|
dc.type |
Text |
|
dc.relation.essn |
1996-756X |
|
dc.relation.isbn |
978-1-5106-0679-1 |
|
dc.relation.issn |
0277-786X |
|
dc.relation.doi |
https://doi.org/10.1117/12.2250786 |
|
dc.bibliographicCitation.volume |
10119 |
|
dc.bibliographicCitation.firstPage |
101190D |
|
dc.description.version |
publishedVersion |
|
tib.accessRights |
frei zug�nglich |
|