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Matterwave interferometry beyond classical limits Synthetic Quantum Systems / Kirchhoff Institut für Physik / Heidelberg University www.matterwave.de.

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Presentation on theme: "Matterwave interferometry beyond classical limits Synthetic Quantum Systems / Kirchhoff Institut für Physik / Heidelberg University www.matterwave.de."— Presentation transcript:

1 Matterwave interferometry beyond classical limits Synthetic Quantum Systems / Kirchhoff Institut für Physik / Heidelberg University

2 How does an apple drop? Precision limits: size of apple Precision of the ruler Precision of time Synthetic Quantum Systems / Markus Oberthaler

3 apple atom precision limit: size of the apple precision limit: size of the atom? How does an apple drop? Synthetic Quantum Systems / Markus Oberthaler

4 quantum mechanics 1924 De Broglie a particle h = Js m = kg wavelength is smaller than the atom size ! Synthetic Quantum Systems / Markus Oberthaler

5 quantum mechanics interference smaller than the size of the atom wavelength Synthetic Quantum Systems / Markus Oberthaler

6 quantum mechanics interference position probability Synthetic Quantum Systems / Markus Oberthaler

7 Steven Chu/Nobel Preis 1997 quantum mechanics interference – classical limit g

8 Verlust von Kontrolle: Zitat Einstein : Gott würfelt nicht! Wie kann man mit einer Beschreibung die nur alles scheints zufällig macht etwas verbessern h= Js Steven Chu/Nobel Preis 1997 Quantum mechanics Interference – classical limit why is this point not on the line? number of atoms

9 position probability quantum mechanics interference – classical limit position is only know within an uncertainty, due to final number of particles statistics N Synthetic Quantum Systems / Markus Oberthaler classical precision limit

10 Bose Einstein condensation Many particle quantum physics Cornell Ketterle Wieman Nobel price °K °K °K atoms are like apples/balls wave nature becomes important all atoms are in lock step Synthetic Quantum Systems / Markus Oberthaler

11 surface of the sun room temperature liquid Helium laser cooling Doppler limit recoil limit temperature [K] Bose Einstein condensation the experimental steps

12 surface of the sun room temperature liquid Helium laser cooling Doppler limit recoil limit temperature [K] Cornell, Ketterle, Wieman Nobel price 2001 Bethe Nobel price 1967 William F. Giauque Nobel price 1949 Lee,Osherov, Richardson Nobel price 1996 Chu,Cohen-Tannoudji, Phillips Nobel price 1997 Kamerlingh Onnes Nobel price 1913 Abrikosov, Ginzburg, Leggett Nobel price 2003 Kapitsa, Penzias, Wilson Nobel price 1978 Bednorz,Müller Nobel price 1987 temperature scale or....

13 in real life ? combine low with high-tech µ Synthetic Quantum Systems / Markus Oberthaler

14 many particle interference overlapping condensates Synthetic Quantum Systems / Markus Oberthaler

15 many independent particles what is different to Chus experiment Synthetic Quantum Systems / Markus Oberthaler

16 precision is gained by repetition what do many experiments give N Synthetic Quantum Systems / Markus Oberthaler

17 T=0 N condensed particles is different to N independent particles Synthetic Quantum Systems / Markus Oberthaler

18 fluctuations of particle number squeezed matterwaves statistics Synthetic Quantum Systems / Markus Oberthaler

19 fluctuations of particle number squeezed matterwaves position propability Mach-Zehnder interferometer Synthetic Quantum Systems / Markus Oberthaler

20 fluctuations of particle number squeezed matterwaves position propability Mach-Zehnder interferometer Synthetic Quantum Systems / Markus Oberthaler

21 precision beyond the classical limit many particle quantum physics Synthetic Quantum Systems / Markus Oberthaler

22 quantum metrology sensors beyond tomorrow 1 minute witin the age of the universe classical precision limit Nature 455, 1216 (2008) Nature 464, 1165 (2010) Synthetic Quantum Systems / Markus Oberthaler


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