maykel l. gonzález-martínez challenges @ ultracold temperatures [email protected]...
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Maykel L. González-Martínez
Challenges @ ultracold temperatures
[email protected] October 3th, 2013. Bordeaux
October 3th, 2013. Bordeaux
Why?
October 3th, 2013. Bordeaux
... it's not about the money
October 3th, 2013. Bordeaux
(the) science is
cool!
G Quéméner and PS Julienne Chem. Rev. 112, 4949 (2012) October 3th, 2013. Bordeaux
... fairly cold
http://cua.mit.edu/ketterle_group/experimental_setup/BEC_I/background.html
control...?
October 3th, 2013. Bordeaux
October 3th, 2013. BordeauxT Kraemer Nature 440, 315 (2006)
October 3th, 2013. BordeauxI Bloch Nature Phys. 1, 23 (2005)
October 3th, 2013. BordeauxM Baranov et al. Chem. Rev. 112, 5012 (2012)
October 3th, 2013. BordeauxG Quéméner and PS Julienne Chem. Rev. 112, 4949 (2012)
October 3th, 2013. BordeauxKP Schmidt et al. Phys. Rev. Lett. 101, 150405 (2008)
Novel condensed phases
October 3th, 2013. Bordeaux
is it...
RECOGNITION?
October 3th, 2013. Bordeauxultracold in title: ISI Web of Knowledge (30/09/2013)
publications
citations
October 3th, 2013. Bordeauxultracold in title, PRL: ISI Web of Knowledge (30/09/2013)
publications (PRL)
citations (PRL)
October 3th, 2013. Bordeaux
Steven Chu Claude Cohen-Tannouidji
William D. Phillips
Serge Haroche David Wineland
Eric A. CornellWolfgang KetterleCarl E. Wieman
1997
2001
2012
Photos: U Montan
Photos: The Nobel Foundation
Photos: The Nobel Foundation
“... methods that enable measuring and manipulation of individual
quantum systems...”
“... achievement of Bose-Einsten condensation... fundamental
studies of the properties of the condensates.”
“... methods to cool and trap atoms with laser light.”
October 3th, 2013. Bordeaux
1997
2001
2012
October 3th, 2013. Bordeaux
Indirectly*
* from ultracold atoms
October 3th, 2013. Bordeaux
The `ultracold' Periodic Table
October 3th, 2013. BordeauxFig. from J Herbig et al. Science 301, 1510 (2003)
M agneto-association
October 3th, 2013. BordeauxT Takekoshi et al. Phys. Rev. A. 85, 032506 (2012)
October 3th, 2013. BordeauxFig .from J Ulmanis et al. Chem. Rev. 112, 4890 (2012)
P hoto-association
October 3th, 2013. Bordeaux
Directly* * from `warm' species
October 3th, 2013. BordeauxLD Carr et al. New J. Phys. 11, 055049 (2009)
Collisions
Evaporative coolingBuffer-gas cooling
Sympathetic cooling
THERMALIZATION
Lifetimes in trapsTrap losses
TRAP DYNAMICS
Reproduce · Understand · PredictOctober 3th, 2013. Bordeaux
October 3th, 2013. Bordeaux
October 3th, 2013. Bordeaux
`Traditional' coupled-channel methodology
Problem
N coupled (differential) equations
Observables!(SS/TT matrix)
effort (time) ∝ N3
interpretation
October 3th, 2013. Bordeaux
effort/calc. Low anisotropy Large anisotropy
Rotation N ≈ 1–10 t ∝ (m)seconds
N ≈ 102–104
t ∝ mins, hours...
Fine(electronic spin)
N' ≈ N ✕ 2–10 t' ≈ t ✕10–103
Hyperfine(nuclear spin)
N' ✕ 2–102 t' ✕10–106
1Basis size
FrustrationFrustration
October 3th, 2013. Bordeaux
Field strengthCollision energy
Collisions take place in traps...
... at a given 'temperature'.
Potential 'survey'
Well... and potentials are not 100% accurate
+ field strength '2'+ angle f1/f2
...
Hmm... if we really need to make it 'real'...
2Parameters
October 3th, 2013. Bordeaux
Jan 31, 2013. MMQA'13, London
... there are alternatives, aren't there?!
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Uff... do we really have to?
I know... but how far can we go if...?
... sure there aren't other ways?
NO (if it's difficult!): Bohn's (et al.) statistical approach Phys. Rev. A 85, 062712 (2012) Phys. Rev. A 87, 012709 (2013)
total-J approximation: Tsherbul's (et al.) J. Chem. Phys. 133, 184104 (2010) Phys. Rev. A 84, 040701 (2011) J. Chem. Phys. 137, 024103 (2012) Phys. Rev. A 85, 052710 (2012)
Multichannel Quantum Defect Theory: Croft's (et al.) Phys. Rev. A 84, 042703 (2011) Phys. Rev. A 86, 022711 (2012) Phys. Rev. A 87, 032710 (2013)
McBane (optimisations, approximations)MLGM (approximate hyperfine, single column)
1 2
1
1
To 'CC' or not to 'CC'...
'1'
October 3th, 2013. Bordeaux
October 3th, 2013. Bordeaux
October 3th, 2013. BordeauxM Mayle et al. Phys. Rev. A 85, 062712 (2012)
October 3th, 2013. BordeauxM Mayle et al. Phys. Rev. A 85, 062712 (2012)
October 3th, 2013. Bordeaux
quantum Scattering at Ultracold temPERatures:a few S-matrix COLumns is all we neeD
October 3th, 2013. Bordeaux
October 3th, 2013. Bordeaux
pioneering
multi-disciplinary
evolving
Many Thanks!