Maykel L. González-Martínez ultracold temperatures October 3 th, Bordeaux

Why?

October 3 th, Bordeaux... it's not about the money

October 3 th, Bordeaux (the) science is cool!

G Quéméner and PS Julienne Chem. Rev. 112, 4949 (2012) October 3 th, Bordeaux... fairly cold

control...? October 3 th, Bordeaux

T Kraemer Nature 440, 315 (2006)

October 3 th, Bordeaux I Bloch Nature Phys. 1, 23 (2005)

October 3 th, Bordeaux M Baranov et al. Chem. Rev. 112, 5012 (2012)

October 3 th, Bordeaux G Quéméner and PS Julienne Chem. Rev. 112, 4949 (2012)

October 3 th, Bordeaux KP Schmidt et al. Phys. Rev. Lett. 101, (2008) Novel condensed phases

October 3 th, Bordeaux is it... RECOGNITION?

October 3 th, Bordeaux ultracold in title: ISI Web of Knowledge (30/09/2013) publications citations

October 3 th, Bordeaux ultracold in title, PRL: ISI Web of Knowledge (30/09/2013) publications (PRL) citations (PRL)

October 3 th, Bordeaux Steven ChuClaude Cohen- Tannouidji William D. Phillips Serge HarocheDavid Wineland Eric A. CornellWolfgang KetterleCarl E. Wieman Photos: U Montan 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 3 th, Bordeaux

October 3 th, Bordeaux Indirectly* * from ultracold atoms

October 3 th, Bordeaux The `ultracold' Periodic Table

October 3 th, Bordeaux Fig. from J Herbig et al. Science 301, 1510 (2003) M agneto-association

October 3 th, Bordeaux T Takekoshi et al. Phys. Rev. A. 85, (2012)

October 3 th, Bordeaux Fig.from J Ulmanis et al. Chem. Rev. 112, 4890 (2012) P hoto-association

October 3 th, Bordeaux Directly* * from `warm' species

October 3 th, Bordeaux LD Carr et al. New J. Phys. 11, (2009)

Collisions Evaporative cooling Buffer-gas cooling Sympathetic cooling THERMALIZATION Lifetimes in traps Trap losses TRAP DYNAMICS Reproduce · Understand · Predict October 3 th, Bordeaux

`Traditional' coupled-channel methodology Problem N coupled (differential) equations Observables! ST (S/T matrix) effort (time) ∝ N 3 interpretation October 3 th, Bordeaux

effort/calc. Low anisotropyLarge anisotropy Rotation N ≈ 1–10 t ∝ (m)seconds N ≈ 10 2 –10 4 t ∝ mins, hours... Fine (electronic spin) N' ≈ N ✕ 2–10 t' ≈ t ✕ 10–10 3 Hyperfine (nuclear spin) N' ✕ 2–10 2 t' ✕ 10– Basis size Frustration October 3 th, Bordeaux

Field strength Collision energy Collisions take place in traps at a given 'temperature'. Potential 'survey' Well... and potentials are not 100% accurate + field strength '2' + angle f 1 /f 2... Hmm... if we really need to make it 'real'... 2 Parameters October 3 th, Bordeaux

Jan 31, MMQA'13, London

... there are alternatives, aren't there?! October 3 th, Bordeaux

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, (2012) Phys. Rev. A 87, (2013) total-J approximation: Tsherbul's (et al.) J. Chem. Phys. 133, (2010) Phys. Rev. A 84, (2011) J. Chem. Phys. 137, (2012) Phys. Rev. A 85, (2012) Multichannel Quantum Defect Theory: Croft's (et al.) Phys. Rev. A 84, (2011) Phys. Rev. A 86, (2012) Phys. Rev. A 87, (2013) McBane (optimisations, approximations) MLGM (approximate hyperfine, single column) To 'CC' or not to 'CC'... '1' October 3 th, Bordeaux

M Mayle et al. Phys. Rev. A 85, (2012)

October 3 th, Bordeaux M Mayle et al. Phys. Rev. A 85, (2012)

October 3 th, Bordeaux quantum Scattering at Ultracold temPERatures: a few S-matrix COLumns is all we neeD

October 3 th, Bordeaux

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Many Thanks!