maykel l. gonzález-martínez challenges @ ultracold temperatures maykel.gonzalez-martinez@u-psud.fr...

Maykel L. González-Martínez

Challenges @ ultracold temperatures

maykel.gonzalez-martinez@u-psud.fr 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?!

October 3th, 2013. 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, 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!