香港中文大学：Ultracold polar molecules

Ultracold polar molecules Dajun Wang Department of Physics Chinese university of Hong Kong 2/3/2021

2/3/2021 1 Ultracold polar molecules Dajun Wang Department of Physics, Chinese University of Hong Kong

Motivation May, 2007, Postdoc interview talk Ultracold polar molecules High precision spectroscopy a Quantum computing a Molecular quantum degeneracy Collisions and reactions with oriented molecules a vibrational quenching:KRb(v")→>KRb(v”1) a exchange reaction: KRb+K>K2+rb Krb+Krb >K2 rb, 2/3/2021

2/3/2021 2 Motivation Ultracold Polar molecules: n High precision spectroscopy n Quantum computing n Molecular quantum degeneracy n Collisions and reactions with oriented molecules: q vibrational quenching: KRb (v")  KRb (v"-1) q exchange reaction: KRb + K  K2 + Rb, KRb + KRb  K2 + Rb2 May, 2007, Postdoc interview talk

Making cold molecules May, 2007, Postdoc interview talk hot laser cool old molecules molecules .buffer gas cooling .electrostatic slowing hot mechanical slowing d cO molecules molecules photoassociation old .Feshbach resonances d cO atoms molecules 2/3/2021

2/3/2021 3 Making cold molecules hot molecules cold molecules hot molecules cold molecules cold atoms cold molecules laser cool •buffer gas cooling •electrostatic slowing •mechanical slowing •photoassociation •Feshbach resonances ? May, 2007, Postdoc interview talk

Making cold molecules hot laser cool old molecules molecules .buffer gas cooling .electrostatic slowing hot mechanical slowing d cO molecules molecules photoassociation old .Feshbach resonances d cO atoms molecules 2/3/2021

2/3/2021 4 Making cold molecules hot molecules cold molecules hot molecules cold molecules cold atoms cold molecules laser cool •buffer gas cooling •electrostatic slowing •mechanical slowing •photoassociation •Feshbach resonances

Cold molecule is hot Bookmark this page FAQ Member pages RSS Sitemap Subscribe E UROPERN CIENCE 口 UINOETION SETTING SCIENCE AGENDAS FOR EUROPE Collaborative Research Projects(CRPs) EuroQUAM Funded CRPs DOS Quantum Simulation using cold atoms in optical lattices FerMix Fermionic Mixtures of Ultracold Atoms: Pairing, Superfluidity and Quantum Phases CoPoMol Collisions of Cold Polar Molecules CIGMA Controlled Interactions in Quantum Gases of Metastable Atoms CMMC Cavity-Mediated Molecular cooling QUDIPMOL Quantum-degenerate dipolar gases of bialkali molecules Events EuroQUAM Projects 2/3/2021

Cold molecule is hot 2/3/2021 5

Cold molecule is hot National Basic Research program of China(973 Program) 项目编号 项目名称 项目首席 科学家项目第一承担单位 项目依托部门 201CB910(基于核酸适配体的蛋白质研究新技术和新方法谭蔚泓湖南大学 教育部 20cB9于上海同步辐射光源的结构生物字技术和方法研张荣光中国科学院上海生命中科学院上净市科 CB9220量子通信网络和量子仿真关键器件的物理实现何力新中国科学技术大学中国科学院 2010B9230基于光与冷原子的量子物理和量子信息 潘建伟中国科学技术大学中国科学院 201lDB921400分子尺度的量子设计与调控 杨金龙|中国科学技术大学中国科学院 01CB921500基于超冷原子、分子体系的新物态和量子仿真研究刘伍明 中国科学院物理研究 中国科学院 01(CB92160冷原子分子系综的量子调控与量子信息技术 张卫平华东师范大学 教育部上海市科学技 出同礼母物征的人术委员会 New material and quantum simulation based on ultracold atomic and molecular systems Quantum control and quantum information with ultracold atoms and molecules 2/3/2021

Cold molecule is hot 2/3/2021 6 National Basic Research Program of China(973 Program) New material and quantum simulation based on ultracold atomic and molecular systems Quantum control and quantum information with ultracold atoms and molecules

Cold and ultracold molecule Quantum information Buffer gas and Stark decelerator Dipolar collisions Doyle, Meijer, Ye, Rempe, J-P Yin Dipolar quantum gas Dipolar phase transitions Many-body physics Photoassociation Ultracold chemistry DeMille, Stwalley, Bigelow Weidemuller S Inouye, S-TJia Li You Su Yi.L. santos Feshbach molecule STIRAP L Carr. DeMille. Lewenstein Ye jin, Nagerl, Denschlag, Zoller. Buchler. Lukin .h. pu Cornish Baranov, Meystre, Shlyapnikov, Kurizki Bohn Krems Laser cooling DeMille. Ye The main theme: production of high PSD sample 2/3/2021

Cold and ultracold molecule 2/3/2021 7 Quantum information Dipolar collisions Dipolar quantum gas Dipolar phase transitions Many-body physics Ultracold chemistry …… Li You, Su Yi, L. Santos, L. Carr, DeMille, Lewenstein, Zoller, Büchler, Lukin, H. Pu, Baranov, Meystre, Shlyapnikov, Kurizki, Bohn, Krems …… Buffer gas and Stark decelerator: Doyle, Meijer, Ye, Rempe, J-P Yin…… Photoassociation: DeMille, Stwalley, Bigelow, Weidemüller, S. Inouye, S-T Jia…… Feshbach molecule + STIRAP: Ye & Jin, Nägerl, Denschlag, Cornish … Laser cooling DeMille, Ye The main theme: production of high PSD sample

Technology for cold molecules Carr, DeMille, Krems, ye, New J Phys. 2009 Quantum degeneracy ①- space density 12 coherent state transfer Enhanced PA? Laser cooling? Sympathetic cooling Buffer-gas Evaporative cooling? g Stark magnetIc tical deceleration Photo-association loglo(temperature [k]) 6

lo g 1 0 ( d e n sit y [ c m-3 ] ) log10 (temperature [K]) -9 -6 -3 0 3 6 9 12 Stark, magnetic, optical deceleration Buffer-gas cooling Photo-association Coherent state transfer Quantum degeneracy Enhanced PA? Laser cooling? Sympathetic cooling? Evaporative cooling? F-space density Technology for cold molecules Carr, DeMille, Krems, Ye, New. J. Phys. 2009

Science with cold molecules Carr, DeMille, Krems, ye, New J Phys. 2009 Novel phas quantum many-body 12-Dipolar quantum gas Quantum information Ultracold Chemistry Molecule optics circuitry 9 Cold controlled chemistry Phase space Novel collisions densi Fundamental tests Precision measurement 3 log1o(temperature [k 0

-9 -6 -3 0 3 6 9 12 Science with cold molecules Carr, DeMille, Krems, Ye, New. J. Phys. 2009. lo g 1 0 ( d e n sit y [ c m-3 ] ) log10 (temperature [K]) Novel phases & quantum many-body Dipolar quantum gas Quantum information Ultracold Chemistry Molecule optics & circuitry Cold controlled chemistry Novel collisions Fundamental tests Precision measurement Phase space density

O utline 口 Photoassociation a Experiments with Polar molecule near quantum regeneracy Laser cooling of molecules: a new possibil Conclusion and outlook 2/3/2021

Outline 2/3/2021 10 q Photoassociation q Experiments with Polar molecule near quantum degeneracy qLaser cooling of molecules: a new possibility qConclusion and outlook