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Collisions of Polar Molecules with Ultracold Alkali Metal Atoms (IP3 of EuroQUAM CoPoMol)

极性分子与超冷碱金属原子的碰撞（EuroQUAM CoPoMol 的 IP3）

基本信息

批准号：
EP/E039200/1
负责人：
Jeremy Hutson
金额：
$ 33.83万
依托单位：
Durham University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FE039200%2F1
关键词：
Collisions Polar Molecules Ultracold Alkali

项目摘要

At very low temperatures, matter enters a new regime where its properties are fully quantum-mechanical. Such quantum matter is very precisely controllable and offers many new properties that are likely to form the basis of future technologies. The EuroQUAM Programme is a EUROCORES Programme coordinated by the European Science Foundation to develop European research in Cold Quantum Matter. A major objective of the EuroQUAM programme is to achieve quantum degeneracy for polar molecules. It is already possible to slow polar molecules almost to rest using inhomogeneous electric fields and trap them at temperatures around 1 milliKelvin. However, quantum degeneracy requires considerably lower temperatures, and to achieve it for decelerated molecules it will be necessary to develop a second-stage cooling mechanism that can reach the sub-microKelvin regime. A very promising approach to this is sympathetic cooling, in which the molecules are cooled by contact with ultracold atoms. The CoPoMol proposal brings together two leading experimental groups (Berlin, London) and three theoretical groups (Durham, Warsaw, Nijmegen) to explore sympathetic cooling and to develop our understanding of atom-molecule and molecule-molecule collisions. The interplay between theory and experiment was pivotal in the creation of atomic quantum gases and will be equally crucial for polar molecules. This proposal is for a closely integrated experimental and theoretical study. The Durham work will focus on theoretical aspects of the atom-molecule collisions that are crucial for sympathetic cooling. The proposal as a whole will provide the basis for achieving condensation to form a dipolar quantum gas and pave the the way to the development of controlled ultracold chemistry.

在非常低的温度下，物质进入一个新的状态，其特性完全是量子力学的。这种量子物质是非常精确可控的，并提供了许多可能构成未来技术基础的新特性。 EuroQUAM 计划是由欧洲科学基金会协调的 EUROCORES 计划，旨在发展欧洲在冷量子物质方面的研究。 EuroQUAM 计划的一个主要目标是实现极性分子的量子简并性。利用非均匀电场使极性分子几乎静止不动，并在 1 毫开尔文左右的温度下捕获它们，已经成为可能。然而，量子简并性需要相当低的温度，为了使减速分子实现这一点，有必要开发一种可以达到亚微开尔文状态的第二级冷却机制。一种非常有前途的方法是交感冷却，其中分子通过与超冷原子接触来冷却。 CoPoMol 提案汇集了两个领先的实验小组（柏林、伦敦）和三个理论小组（达勒姆、华沙、奈梅亨）来探索交感冷却并加深我们对原子-分子和分子-分子碰撞的理解。理论与实验之间的相互作用对于原子量子气体的产生至关重要，对于极性分子也同样至关重要。该提案旨在进行紧密结合的实验和理论研究。达勒姆的工作将集中于原子分子碰撞的理论方面，这对于交感冷却至关重要。整个提案将为实现凝聚形成偶极量子气体提供基础，并为受控超冷化学的发展铺平道路。