Quantum statistical effects on a molecular formation in an ultracold temperature regime

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287090
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: The University of Electro-Communications
• Principal Investigator: Mukaiyama Takashi 電気通信大学, レーザー新世代研究センター, 准教授 (70376490)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: レーザー冷却 / イオントラップ / 原子気体 / 極低温化学反応

Outline of Final Research Achievements

Charge-exchange collisions between ultracold 6Li atoms and 40Ca+ ions are observed in the temperature range of 1mK to 1K. The reaction product of the charge-exchange collision is identified via mass spectrometry. The cross sections of the charge-exchange collisions between 6Li atoms in the ground state and 40Ca+ ions in the ground and metastable excited states are determined. Deliberately excited ion micromotion is used to control collision energy of atoms and ions. The energy dependence of the charge-exchange collision cross section obeys the Langevin model in the temperature range of the current experiment, and the measured magnitude of the cross section is correlated to the internal state of the 40Ca + ions. Revealing the relationship between the charge-exchange collision cross sections and the interaction potentials is an important step toward the realization of the full quantum control of the chemical reactions at an ultralow-temperature regime.

Free Research Field

量子エレクトロニクス