Perreault William E, Zhou Haowen, Mukherjee Nandini, Zare Richard N
Department of Chemistry, Stanford University, Stanford, California 94305, USA.
Phys Rev Lett. 2020 Apr 24;124(16):163202. doi: 10.1103/PhysRevLett.124.163202.
A large ensemble of ∼10^{9} H_{2} (v=7, j=0) molecules is prepared in the collision-free environment of a supersonic beam by transferring nearly the entire H_{2} (v=0, j=0) ground-state population, where v and j are the vibrational and rotational quantum numbers, respectively. This is accomplished by controlling the crossing of the optically dressed adiabatic states using a pair of phase coherent laser pulses. The preparation of highly vibrationally excited H_{2} molecules opens new opportunities to test fundamental physical principles using two loosely bound yet entangled H atoms.
通过转移几乎所有处于基态的H₂（v = 0，j = 0）分子，在超音速束的无碰撞环境中制备了大约10⁹个H₂（v = 7，j = 0）分子的大系综，其中v和j分别是振动和转动量子数。这是通过使用一对相位相干激光脉冲控制光学修饰的绝热态的交叉来实现的。制备高度振动激发的H₂分子为使用两个松散束缚但纠缠的H原子来测试基本物理原理开辟了新机会。
