论文标题
通过连续量子非隔离测量在氦3中的核自旋挤压
Nuclear spin squeezing in Helium-3 by continuous quantum nondemolition measurement
论文作者
论文摘要
我们提出了一种技术，以控制使用光中量子状态下氦3蒸气的宏观集体核自旋。该方案依靠亚稳定性交换碰撞来介导光学上可访问的亚稳态状态与地面核自旋之间的相互作用，从而导致了法拉第形式的有效核自旋量子量子非约束相互作用。我们的技术实现了基于测量的核自旋的量子控制，例如制备自旋方态。这与氦3中核自旋状态的一天的连贯性时间相结合，为量子技术中的许多应用开辟了可能性。
We propose a technique to control the macroscopic collective nuclear spin of a Helium-3 vapor in the quantum regime using light. The scheme relies on metastability exchange collisions to mediate interactions between optically accessible metastable states and the ground-state nuclear spin, giving rise to an effective nuclear spin-light quantum nondemolition interaction of the Faraday form. Our technique enables measurement-based quantum control of nuclear spins, such as the preparation of spin-squeezed states. This, combined with the day-long coherence time of nuclear spin states in Helium-3, opens the possibility for a number of applications in quantum technology.
