Scheme to probe the decoherence of a macroscopic object
Scheme to probe the decoherence of a macroscopic object
复制标题
DOI：
10.1103/physreva.59.3204
复制
发表时间：
1999-05-01
影响因子：
2.9
通讯作者：
Knight, PL
中科院分区：
文献类型：
--
作者：
Bose, S;Jacobs, K;Knight, PL
我们提出了薛定谔著名的格丹肯实验的量子光学版本，其中微观系统的状态（空腔场）与大质量物体（可移动镜子）的状态纠缠和解开。尽管在演化过程中产生了薛定谔猫态的混合（由于宏观镜在热状态下开始），这种设置使我们能够系统地探索宏观物体的空间分离状态的叠加退相干的规则。研究发现，测试环境引起的退相干模型所需的参数范围接近于当前可实现的参数范围，而检测重力引起的塌陷所需的参数范围远远超出了当前技术。 [S1050-2947(99)01405-5]。
We propose a quantum optical version of Schrodinger's famous gedanken experiment in which the state of a microscopic system (a cavity field) becomes entangled with and disentangled from the state of a massive object (a movable mirror). Despite the fact that a mixture of Schrodinger cat states is produced during the evolution (due to the fact that the macroscopic mirror starts off in a thermal state), this setup allows us to systematically probe the rules by which a superposition of spatially separated states of a macroscopic object decoheres. The parameter regime required to test environment-induced decoherence models is found to be close to those currently realizable, while that required to detect gravitationally induced collapse is well beyond current technology. [S1050-2947(99)01405-5].