论文标题
量子与骨环环境强烈相互作用：热状态的几何形状
A qubit strongly interacting with a bosonic environment: Geometry of thermal states
论文作者
论文摘要
热力学的标准理论指出，与热环境接触的量子系统会放松到称为Gibbs状态的平衡状态，在该系统的能量本元基质中发生了反应。当系统与环境之间的相互作用很强时，可以达到不同平衡状态，而在系统能量本质上，该状态不是对角线的。 Zurek的Einselection理论预测，在强联耦合方面，将其变质性在所谓的指针基础上进行，可以将其视为环境对系统的连续测量。因此，在强耦合方面下的热状态预计在指针状态而不是能量本征态在对角线。我们认为，在强耦合极限的热态状态是指向指针基础上的吉布斯状态，并通过一个简单的单个量子位模型与波索克环境强烈相互作用。
A standard theory of thermodynamics states that a quantum system in contact with a thermal environment relaxes to the equilibrium state known as the Gibbs state wherein decoherence occurs in the system's energy eigenbasis. When the interaction between the system and environment is strong, a different equilibrium state can be reached that is not diagonal in the system energy eigenbasis. Zurek's theory of einselection predicts that the decoherence takes place in the so-called pointer basis under the strong coupling regime, which can be viewed as continuous measurement of the system by the environment. The thermal state under the strong coupling regime is thus expected to be diagonal in the pointer states rather than energy eigenstates. We have postulated that the thermals state in the strong coupling limit is a Gibbs state projected onto the pointer basis and have demonstrated this with a simple model of single qubit strongly interacting with a bosonic environment.
