标题： 三粒子系统中量子相干分解与贸易关系的实验研究 显示英文标题

标题： Experimental study of quantum coherence decomposition and trade-off relations in a tripartite system

摘要： 量子相干性是所有量子度量中最基本的，它支撑着其他著名的量，如纠缠、量子失谐和贝尔关联。 它可以以多种方式在多体系统中分布——例如，在双体系统中，它可以在子系统内存在（局部相干性）或在子系统之间集体存在（全局相干性），并表现出一种权衡关系。 在具有两个以上子系统的量子系统中，由于相干性的各种分解方式，存在更多的权衡关系。 在本文中，我们通过改变状态从一个乘积态到一个三体纠缠态，使用自旋系统在绝热演化的量子系统中实验验证了这些相干性权衡关系。 我们研究了原始状态、双体乘积态、三体乘积态和退相干乘积态之间的全部相干性权衡关系。 我们还实验验证了独占不等式，并表明除了初始乘积态外，量子系统都是多占的。 我们发现，尽管涉及不同类型的态，但在相干性和独占性方面，态的性质是等价的。 这说明了使用相干性作为量子态表征工具的实用性。 显示英文摘要

摘要： Quantum coherence is the most fundamental of all quantum quantifiers, underlying other well-known quantities such as entanglement, quantum discord, and Bell correlations. It can be distributed in a multipartite system in various ways -- for example, in a bipartite system it can exist within subsystems (local coherence) or collectively between the subsystems (global coherence) and exhibits a trade-off relation. In quantum systems with more than two subsystems, there are more trade-off relations, due to the various decomposition ways of the coherence. In this paper, we experimentally verify these coherence trade-off relations in adiabatically evolved quantum systems using a spin system by changing the state from a product state to a tripartite entangled state. We study the full set of coherence trade-off relations between the original state, the bipartite product state, the tripartite product state, and the decohered product state. We also experimentally verify the monogamy inequality and show that both the quantum systems are polygamous except for the initial product state. We find that despite the different types of states involved, the properties of the state in terms of coherence and monogamy are equivalent. This illustrates the utility of using coherence as a characterization tool for quantum states.