In condensed matter physics there is a novel phase termed ‘quantum spin liquid’, in which strong quantum fluctuations prevent long-range magnetic order from being estab lished, and so electron spins do not form an ordered pattern but remain liquid-like even at absolute zero temperature. Such a phase is not involved in any spontaneous symmetry breaking and local order parameter, and to understand it is beyond conventional phase transition theory. Due to the rich physics and exotic properties of quantum spin liquids, such as long-range entanglement and fractional quantum excitations, which are believed to hold great potential for quantum communication and computation, they have been intensively studied since the concept was proposed in 1973 by P.W. Anderson. Currently, experimental identification of a quantum spin liquid remains a great challenge. Here, we highlight some interesting experimental progress that has been made recently. We also discuss outstanding issues and raise questions that we consider to be important for future research.

在凝聚态物理学中，有一个称为“量子自旋液体”的新型相，其中强的量子涨落阻止建立远距离磁阶，因此电子自旋不会形成有序模式，即使在绝对温度下也像液体一样。零温度。这样的相位不涉及任何自发的对称性破坏和局部有序参数，并且要理解它超出了常规的相变理论。由于量子自旋液体具有丰富的物理特性和奇异特性，例如长距离纠缠和分数量子激发，它们被认为具有巨大的量子通信和计算潜力，因此自1973年提出该概念以来，已经对其进行了深入研究。 PW安德森。目前，对量子自旋液体的实验鉴定仍然是巨大的挑战。在这里，我们重点介绍了最近取得的一些有趣的实验进展。我们还将讨论悬而未决的问题，并提出我们认为对未来研究很重要的问题。