Quantum spin liquid
![Frustrated Ising spins on a triangle.](/Images/godic/202502/05/Triangular_ising_spin5538.png")
![Valence bond solid. The bonds form a specific pattern and consist of pairs of entangled spins.](/Images/godic/202502/05/Valence_bond_solid5539.png")
![Spinon moving in spin liquids.](/Images/godic/202502/05/Spinon_moving5539.png")
![Herbertsmithite, the mineral whose ground state was shown to have QSL behaviour](/Images/godic/202502/05/Herbertsmithite-herb03a5539.jpg")
In condensed matter physics, quantum spin liquid is a state that can be achieved in a system of interacting quantum spins. The state is referred to as a “liquid” as it is a disordered state in comparison to a ferromagnetic spin state, much in the way liquid water is in a disordered state compared to crystalline ice. However, unlike other disordered states, a quantum spin liquid state preserves its disorder to very low temperatures.