Quasiprobability Distribution of Squeezed Thermal Spin States in Ferromagnet

We study squeezed properties of magnon squeezed thermal spin states by using the distribution of Q function in the ferromagnet. It is found that the distribution of Q function strongly depends on the temperature T and coupling parameter γ. Below the transition temperature Tc, the distribution Q function in the squeezed thermal spin state presents a richer structure than in the normal state. Non-classical effects have been observed. In the transition from the normal to the squeezed thermal spin state, the phase symmetry of the magnon system is spontaneously broken.

磁体和线圈相对静止的发电装置

如果说磁体和线圈相对静止可以输出电能,或许谁都不会相信,因为法拉第的电磁感应明确表明相对运动是最重要的。如果说在相对静止的磁体和线圈之间有一个圆筒转子,转子上有两个对称的孔(起到漏磁作用),这两个孔正好与磁体和线圈同心,电磁感应规律证明这的确是一台发电机。