A spin laser?: The persistent processing domain in superfluid 3He-B at ultralow temperatures
A spin laser?: The persistent processing domain in superfluid 3He-B at ultralow temperatures
复制标题
DOI：
10.1016/s0921-4526(02)01886-0
复制
发表时间：
2003-05-01
影响因子：
2.8
通讯作者：
Skyba, P
中科院分区：
文献类型：
--
作者：
Fisher, SN;Guénault, AM;Skyba, P
讨论了He-3-B超流体中持续处理域（PPD，原PIS）的各种性质。这些奇异的核磁共振畴只能在超低温下激发。在最低温度下，它们可以自由地挤压长达2000秒的时间。我们根据结构和磁场剖面确定了各种行为。我们可以用小的产生脉冲来创建域或连续激励域，但激励频率必须高于域进动的频率。值得注意的是，我们可以通过应用白噪声来激发和维持进动。因此,。不同寻常的是，相干域可以从非相干的能量源中提取能量。(C) 2003年Elsevier Science B.V.出版
We discuss various properties of the persistent precessing domain (PPD, formerly PIS) in superfluid He-3-B. These exotic NMR domains can only be excited at ultralow temperatures. At the lowest temperatures they freely precess for periods up to 2000 s. We identify various behaviors depending on the texture and magnetic field profile. We can create the domains with small generating pulses or excite them continuously but only with an excitation frequency higher than that of the domain precession. Remarkably, we can excite and sustain the precession by the application of white noise. Thus,. unusually, the coherent domain can extract energy from an incoherent energy source. (C) 2003 Published by Elsevier Science B.V.