Opt Express. 2023 Feb 27;31(5):8335-8341. doi: 10.1364/OE.481977.
Magnons have demonstrated enormous potential for the next generation of information technology and quantum computing. In particular, the coherent state of magnons resulting from their Bose-Einstein condensation (mBEC) is of great interest. Typically, mBEC is formed in the magnon excitation region. Here we demonstrate for the first time by optical methods the permanent existence of mBEC at large distances from the magnon excitation region. The homogeneity of the mBEC phase is also demonstrated. The experiments were carried out on films of yttrium iron garnet magnetized perpendicular to the surface and at room temperature. We use the method described in this article to develop coherent magnonics and quantum logic devices.
磁振子在下一代信息技术和量子计算方面显示出了巨大的潜力。特别是，由于玻色-爱因斯坦凝聚（mBEC）而产生的磁振子相干态引起了极大的兴趣。通常，mBEC 是在磁振子激发区域中形成的。在这里，我们首次通过光学方法证明了 mBEC 在远离磁振子激发区域的大距离处的永久存在。还证明了 mBEC 相的均匀性。实验是在垂直于表面且在室温下磁化的钇铁石榴石薄膜上进行的。我们使用本文中描述的方法来开发相干磁振子和量子逻辑器件。
