|Budget Amount *help
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2013: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2010: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
In this study, we have studied various types of symmetry breaking in ultracold atomic gases. Special focus is made on Bose-Einstein condensates (BECs) with spin degrees of freedom, systems subject to spin-orbit interactions, and fast-rotating Bose systems subject to synthetic gauge fields. As for the first topic, we have succeeded in developing spinor Beliaev theory which is the next-order theory beyond Bongoliubov theory, and used it to successfully explain the phase transition in spin-2 BECs. As for the second topic, we have found various types of quantized vortices and vortex lattices which arises from spin-orbit interactions. As for the last topic, we have found the quantum Hall effect of bosons.