Researching Topics


Theoretical study on the physics of ultracold quantum gases and Bose Einstein condensation

　　 　　 　　
1, Quantized vortices in atomic Bose-Einstein condensates
2, Nonlinear dynamics and pattern formation in Bose Einstein condensates
3, Theoretical analysis of the Kibble-Zurek mechanism (scenario of the order structure formation in the early universe) in the superfluidity helium system

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Book

[1] K. Kasamatsu and M. Tsubota
Quantized vortices in atomic Bose-Einstein condensates
Prog. Low Temp. Phys. 16, pp. 349-401 (ed. W.P. Halperin and M. Tsubota, Elsevier, Amsterdam, 2008).

Paper


[18] H. Takeuchi, K. Kasamatsu, and M. Tsubota
Spontaneous radiation and amplification of Kelvin waves on quantized vortices in Bose-Einstein condensates
Phys. Rev. A 79, 033619 (2009).

[17] K. Kasamatsu and M. Tsubota
Vortex sheet in rotating two-component Bose-Einstein condensates
Phys. Rev. A 79, 023606 (2009).

[16] K. Kasamatsu
Uniformly frustrated bosonic Josephson junction array
Phys. Rev. A 79, 021604 (2009).

[15] K. Kasamatsu and M. Tsubota
Dynamical Vortex Phases in a Bose-Einstein Condensate Driven by a Rotating Optical Lattice
Phys. Rev. Lett. 97, 240404 (2006).

[14] K. Kasamatsu and M. Tsubota
Modulation instability and solitary-wave formation in two-component Bose-Einstein condensates
Phys. Rev. A 74, 013617 (2006).

[13] K. Kasamatsu, M. Machida, N. Sasa and M. Tsubota
Three-dimensional dynamics of vortex lattice formation in Bose-Einstein condensates
Phys. Rev. A 71, 063616 (2005).

[12] K. Kasamatsu, M. Tsubota and M. Ueda
Vortices in multicomponent Bose-Einstein condensates
(Invited review article) Int. J. Mod. Phys. B 19, 1835 (2005).

[11] K. Kasamatsu, M. Tsubota and M. Ueda
Spin textures in rotating two-component Bose-Einstein condensates
Phys. Rev. A 71, 043611 (2005).

[10] K. Kasamatsu, M. Tsubota and M. Ueda
Vortex Molecules in Coherently Coupled Two-Component Bose-Einstein Condensates
Phys. Rev. Lett. 93, 250406 (2004).

[9] K. Kasamatsu and M. Tsubota
Multiple Domain Formation Induced by Modulation Instability in Two-Component Bose-Einstein Condensates
Phys. Rev. Lett. 93, 100402 (2004).

[8] K. Kasamatsu, M. Tsubota, and M. Ueda
Quadrupole and scissors modes and nonlinear mode coupling in trapped two-component Bose-Einstein condensates
Phys. Rev. A 69, 043621 (2004).

[7] M. Tsubota, K. Kasamatsu and T. Araki
Dynamics of quantized vortices in superfluid helium and rotating Bose-Einstein condensates
(Invited review article) Recent Res. Devel. Physics, 4 , 631 (2003).

[6] K. Kasamatsu, M. Tsubota, and M. Ueda
Vortex Phase Diagram in Rotating Two-Component Bose-Einstein Condensates
Phys. Rev. Lett. 91, 150406 (2003).

[5] K. Kasamatsu, M. Tsubota, and M. Ueda
Nonlinear dynamics of vortex lattice formation in a rotating Bose-Einstein condensate
Phys. Rev. A, 67, 033610 (2003).

[4] K. Kasamatsu, M. Tsubota, and M. Ueda
Giant hole and circular superflow in a fast rotating Bose-Einstein condensate
Phys. Rev. A, 66, 053606 (2002).

[3] M. Tsubota, K. Kasamatsu, and M. Ueda
Vortex lattice formation in a rotating Bose-Einstein condensate
Phys. Rev. A, 65, 023603 (2002).

[2] K. Kasamatsu, Y. Yasui, and M. Tsubota
Macroscopic quantum tunneling of two-component Bose-Einstein condensates
Phys. Rev. A, 64, 053605 (2001).

[1] M. Tsubota and K. Kasamatsu
Josephson Current Flowing in Cyclically Coupled Bose-Einstein Condensates
J. Phys. Soc. Jpn, 69, 1942 (2000).


（International conference proceedings）
[15] K. Kasamatsu
Uniformly frustrated Josephson junction array in trapped Bose-Einstein condensates
a special issue of Journal of Physics Condensed Matter, in press (2009)

[14] K. Kasamatsu and M. Tsubota
Static and Dynamic Properties of Multicomponent Bose-Einstein Condensates of Ytterbium Atoms
J. Low Temp. Phys. 150, 599 (2008).

[13] K. Kasamatsu
Vortex Lattices in Rotating Bose-Einstein Condensate in an Optical Lattice: Analogy to Uniformly Frustrated Josephson-Junction Arrays
J. Low Temp. Phys. 150, 593 (2008).

[12] K. Kasamatsu and M. Tsubota
Dynamic Properties of Vortices in a Bose-Einstein Condensate in a Rotating Lattice
J. Low Temp. Phys. 148, 357 (2007).

[11] H. Takeuchi, K. Kasamatsu, and M. Tsubota
Vortex Structures in Rotating Two-component Bose-Einstein Condensates in an Anharmonic Trapping Potential　
the AIP Conference Proceedings series 850, 57 (2006).

[10] K. Kasamatsu and M. Tsubota
Modulation Instability and Pattern Formation in Two-Component Bose-Einstein Condensates
J. Low Temp. Phys. 138, 669 (2005).

[9] M. Tsubota and K. Kasamatsu
Dynamics of Quantized Vortices in Superfluid Helium and Rotating Bose-Einstein Condensates
J. Low Temp. Phys. 138, 471 (2005).

[8] K. Kasamatsu, M. Tsubota, and M. Ueda
Vortex States of Two-Component Bose-Einstein Condensates with and without Internal Josephson Coupling
J. Low Temp. Phys. 134, 719 (2004).

[7] K. Kasamatsu, M. Tsubota
Collective Shape Oscillation and Domain Formation of Two-Component Bose-Einstein Condensates
J. Low Temp. Phys. 134, 677 (2004).

[6] K. Kasamatsu, M. Tsubota, and M. Ueda
Structure of vortex lattices in rotating two-component Bose-Einstein condensates
Physica B, Physica B 329-333, 23 (2003).

[5] M. Tsubota, K. Kasamatsu, and M. Ueda
Dynamics of vortex lattice formation in a rotating Bose-Einstein condensate
Physica B, 329-333, 21 (2003).

[4] M. Tsubota, K. Kasamatsu, and M. Ueda
Vortex Nucleation and Array Formation in a Rotating Bose-Einstein Condensate
J. Low Temp. Phys, 126, 461 (2002).

[3] K. Kasamatsu, Y. Yasui, and M. Tsubota
Macroscopic Quantum Tunneling of Two-component Bose-Einstein Condensates
J. Low Temp. Phys, 126, 437 (2002).

[2] K. Kasamatsu and M. Tsubota
Vortex Generation in Cyclically Coupled Superfluids and Kibble-Zurek Mechanism
J. Low Temp. Phys, 126, 315 (2002).

[1] M. Tsubota and K. Kasamatsu
Josephson current flowing in three cyclically coupled superfluids
Physica B, 284-288, 59 (2000).