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Counterflow Quantum Turbulence and the Instability in Two-component Bose-Einstein Condensates

S. Ishino, H. Takeuchi, M. Tsubota

arXiv:1006.4488Journal of Low Temperature PhysicsDec 15, 20104 citations

Theoretical study of dynamics of quantized vortices in two-dimensional two-component miscible Bose-Einstein condensates

俊植韓

Mar 24, 20220 citations

Binary Quantum Turbulence Arising from Countersuperflow Instability in Two-Component Bose-Einstein Condensates

Hiromitsu Takeuchi, Shungo Ishino, Makoto Tsubota

We theoretically study the development of quantum turbulence from two counter-propagating superfluids of miscible Bose-Einstein condensates by numerically solving the coupled Gross-Pitaevskii equations. When the relative velocity exceeds a critical value, the countersuperflow becomes unstable and quantized vortices are nucleated, which leads to isotropic quantum turbulence consisting of two superflows. It is shown that the binary turbulence can be realized experimentally in a trapped system.

arXiv:1008.4664Physical Review LettersNov 10, 201098 citations

Countersuperflow instability in miscible two-component Bose-Einstein condensates

Shungo Ishino, Makoto Tsubota, Hiromitsu Takeuchi

We study theoretically the instability of countersuperflow, i.e., two counterpropagating miscible superflows, in uniform two-component Bose-Einstein condensates. Countersuperflow instability causes mutual friction between the superfluids, causing a momentum exchange between the two condensates, when the relative velocity of the counterflow exceeds a critical value. The momentum exchange leads to nucleation of vortex rings from characteristic density patterns due to the nonlinear development of the instability. Expansion of the vortex rings drastically accelerates the momentum exchange, leading to a highly nonlinear regime caused by intervortex interaction and vortex reconnection between the rings. For a sufficiently large interaction between the two components, rapid expansion of the vortex rings causes isotropic turbulence and the global relative motion of the two condensates relaxes. The maximum vortex line density in the turbulence is proportional to the square of the relative velocity.We study theoretically the instability of countersuperflow, i.e., two counterpropagating miscible superflows, in uniform two-component Bose-Einstein condensates. Countersuperflow instability causes mutual friction between the superfluids, causing a momentum exchange between the two condensates, when the relative velocity of the counterflow exceeds a critical value. The momentum exchange leads to nucleation of vortex rings from characteristic density patterns due to the nonlinear development of the instability. Expansion of the vortex rings drastically accelerates the momentum exchange, leading to a highly nonlinear regime caused by intervortex interaction and vortex reconnection between the rings. For a sufficiently large interaction between the two components, rapid expansion of the vortex rings causes isotropic turbulence and the global relative motion of the two condensates relaxes. The maximum vortex line density in the turbulence is proportional to the square of the relative velocity.

arXiv:1106.0884Physical Review AJun 3, 201154 citations

Characteristics and Perspectives of Quantum Turbulence in Atomic Bose-Einstein Condensates

Vanderlei Salvador Bagnato, R. F. Shiozaki, Jorge Amin Seman +8 more

Springer series in solid-state sciencesJan 1, 20131 citation

Vortex Nucleation and Transition to Turbulence in two-component Bose—Einstein condensates

Shungo Ishino, Makoto Tsubota, Hiromitsu Takeuchi

We theoretically study the instability of countersuperflow, i.e. , two counter-propagating miscible superflows, in uniform two-component Bose-Einstein condensates. When the relative velocity of the counterflow exceeds a critical value, the instability causes the nucleation and expansion of vortex rings. A lot of vortex reconnections are caused and lead to binary quantum turbulence, where both components become turbulent. Then we introduce the unique velocity in two-component Bose-Einstein condensates and investigate the probability distribution of the velocity in the binary quantum turbulence to obtain the probability distribution whose tail in the high-velocity region is considerably suppressed compared to single-component quantum turbulence.We theoretically study the instability of countersuperflow, i.e. , two counter-propagating miscible superflows, in uniform two-component Bose-Einstein condensates. When the relative velocity of the counterflow exceeds a critical value, the instability causes the nucleation and expansion of vortex rings. A lot of vortex reconnections are caused and lead to binary quantum turbulence, where both components become turbulent. Then we introduce the unique velocity in two-component Bose-Einstein condensates and investigate the probability distribution of the velocity in the binary quantum turbulence to obtain the probability distribution whose tail in the high-velocity region is considerably suppressed compared to single-component quantum turbulence.

Journal of Physics Conference SeriesDec 17, 20120 citations

Quantum Turbulence Arising from Countersuperflow Instability in Miscible Two-component Bose-Einstein Condensates

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