Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-04-19
Physics
High Energy Physics
High Energy Physics - Theory
19 pages, no figure
Scientific paper
In the Seiberg-Witten limit, the low-energy dynamics of N weakly coupled identical open strings on a D3-brane can behave as two-dimensional incompressible hydrodynamics. Classical vortices are frozen in the fluid and described by an action expressed in terms of two canonical conjugate fields, which can be taken as the new space coordinate. The noncommutative space naturally arises when this pair of conjugate fields are quantized. To the lowest order of $\hbar$, the vorticity can replace the background $B$-field on the D3 brane, thereby yielding a spatially and temporally varying noncommutative parameter $\theta^{ij}$. Demanding a quantum area-preserving transformation between two classical inertial-frame coordinates, we identify the classical solitons that survive in the noncommutative space, and they turn out to be the "electric field" solutions of the Dirac-Born-Infeld Lagrangian created by a $\delta$-function source. The strongly magnetized electron gas in a semiconductor of finite thickness is taken as a case study, where similar quantum column vortices as those in a D3 brane can be present. The electric charges contained in these electron-gas column vortices are quantized, but in a way different from those in the sheet vortices that produce the fractional quantum Hall effect.
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