The transition temperature of these systems is proportional to the particle
The transition temperature of these systems is proportional to the particle density divided by the Riemann zeta function, all to the two-thirds power. Vortices in them are allowed via the psi-squared term in the equation describing the wavefunction of these systems. Sweeping a magnetic field through one of these causes spin-flip collisions and the Feschbach resonance, while further increasing the field causes an implosion followed by an explosion in a namesake type of nova. Their wavefunction is described by the Gross-Pitaevskii equation. They were first created by Cornell, Wieman, and Ketterle by laser-cooling a bunch of rubidium atoms. For 10 points, name this system consisting of a bunch of degenerate ultracold bosons.
The transition temperature of these systems is proportional to the particle density divided by the Riemann zeta function, all to the two-thirds power.
 {Bose}-Einstein condensates [{or BECs}]