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 
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}]