The nonequilibrium dynamics of vortices in two-dimensional quantum fluids can be predicted by accounting for the way which vortex ellipticity is coupled to gradient background fluid density. In absence nonlinear interactions, a harmonically trapped analyzed analytically show that single will move an elliptic trajectory has same orientation and aspect ratio as projection itself. This allows esti...

We report a scheme for generation of high-order vortex states using two-mode photon-number squeezed states, generated via the non-linear process Spontaneous Parametric Down Conversion. By applying parametric rotation in quadrature space $(X,Y)$, $\phi$ converter, Gaussian profile input state can be mapped into superposition Laguerre-Gauss modes with $N$ vortices or singularities, an containing ...

We investigate the phenomenon of decay of a supercurrent in a superconducting thin film in the absence of an applied magnetic field. The resulting zero-temperature resistance derives from two equally possible mechanisms: 1) quantum tunneling of vortices from the edges of the sample; and 2) homogeneous quantum nucleation of vortex-antivortex pairs in the bulk of the sample, arising from the inst...

Presented are quantum simulation results using a measurement-based quantum lattice gas algorithm for Navier-Stokes fluid dynamics in 2+1 dimensions. Numerical prediction of the kinematic viscosity was measured by the decay rate of an initial sinusoidal flow profile. Due to local quantum entanglement in the quantum lattice gas, the minimum kinematic viscosity in the measurement-based quantum lat...

Superfluid flow is a manifestation of quantum mechanics at the macroscopic level. Phenomena like dissipationless flow and persistent currents can be traced back to the existence of a macroscopic wavefunction. The gradient of its phase gives the superfluid velocity. However, superfluid flow is only stable below a critical velocity. Above this velocity, excitations of the fluid can be generated, ...

The authors construct an analogy between bosonic superfluid vortices carrying quantum impurity atoms and chemistry, revealing the possibility of covalent bonds, bonding anti-bonding states spectral level crossings.