Interesting Movies

The quantum mechanical and topological systems explored in the Simon Lab can be complex, but we feel strongly that an important part of science is communication. To this end, we have developed some animations, primarily for our talks, that aim to share the ideas underlying our science in the simplest, most accessible terms possible.

SimonLab Mannequin Challenge

Have you ever wondered what a day in the life of a quantum manybody optometrist looks like? Watch this quick clip to find out!

Matter made of Light: Mott Insulators and Topological Fluids

In this talk, Jon introduces the group's recently-created photonic Laughlin molecules, and highlights their connections to reservoir engineering techniques recently developed in a circuit QED collaboration with the SchusterLab.

Nathan's Tesla Coil Plays The New Years Song

Dr. Nathan Schine, now a postdoc with Adam Kaufman at JILA Boulder and previously a doctoral student in SimonLab, plays Auld Lang Syne on his tesla coil.

Topological Physics in Curved Space

This is a recent talk from Jon exploring topological physics in curved space, along with Rydberg Polaritons in optical cavities as a platform for topological quantum materials.

Topological Light

What a topological state of atoms and photons looks like.

Chiral Edge Dynamics in a Superconducting Circuit

In a 2D lattice of tunnel-coupled 3D microwave cavities, light undergoes chiral dynamics on the system edge due to the topological band-structure of the model. The extremely low loss of this model is reflected in the repeated circumnavigation of the light a round the system perimeter. The lack of back-scattering is evidence of the topological protecction of the Chern bands.

A Weyl Semi-Metal circuit

This is a recent talk from Leon Lu introducing our newest topological meta-material, an RF circuit that behaves as a Weyl semi-metal!

Vortex Beam Evolution in the Lowest Landau Level

Holographically reconstructed cavity transmission as we tune our near-degenerate twisted resonator through the lowest Landau level, for a vortical input state.

Twisting a Periscope Produces a Synthetic Magnetic Field for Light

As we twist a periscope, the image it produces rotates; this may be understood as a dove prism, but the important point is this: adding two more mirrors to close the path results in a round-trip image rotation, which turns the lab frame into a rotating frame.

Wrapping 1/3 of the Plane onto a Cone

One of the simplest tests of whether a surface has gaussian curvature is whether it can be created by rolling up a flat sheet. Here we demonstrate that a sheet corresponding to a third of the plane can be rolled up into a cone; a conical surface thus lacks gaussian curvature (it is FLAT) everywhere but at the cone-tip, which cannot be made out of a flat sheet.

Cyclotron Orbit Near a Conical Defect

A particle in a magnetic field undergoes cyclotron orbits; if the global topology of the surface is changed to that of a cone, very little happens for orbits away from the cone tip; this is because, as shown above, a conical surface is flat, in the sense that it lacks gaussian curvature. The cone _tip_, however, is a singularity of gaussian curvature, and perturbs the orbits strongly. This is the origin of the Wen-Zee action.

Cyclotron Orbits on a Conical Surface

Tracing many orbits as a sheet is wrapped into a cone reveals that orbits away from the tip remain the same size, while the orbit that encircles the tip becomes smaller; this is a clear indication that the local density of states is higher at the cone tip, which is the principal manifestation of the Wen-Zee action. How much higher, and how this density is distributed, are properties of the particular topological state being explored, and are directly reflected in the mean orbital spin and central charge of this state.

Twisting a Four-Mirror Resonator

When a four-mirror Fabry-Perot resonator is twisted out of the plane, the photons within it experience a round-trip image-rotation, turning the lab frame into a rotating frame. This physics may be understood as introducing coriolis and centrifugal forces on the photon, akin to Lorentz forces and harmonic anti-trapping of an electron in a magnetic field.

Tracing rays in a resonator-analog of a LLL on a Cone

By twisting the resonator past the point where harmonic confinement precisely cancels centrifugal anti-confinement, we produce a resonator which exhibits three simultaneous cyclotron orbits, offset by 120 degrees from one another. This is precisely the physics of Landau levels on a cone: dynamics in flat space, with edges of the 1/3 of the plane identified with one another.

Photon-Photon Interactions

In a parallel effort, we are inducing photons to interact with one another using cavity-Rydberg-Electromagnetically-Induced-Transparency. In this effect, a single photon passing through a properly dressed atomic medium changes the index of refraction of that medium so strongly that any other photon passing through simultaneously is substantially lensed. This effect, in conjunction with the Landau-levels explored above, will allow us to create topological few-to-many body states composed of photons, rather than electrons.

Doppler Decoherence of a Polariton

Interactions between photons are mediated by an admixed collective Rydberg excitation whose spatial structure mirrors (no pun intended) that of the optical field. As the atoms move (due to their temperature) this spatial structure in the collective atomic excitation washes out, as shown here. This leads to cross-thermalization between atomic and optical degrees of freedom.

Photonic Chern Insulator Dynamics

We have built a time-reversal broken topological photonic crystal, composed of an array of tunnel-coupled re-entrant resonators. This animation shows the evolution of a pulse injected on the edge of such a system, within an energetic band-gap; the observed chiral, back-reflection-free dynamics are a direct signature that the (LTI) system under examination exhibits Chern bands.

Geometry of Coupled Re-entrant Microwave Cavities

The geometry of a pair of the tunnel-coupled re-entrant microwave resonators employed for our Chern insulator work. These low-loss resonators do not require a lid, and can operate at extremely high-Q in the superconducting regime, making them excellent tools for integration with Josephson junctions for exploration of topological manybody physics.

Chiral Resonator Mode Profile

In the presence of a Yttrium-Iron-Garnet (YIG) sphere, the modes of the three-post cavities split, with a single chiral mode remaining unshifted by the YIG. This movie shows the time evolution of the B-field corresponding to this mode.

Mean Field Vortex Decay

Decay of a Mean-Field Vortex in the Lowest Landau Level on a Cone. Mean Field physics in the LLL is accessible by reducing the interaction strength and increasing the photon number.

UChicago Campus Ride

Sometimes it's important to get out of lab and enjoy the beauty of Hyde Park and the UChicago Campus. A Boosted Board helps.