We use laser cooling and trapping techniques to produce ultracold gases of lithium atoms. These gases can be used to study exotic phases of matter and spin systems far from equilibrium.

Plain-language explanation

Lab Space and Equipment

Our facilities and tools

 electronic components on a PCB

Lithium Spectroscopy

We use a vapor cell containing heated lithium metal and a small amount of inert buffer gas. Using saturated absorption spectroscopy, we stabilize the wavelength of the laser to one of the resonance features, giving the laser system long-term stability.

To avoid magnetic fields created by current in the heater wires, we use a counter-wrapped pattern (pictured below) outside a mu-metal shield around the vacuum chamber.

nichrome wire wrapped around heat pipe
a heat-treated vacuum flange
a prototype electromagnet being tested
an electronic circuit
two nickel-plated copper parts and one unplated copper part

Laser Cooling & Trapping

The basics of making laser-cooled atomic gases

red laser and optics

Exotic Quantum Phases

Quantum Simulation, Many-body states

spin density difference maps indicate phase separation

Spin Dynamics

Fermion systems far from equilibrium

collective spin dynamics waterfall plot