Videos of Past Q-FARM Seminars

Tutorial: Search for Non-Abelian Majorana particles as a route to topological quantum computation

Majorana zero modes are fermion-like excitations that were originally proposed in particle physics by Ettore Majorana and are characterized as being their own anti-particle.

Quantum criticality in transition metal dichalcogenides

I will discuss low temperature transport measurements on twisted bilayers of WSe2, where we see evidence for an electron-correlation driven insulating phase at half filling of the lowest moiré subband. 

Two Talks

Talk #1: Here we present the realization of optical lattices with sound, using a Bose-Einstein condensate coupled to a confocal optical resonator.  Talk #2: Tunable interactions are an essential component of flexible platforms for quantum simulation and computation.  While most physical systems rely on local interactions dictated by the...

Time Crystals in Open Systems

In this talk, I will describe recent advances, surrounding the idea of time translation symmetry breaking --- the resulting discrete time crystal exhibits collective subharmonic oscillations.

Emergent quantum randomness and its application for quantum device benchmarking

In this talk, we describe a novel, universal phenomenon that occurs in strongly interacting many-body quantum dynamics beyond the conventional thermalization.

Double Feature: Memory and optimization with multimode cavity QED; Transverse-Field Ising Dynamics by Rydberg Dressing in a cold atomic gas

In this first talk, I will describe how a driven-dissipative system is realized by coupling ultracold atoms to a multimode optical cavity and how it can perform various computational tasks. 

In this second talk, we will present a realization of long-range optically-controllable Ising interactions in a cold gas of cesium atoms by Rydberg dressing.

Quantum probes of two-dimensional materials

Spin qubits based on diamond NV centers can detect tiny magnetic fields; thin two-dimensional materials produce tiny magnetic fields.  Do they make a good match?  I will discuss two works that explored how NV magnetometry can uniquely probe the spins and currents in crystals that are ...

Double Feature: A photonic quantum computer design with only one controllable qubit; Towards MEMS-driven photonic computing

Talk #1: We describe a design for a photonic quantum computer which requires minimal quantum resources: a single coherently-controlled atom.

Talk #2: Programmable nanophotonic networks of Mach-Zehnder interferometers are energy-efficient circuits for matrix-vector multiplication that benefit a wide variety of applications such as artificial intelligence, quantum computing and cryptography.

Continuous variables quantum complex networks

Experimental procedures based on optical frequency combs and parametric processes produce quantum states of light involving large numbers of spectro-temporal modes that can be mapped and analyzed in terms of quantum complex networks.

Double Feature: Ultra-low-power second-order nonlinear optics on a chip; Quantum Dynamics of Ultrafast Nonlinear Photonics

Talk #1: Thin-film lithium niobate is a promising platform for integrated photonics because it can tightly confine light in small waveguides which allows for large interactions between light, microwaves, and mechanics.

Talk #2: Broadband optical pulses propagating in highly nonlinear nanophotonic waveguides can significantly leverage optical nonlinearity by tight temporal and spatial field confinements, promising a route towards all-optical quantum engineering and information with single-photon nonlinearities.

Quantum sensing with unlimited optical bandwidth

Squeezed light is a major resource for quantum sensing, which has been already implemented in high-end interferometric sensing, such as gravitational wave detection. However, standard squeezed interferometry methods suffer from two severe limitations.

Unconventional computing with liquid light

The recent advances in the development of physical platforms for solving combinatorial optimisation problems reveal the future of high-performance computing for quantum and classical devices.

Coupling diamond defects to high-finesse optical microcavities

Defect centers in diamond can offer atomic-like optical transitions and long-lived spin degrees of freedom.

Direct laser cooling of polyatomic molecules

Laser cooling and evaporative cooling are the workhorse techniques that have revolutionized the control of atomic systems.

Towards quantum and classical light sources and transducers at any wavelength using nonlinear nanophotonics

Nanophotonics provides the unprecedented opportunity to engineer nonlinear optical interactions through the nanometer-scale control of geometry provided by modern fabrication technology.

Lattice atom interferometry in an optical cavity

Atom interferometers are powerful tools for both measurements in fundamental physics and inertial sensing applications.