Quantum Computation and Quantum Field Theory
We will discuss the path towards using quantum computers for quantum field theory calculations. In particular, two problems will be addressed: how to truncate the Hilbert space of bosonic fields and how to take the continuum limit without incurring in exponentially large costs. We will discuss the particular case of the non-linear sigma model, where those questions are fully understood, followed by gauge theories, where those questions remain fairly open.
Assembling and Probing Highly Entangled Quantum Matter with Superconducting Circuits
Superconducting circuits are a powerful platform for quantum computation and sensing. In this talk I will show how we can use techniques from those domains to create and interrogate strongly interacting matter from microwave photons. In particular we discuss how disorder can be leveraged to assemble compressible quantum fluids. Using correlation measurements we can can observe photon fermionization.
Zhaohui Ma
Zhaohui Ma is a postdoctoral researcher working at NIST and UMD. He received a B.S. in Applied Physics from Shaanxi University of Science and Technology and earned his PhD in Physics from the Stevens Institute of Technology, where his dissertation focused on nonlinear frequency conversion and quantum light generation in the thin film lithium niobate platform. Currently, he is working on topics involving nonlinear wave mixing and electro-optic effects in photonic integrated circuits.
CANCELLED - Glasses: From Physical Hamiltonians to Neural Networks and Back
Abstract: This talk will review our recent work on classical and quantum glasses. I will start with a discussion of spin glasses from the perspective of chaos theory.
New JQI Fellow Brings Laser Focus to Quantum Research into Chemistry
Lasers are often misunderstood, according to chemical physicist and JQI Fellow Yu Liu. “People usually think of lasers as heating things up, but if you use the right frequency of lasers and target the right type of atoms, you can actually take energy away,” Liu says. This technique—laser cooling—is his specialty.
Developing a strong driving toolkit for Floquet systems with superconducting qubits
Dissertation Committee Chair: Alicia Kollár
Committee:
Ben Palmer
Steven Rolston
Nathan Schine
Ron Walsworth (Dean’s Rep)
Experimental observation of symmetry-protected signatures of N-body interactions
Characterizing higher-order interactions in quantum processes with unknown Hamiltonians presents a significant challenge. This challenge arises, in part, because two-body interactions can lead to an arbitrary evolution, and two-local gates are considered universal in quantum computing. However, recent research has demonstrated that when the unknown Hamiltonian follows a U(1) symmetry, like charge or number conservation, N-body interactions display a distinct and symmetry-protected feature called the N-body phase.