Professor Eden Figueroa

Distributed Quantum Processing: The Next Quantum Frontier

In this introductory talk we will celebrate the achievements of the local Stony Brook quantum community over the last few decades. We will also look at the next frontiers in quantum science that the Center for Distributed Quantum Processing will target in the next five years. From quantum networks to interconnected quantum processors, we will describe the roadmap to develop first applications of the quantum internet of things.

Professor Tzu-Chieh Wei 

Quantum information processing, applications, and benchmarking cloud quantum processors

In this talk, I will review some of our recent activities in developing quantum algorithmic tasks for processing information and performing computation, such as projecting a quantum system to its eigenstates, computing lowest energies for small molecules, and estimating certain topological features of complexes. I will then elaborate on one example where we benchmarked cloud quantum processors in simulating ground states of a many-qubit system. In addition to these individual-processor considerations, I will also discuss a hypothetical quantum broadcasting senario, where we can distribute interesting quantum states to perform a form of blind computation, and end with a lookout into theoretical directions that will be explored for distributed quantum processing.

Professor Dominik Schneble

Approaching Light-Matter Interactions through Quantum Simulations with Ultracold Atoms

Understanding and harnessing interactions between light and matter on the quantum level is central for the development of photon-based QIST. One example is the emergent paradigm of waveguide quantum electrodynamics (wQED), which investigates the coherent coupling between one or more quantum emitters and an engineered, low-dimensional photonic bath. We have recently developed an unconventional wQED platform in which artificial quantum emitters, based on ultracold atoms in an optical lattice, radiate atomic matter waves, rather than photons, into the surrounding vacuum. I will introduce the unique capabilities of our analogue quantum simulation platform and discuss some recent work on accessing atom-light interactions in unconventional regimes, at the boundary between quantum optics and condensed-matter physics.

Professor Dmitri Kharzeev

Unraveling Real-Time Dynamics of Field Theories with Quantum and Classical Computers

Most problems in physics involve real-time dynamics, and are usually quite challenging when several degrees of freedom are involved. Relativistic quantum field theory, with its infinite number of degrees of freedom, presents an ultimate challenge for theoretical understanding. This challenge can be addressed by using quantum simulations. I will present some examples of advances made  in the understanding of real-time dynamics in (1+1) dimensional quantum field theories.

Professor Qiang Li

Quantum Materials Frontiers

Quantum information science and technology (QIST) is a rapidly evolving field with a wide range of hardware implementations. For an example, in quantum computing, we have superconducting qubits, trapped ions, quantum dots, color centers, topological protected systems, and so on. Although the fundamental principles underlying quantum computing is the same, there are profound differences in the operation and the materials platform on which quantum systems are constructed. In this presentation, I will first discuss the challenges and opportunities in quantum materials frontiers for QIST. Then, I will highlight some of our experimental efforts on quantum materials and quantum phenomena in CDQP at Stony Brook University from chiral qubits and quantum transduction to candidate materials for topological superconductivity and quantum spin liquid.

Professor Ash Kumar

Quantum Engineering with Rydberg Atoms Coupled to Superconducting Resonators

Due to their inherent strong and controllable interactions, Rydberg atoms have recently emerged as a powerful platform for quantum science. Due to their large size, they also interact strongly with millimeter-wave and microwave photons. In this talk, I will show how coupling atoms to superconducting resonators at these frequencies enables engineering of novel, hybrid quantum devices, and opens the door to new opportunities in cavity quantum electrodynamics. In particular, as a step towards quantum networking, I will show how they have been used to transduce individual millimeter-wave photons to optical photons with state-of-the-art performance. I will conclude by describing the exciting opportunities in quantum computing and many-body physics opened by this platform, enabled by the strong non-local photon mediated interactions between atoms.

Dr. Guodong Cui

Photon-Photon Nonlinearities

Photon-photon nonlinearity, fundamental to quantum physics and pivotal for applications in quantum information like photon heralding and gates, is the focal point of our research. This talk will outline our approach to such nonlinearity, centering on a novel platform that facilitates Kerr type interactions between photons from two optical cavities intersecting at a cold atomic cloud. A discussion on the recent theoretical and experimental advancements in this system will be presented, emphasizing our methodology and revealing its potential to significantly shape the future trajectory of quantum information research.

Youngshin Kim

Formation of Matter-Wave Polaritons in an Optical Lattice

Strong light-matter coupling can lead to the formation of a quasiparticle known as a polariton, which has been exploited to achieve a superfluid state of light as well as strongly correlated phases in photonic quantum systems. In this talk, we show how an ultracold-atom analog of a polariton can be implemented in a tunable and dissipation-free system of an optical lattice, using atomic matter waves and lattice excitations instead of light and matter. Our work opens up novel possibilities for simulating polaritonic quantum matter, which we demonstrate in a spectroscopic measurement of the polariton band structure and in a study of transport behavior across the superfluid and Mott-insulating phases.

Dr. Kazuki Ikeda

New Quantum Phenomena Found by Quantum Simulation

Current quantum computation has various limitations, but provides us with excellent motivation to study simpler models. While one of our ultimate goals is to understand quantum correlations in 3+1 dimensional QCD through quantum computation, we also explore various new phenomena through quantum simulations of 1+1 dimensional QED. In this talk, I will present some implications for new quantum phenomena that we have obtained through quantum simulations of the 2d QED and their applications to nuclear physics and condensed matter physics.

Dr. Sonali Gera

Towards Memory-Assisted Bell State Measurements

We report on progress towards achieving entanglement swapping between independent cavity-enhanced entanglement sources that are tuned for quantum memory operation. Together with quantum memories, we envision the demonstration of a Type II quantum repeater.