A fundamental goal of strong interaction physics is to describe and interpret scattering experiments from first principles quantum chromodynamics (QCD) and to understand the internal structure of nuclei. However, the complexity of QCD, particularly in its non-perturbative regime, presents major challenges. Classical computing techniques, while driving substantial progress, have inherent...
By leveraging many years of development by the materials science, quantum computing, astronomy, and AMO communities, we have entered an era where practical precision experiments are possible (and already taking data) in subatomic physics with superconducting sensors. These devices are characterized by their exceptionally high energy resolution and low thresholds for the detection of various...
We present an efficient quantum circuit for block encoding a pairing Hamiltonian often studied in nuclear physics. Our block encoding scheme does not require mapping the creation and annihilation operators to the Pauli operators and representing the Hamiltonian as a linear combination of unitaries. Instead, we show how to encode the Hamiltonian directly using controlled swap operations. We...
A synthetic dimension, in which a discrete degree of freedom in a well-controlled quantum system can be mapped to the states of particles moving in a real-space lattice potential, is a powerful tool for quantum simulation because it provides control over the Hamiltonian and the ability to create configurations difficult to access in real space. I will describe the creation of a synthetic...
We propose a protocol for the generation of effective universal nonlinear Kerr Hamiltonians in a collective-spin system coupled to bosonic modes of a cavity QED apparatus. We expand the effective collective spin Hamiltonian beyond the second-order term (the well-studied one-axis-twisting) and map it to an effective Kerr Hamiltonian using the Holstein-Primakoff transformation. We give examples...
We have pioneered quantum machine learning to make a breakthrough in quantum machine learning on the target of particle physics data challenges. We have investigated from quantum support vector machines of collision event classification to quantum anomaly detection on novel event discovery. We will share our success and failure and outlook of upcoming quantum centric supercomputing.
Spin-boson models are common throughout physics. Trapper ion quantum computers are built off internal degrees of freedom in the ions (qubits) and external degrees of freedom (phonons). For quantum computation, the phonons are used as an information bus for generating entanglement between qubits, but are not used to store quantum information. We have recently used the spin and motional modes to...
Analog quantum simulators are purpose-built devices that imitate the behavior of complex quantum systems. Compared to universal error-corrected digital quantum computers, they are expected to have less stringent requirements, and are capable of natively representing the degrees of freedom and interactions in the target system with reduced overhead. In this talk, I will present our recent work...
The strong force in nature, described by the theory of quantum chromodynamics (QCD), governs the interaction of quarks and gluons, which constitute the main building blocks of the visible universe. Since its development over five decades ago, various fundamental questions have remained unanswered despite significant theoretical and experimental efforts: How do the dynamics of quarks and gluons...
Recent progress in quantum computing offers promising opportunities to address computational challenges in lattice gauge theories, particularly for real-time dynamics and scattering amplitudes that are inaccessible through classical methods like lattice QCD due to limitations such as the sign problem. This talk focuses on the use of measurement-based photonic quantum processors to calculate...
The many internal quantum states (vibrational, rotational, hyperfine, parity) of molecules add complexity to experiments but in exchange offer opportunity. Fr instance, the current best limit on the electron’s electric dipole moment was set in a trapped-molecule experiment, and prospects for finding new CP-violating physics in radioactive molecules are excellent. I’ll review some of this...
Central spin systems are ubiquitous, naturally occurring in a variety of physical systems, including rare-earth ions in nuclear spin-rich crystals and atomic-scale defects in two-dimensional materials. Here, we present novel quantum control methods for probing and manipulating a central spin system, where an optically addressable single electron spin is surrounded by an inaccessible dark...
Progress in quantum computing with neutral atom qubits has advanced rapidly with the development of large 2D arrays and high fidelity entangling gates. We have used an array of Cs atom qubits to demonstrate a variational simulation of the Lipkin-Meshkov-Glick model incorporating noise mitigation techniques. In further work we have used a small error detecting code to implement a prototype...
The propagation of optical waves is traditionally understood as two distinct processes: beam (spatial) and pulse (temporal) propagation. However, spatiotemporal three-dimensional (3D) wave packets—featuring unique combinations of spatial and temporal wave characteristics—open the door to novel phenomena. In this seminar, we will explore the progress made in understanding these 3D optical wave...
Ionizing radiation has been shown to reduce the performance of superconducting quantum circuits. In this talk, I will first provide an overview of this rapidly evolving area of research, up to the implications of the latest demonstration of quantum error correction gains by Google. I will provide an overview of some of our recent work that identifies potentially problematic sources of...
Our group at the University of Colorado Boulder (CU Boulder) and the National Institute of Standards and Technology (NIST) has over a decade of experience in developing quantum calorimeters based on the superconducting transition-edge sensor (TES). More recently, we have began exploring the calorimetric capabilities of the kinetic inductance detector (KID), a superconducting resonator...
We analyze the quasiparton distributions of the lightest meson in massive QED2. For increasing rapidity, we compute the spatial quasiparton distribution functions and amplitude for the lowest excited state numerically both at strong and weak coupling and compare them to light front results in the lowest Fock space approximation. Moreover, we introduce the concept of the quark...
In this presentation, we explore near-term quantum algorithms designed to prepare optimal quantum states for applications in quantum sensing and metrology. These algorithms can be tailored for implementation on noisy intermediate-scale quantum (NISQ) devices. Specifically, we examine the variational quantum algorithms to estimate the quantum Fisher information for this task and highlight their...
We present the quantum simulation of the frustrated quantum spin-1/2 antiferromagnetic Heisenberg spin chain with competing nearest-neighbor (𝐽1) and next-nearest-neighbor (𝐽2) exchange interactions in the real superconducting quantum computer with qubits ranging up to 100. In particular, we implement the Hamiltonian with the next-nearest neighbor exchange interaction in conjunction with the...
The development of optomechanical systems—in which the motion of a massive object is controlled and measured using light—has revolutionized the detection of tiny forces over the past few decades. As such technologies reach, and even surpass, quantum measurement limits, they can enable the detection of tiny forces relevant in nuclear physics. I will present results from a recent...
I will present an overview of the ways that some AMO researchers working in quantum information find connections to nuclear physics, as well as a wish list from the AMO side.
Laser-based measurement and control of atomic and molecular states form the foundation of modern quantum technology and provide deep insights into fundamental physics. In this talk, I'll present our work in JILA on quantum-state-resolved thorium-229 nuclear laser spectroscopy using a coherent frequency comb in the vacuum-ultraviolet. I will also discuss our recent effort producing thin-film...
I will present quantum simulation of Deep Inelastic Scattering in (1+1)-dimensional QED.
Probing the non-equilibrium and real-time dynamics of composite particles, such as hadrons and nuclei, is an overarching goal for quantum simulators. Observations of confinement and composite excitations in spin systems have enabled the exploration of string-breaking and scattering dynamics with analog quantum simulators. In this talk, I will discuss our recent proposal for meson scattering...
How can quantum field theory advance superconducting device capabilities? How can superconducting devices probe quantum field theory? I will discuss these questions in the context of recent work on fluxonium, a superconducting quantum circuit used as a qubit. I will present a numerical framework for optimizing qubits, as well as a lattice field theory of physical devices. The discussion around...
