Giant Artificial Atoms and Molecules: Chiral (Directional) Photon Emission via Waveguide QED
Abstract: In this talk, we present a demonstration of “giant artificial atoms” realized with superconducting qubits in a waveguide QED architecture. The superconducting qubits couple to the waveguide at multiple, well-separated locations. In this configuration, the dipole approximation no longer holds, and the giant atom may quantum mechanically self-interfere. Multiple, interleaved qubits in this architecture can be switched between protected and emissive configurations, while retaining waveguide-mediated qubit-qubit interactions.
Fundamental Physics and Quantum Science with Polyatomic Molecules
Abstract: Polyatomic molecules uniquely enable the simultaneous combination of multiple features advantageous for precision measurement and quantum science. Searches for fundamental symmetry violations benefit from large internal molecular fields, high polarizability, internal co-magnetometry, and the ability to cycle photons - all of which can be found in certain engineered polyatomic species. We discuss experimental and theoretical developments in several linear metal hydroxide (MOH) species, including spectroscopy, photon cycling, andquantum control.
Hamiltonian engineering of spin-orbit–coupled fermions in an optical lattice clock
Abstract: Harnessing the behavior of complex systems is at the heart of quantum technologies. Precisely engineered ultracold gases are emerging as a powerful tool for this task. In this talk I will explain how ultracold alkaline-earth atoms (AEAs) trapped by light used to create optical lattice clocks are not only fascinating, but of crucial importance since they can help us to answer cutting-edge questions about complex many-body phenomena and magnetism.
Probing critical states of matter on a quantum computer
Abstract: I will describe Quantinuum’s trapped ion QCCD quantum computers, with a particular focus on the key technical challenges and solutions for realizing mid-circuit measurement and reuse of qubits. In addition to the importance these capabilities play in quantum error correction, they also afford remarkable efficiencies in simulating many-body physics, enabling explorations of physics at length scales well beyond the limits that would be naively guessed from the size of present-day quantum computers.
CANCELLED: Quantum super impulses
Abstract: A quantum impulse is a brief but strong perturbation that produces a sudden change in a wavefunction.
Measuring the knots & braids of non-Hermitian oscillators
Abstract: It may seem unlikely that rich mathematical structures remain to be uncovered in classical harmonic oscillators. Nevertheless, systems that combine non-reciprocity and loss have provided a number of surprises in recent years. I will describe how these systems naturally exhibit braids, knots, and other topological structures. I will also present measurements of these structures (using a cavity optomechanical system), and will describe their potential application in various control schemes.
CANCELLED: Programmable control of indistinguishable particles: from clocks to qubits to many-body physics
Abstract: Quantum information science seeks to exploit the collective behavior of a large quantum system to enable tasks that are impossible (or less possible!) with classical resources alone. This burgeoning field encompasses a variety of directions, ranging from metrology to computing. While distinguished in objective, all of these directions rely on the preparation and control of many identical particles or qubits. Meeting this need is a defining challenge of the field.
Quantum metrology with a trapped atom interferometer interrogated for one minute
Abstract: Precise control of quantum states allows atom interferometers to explore fundamental physics and perform inertial sensing. For atomic fountain interferometers, the measurement time is limited by the available free-fall time to a few seconds. We instead realize atom interferometry with a coherent spatial superposition state held by an optical lattice beyond 1 minute. This performance was made possible by recent advances in the understanding and control of coherence-limiting mechanisms.
Deployed quantum sensors and clocks
Abstract: Quantum sensors will broadly impact industries including transportation and logistics, telecommunications, aerospace, defense, and geophysical exploration. They offer transformative performance gains over conventional technologies; atomic clocks are precise to 1 second in 50 billion years. However, these laboratory devices are large, fragile, and expensive. Commercial quantum devices require redesign from the ground up with a focus on real-world operability.
Light Synchronization Technique Heralds a Bright New Chapter for Small Atomic Clocks
Humanity’s desire to measure time more and more accurately has been a driving force in technological development, and improved clocks and the innovations behind them have repeatedly delivered unexpected applications and scientific discoveries. For instance, when sailors needed high precision timekeeping to better navigate the open seas, it motivated the development of mechanical clocks. And in turn, more accurate clocks allowed better measurements in astronomy and physics. Now, clocks are inescapable parts of daily life, but the demands of GPS, space navigation and other applications are still motivating scientists to push timekeeping to new extremes.