Tailoring Quantum Entanglement in Driven-Dissipative Superconducting Circuits
Abstract
Quantum entanglement is at the heart of quantum many-body physics and more broadly, quantum information sciences. It is crucial to understand and subsequently control entanglement in the presence of dissipation in quantum systems due to inevitable system-environment interactions. Superconducting quantum circuits provide such an ideal playground where one can precisely tailor the coupling between the quantum circuit and engineered baths; while high-fidelity control and readout offer unprecedented details into the microscopic dynamics of quantum entanglement and quantum information. The objective of this collaborative project is to experimentally and theoretically investigate novel entangled many-body states that are difficult to access in closed systems by engineering highly tunable local and correlated dissipation in superconducting circuits. By tightly integrating experimental efforts and theoretical modeling, we will design and develop a comprehensive toolbox for creating driven-dissipative baths with full spatial, spectral, and temporal control. Using this toolbox, we first investigate how long-range correlation can be stabilized in steady-state phases of a qubit lattice subject to local gain and loss. We then turn to non-local baths, and explore how correlated dissipation can lead to highly entangled states, including but not limited to the so-called rainbow states that consist of both short-ranged and long-ranged Bell pairs, novel condensates with unconventional order parameters, and exotic charge density waves that are deeply connected to non-Abelian quantum Hall states. A key element is to exploit many-body dark states arising from bath-coupled qubit arrays with an adjustable range of couplings and connectivity, which could support quantum correlations and quantum entanglement unattainable in conventional systems. In addition to equilibrium physics, we further explore non-equilibrium dynamics in qubit arrays, aiming at understanding the growth and propagation of quantum entanglement in drivendissipative systems and delivering new recipes to dynamically control quantum coherence and quantum correlations. Overall, the project is expected to result in new methods for the efficient generation of novel entangled many-body states in superconducting circuits and deepen our understanding of coherent and dissipative dynamics in open quantum systems. Such entangled quantum resources are critical for the application of quantum technology in computing, emulation, and sensing.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 06, 2024
- Source ID
- FA95502310491
Entities
People
- Ruichao Ma
Organizations
- Air Force Office of Scientific Research
- Office of the Secretary of Defense
- Purdue University