Exceptional-point-assisted entanglement, squeezing, and reset in a chain of three superconducting resonators

Abstract

The interplay between coherent and dissipative dynamics required in various control protocols of quantum technology has motivated studies of open-system degeneracies, referred to as exceptional points (EPs). Here, we introduce a scheme for fast quantum-state synthesis using exceptional-point engineering in a lossy chain of three superconducting resonators. We theoretically find that the rich physics of EPs can be used to identify regions in the parameter space that favor a fast and quasi-stable transfer of squeezing and entanglement, or a fast reset of the system. For weakly interacting resonators with the coupling strength $g$, the obtained quasi-stabilization time scales are identified as $1/(2\sqrt{2}g)$, and reset infidelities below $10^{-5}$ are obtained with a waiting time of roughly $6/g$ in the case of weakly squeezed resonators. Our results shed light on the role of EPs in multimode Gaussian systems and pave the way for optimized distribution of squeezing and entanglement between different nodes of a photonic network using dissipation as a resource.

14 pages, 6 figures

References in corpus (16)

• Confining the state of light to a quantum manifold by engineered two-photon loss
• Demonstrating a Driven Reset Protocol of a Superconducting Qubit
• Quantum thermodynamic devices: from theoretical proposals to experimental reality
• Low-Disorder Microwave Cavity Lattices for Quantum Simulation with Photons
• Microwave-Induced Cooling of a Superconducting Qubit
• Determination of continuous variable entanglement by purity measurements
• Universal stabilization of a parametrically coupled qubit
• Decoherence Induced Exceptional Points in a Dissipative Superconducting Qubit
• Topological quantum state control through exceptional-point proximity
• Theory of quantum-circuit refrigeration by photon-assisted electron tunneling
• Thermal transport in out of equilibrium quantum harmonic chains
• Exceptional points in oligomer chains
• Single-junction quantum-circuit refrigerator
• Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling
• Recent Developments in Quantum-Circuit Refrigeration
• Unified framework to determine Gaussian states in continuous variable systems

Cited by in corpus (6)

• Measuring topological invariants for higher-order exceptional points in quantum three-mode systems
• Quantum-circuit refrigeration of a superconducting microwave resonator well below a single quantum
• Emergent Liouvillian exceptional points from exact principles
• Multitype entanglement dynamics induced by exceptional points
• Enhancing Nonreciprocity through Squeezing-Induced Symmetry Breaking
• Squeezing enhanced sensing at an exceptional point