Creating an Open Quantum Systems Engineering Toolkit with Superconducting Qubits
Abstract
Quantum information technologies have matured to the point where a theorist can write down an arbitraryHamiltonian (describing a re al physical system) and an experimentalist can implement that Hamiltonian on quantuminformation hardware and thus emulate the real system, at least for relatively small systems. Even if quantumhardware is not yet coherent enough or complex enough to simulate al l Hamiltonians, the general approach toachieve simulation of arbitrary closed quantum systems is well-understood. However, this doe s not hold true forsimulating open quantum systemsystems where the interaction with the environment is significant. In other words ,if a theorist writes down an arbitrary master equation describing open quantum system dynamics, the hardware toemulate these dyna mics likely does not exist. Indeed, it may not even be known what the correct approach is tobuild that hardware! This is a major sh ortcoming, as control of open quantum systems dynamics would be extremelyhelpful to simulating systems where dissipation is essenti al to the behavior, e.g. quantum materials, and wouldspeed foundational research in quantum mechanics. In this project superconduct ing qubits, resonators, and othersuperconducting circuits will be used to make a general toolkit for engineering open quantum syste ms, includingnon-Markovian and non-Hermitian dynamics. The approach will include modulating couplings to baths of coherentmodes to create customizable environmental degrees of freedom; modulating the coherences of those modes to tunethe dissipation characterist ics of the environment itself; using weak measurement and measurement-based feedbackto implement arbitrary system evolution dynamic s; and generating on-demand dissipation as a resource. Once alltechniques are developed, they will be combined into flexible device s capable of emulating arbitrary small openquantum systems. The toolkit will rely only on relatively standard superconducting elect ronic devices and onwell-developed microwave control techniques, thus allowing rapid deployment to other research labs. Ifsuccessf ul, this program will enable future researchers to simulate open quantum systems with a flexible set ofexperimental tools. This wil l speed development of future quantum information technologies and will allow newinsights into quantum materials and other interest ing many-body systems. Eventually this will lead to increasedDoD capabilities in sensing, computing, and physical simulation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 20, 2021
- Source ID
- N000142112688
Entities
People
- Eli Levenson-Falk
Organizations
- Office of Naval Research
- United States Navy
- University of Southern California