Stabilizing Quantum Information through Dissipation - Research Area 6: Physics
Abstract
The overall objective of this proposal is to explore robust methods to create and stabilize multi-qubit entangled quantum states using dissipation mechanisms. Specific objectives include developing the theory for a cavity QED system that is foundational to many of the current and planned experiments in multi-qubit systems. While the proposed theory will generally be applicable to several different physical implementations of cavity QED physics, a specific objective will be to apply the theory to a superconducting system. Collaborations with experimental groups will be pursued to validate and refine the theory for superconducting cavity QED systems. The overall proposed approach is to develop theory that includes specific dissipation mechanisms in a cavity QED system and explore whether these mechanisms can be controlled sufficiently to allow the system to evolve to desired complex entangled quantum states. Although the proposed theory may have general application, this one-year seedling effort will focus on superconducting systems. Currently, there are several groups experimenting with such superconducting systems. The cavity QED system proposed to be analyzed couples each superconducting qubit in the system to a resonator. The resonators can exchange photons through either direct capacitive coupling or a waveguide, either one of which will produce a photon-mediated frequency dependent interaction between the qubits. In addition to the unitary dynamics this coupling gives rise to, there is a dissipative component to the dynamics whose spectral properties can be precisely engineered by a driving field. When tuned, the resulting system evolution stabilizes a pure entangled state of the spatially separated qubits. The challenges of optimizing the drive for long coherence time will be explored, given experimental system parameters and available control. Initial results will be generated for a two-qubit system, which can be readily tested in an experiment. Extensions of this approach that can be experimentally realized in larger multi-qubit systems will be pursued.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 12, 2017
- Source ID
- W911NF1510299
Entities
People
- Hakan E. Türeci
Organizations
- Army Contracting Command
- National Security Agency
- Princeton University