Error-corrected Universal Reconfigurable Ion-trap Quantum Archetype (EURIQA)
Abstract
The overall objective of the proposed research is to explore and experimentally demonstrate a multi-qubit trapped ion system capable of executing quantum error-correction (QEC) tasks, and thereby realize an encoded logical qubit based on a trapped atomic ion platform. A primary objective is the experimental demonstration of high-fidelity qubit gates that overcome the threshold for QEC tasks. Additional objectives include pursuing theory and experiments to understand dominant sources of error in the proposed ion-trap system and suppressing these errors through careful design of surface traps, trap chambers, optical systems, and multi-qubit control architectures. The overall proposed approach is based on the use of Yb ion qubits and the exploitation of the hyperfine states of these ions for high-fidelity qubit operations. Frequency-comb driven Raman gates will be pursued to suppress intrinsic error due to off-resonant effects. Another dominant error source, ion heating, will also be addressed. This will be suppressed by exploiting micro-fabricated trap structures, cryogenic ( 4K) temperatures, and careful design of the optical delivery system at the ion positions in the trap to achieve enhanced stability. Other aspects of the experimental system which will be addressed to achieve the required high-fidelity gates include: -A compact vacuum chamber and optical assembly around the ion traps to minimize the free-space propagation of the laser beams before they reach the ion. This will result in more reliable and higher quality optical control of the qubits. -The fiber delivery of the Raman and other continuous wave (cw) laser beams to the optical assembly and the active control of the optical power. This will result in suppressed intensity fluctuations. -A mechanical enclosure to control the air currents and provide magnetic shielding. This will passively reduce ambient noise on the optical control fields and the qubits. -Reduced anomalous heating through the use of the latest chip traps and cryogenic environments to suppress motional decoherence during the optically-driven multi-qubit gate operations. -Individual qubit optical addressing mechanisms based on both acousto-optics and :MEMS mirror arrays. These will be implemented with minimal crosstalk noise. -Very stable and compact cw laser systems to provide more reliable cw laser sources than present systems and eliminate system operation downtime. Details of the approach in each of these areas and a statement of work have been included in the proposal.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 12, 2017
- Source ID
- W911NF1610082
Entities
People
- Jungsang Kim
Organizations
- Army Contracting Command
- Duke University
- United States Army