Quantum computing - Real-time feedback for Rydberg atom arrays
Abstract
Quantum information science is poised to dramatically affect modern society by offering advances in computing, sensing, and cryptographic security. Neutral atoms are rapidly emerging as a leading and scalable quantum hardware platform. However, fast, non-destructive, targeted readout of quantum bits (called ‘qubits’) during coherent evolution remains an outstanding challenge. The inability to perform such readout operations precludes the use of the neutral atom platform for applications like quantum error correction that require real-time feedback and dynamic control. We will pursue a novel solution to this challenge by incorporating an array of alkaline earth (-like) atoms in an optical cavity. We encode quantum information in the nuclear spin-1-2 degree of freedom in a long-lived metastable state of ytterbium-171 and perform entangling operations with highly excited Rydberg states. We employ a near-concentric optical cavity with large mirror spacing that is strongly coupled to the atomic ground state, and we leverage the ability to perform fast, high-fidelity, local read enable operations on the optical clock transition to map a qubit state to the ground state such that it can interact with the cavity field. We combine this hardware platform with a control architecture that enables fast, real-time decision making to implement feedback on a programmable quantum system of many qubits. Specifically, we will implement quantum error correction operations based on surface codes as a crucial step towards large-scale, fault-tolerant quantum computation with neutral atoms. Moreover, our platform will enable advances in modular quantum computing, quantum networking, and quantum-enhanced metrology by merging Rydberg atom arrays, cavity quantum electrodynamics, and alkaline-earth (-like) atoms – three pillars of modern atomic physics – in one system for the first time.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310059
Entities
People
- Jacob P Covey
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Illinois Urbana–Champaign