A2D2 Quantum Arrays - A two atomic species, two-dimensional quantum array with quantum nondemolition measurement and local quantum control
Abstract
The realization of large-scale controlled quantum systems is an exciting frontier in modern science. Such systems can provide insights into fundamental properties of quantum matter and enable new applications that are powered by quantum properties such as quantum sensing, quantum communication and ultimately quantum computation. Some of the leading platforms include trapped ions and superconducting circuits which are approaching system sizes of about50 qubits but face challenges in controlling and scaling beyond. Recently, a promising alternative has emerged: arrays of individually trapped neutral atoms. Their outstanding coherence properties combined with a flexible trapping approach has the potential of overcoming the scalability challenges of other platforms. However, important capabilities do not exist for this platform. Crucially, this includes the ability to non-destructively measure the state of the atomicqubits. Such a quantum nondemolition (QND) readout is an essential requirement for many important quantum protocols such as quantum error correction, measurement-based protocols, including one-way quantum computing, and adaptive quantum sensing strategies. Furthermore,to reach the full potential of the atom array platform new tools for individually controlling the atomic qubits are needed. Here we address both of these challenges by proposing a novel approach, led by Hannes Bernien as principal investigator, using a two-dimensional array of two atomic species. The second atomic species serves as ancillary qubits enabling a quantumnondemolition measurement of the primary qubits, as well as facilitating a new method for local quantum control. We will demonstrate both of these capabilities in an experiment that creates large-scale fully entangled GreenbergerHorneZeilinger (GHZ) states in a fast, efficient protocol. These states are an important resource both for quantum sensing and quantum computation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012510
Entities
People
- Hannes Bernien
Organizations
- Office of Naval Research
- United States Navy
- University of Chicago