Scalable Entanglement for Heisenberg-Limited Clocks and Sensors
Abstract
Scalable Entanglement for Heisenberg-Limited Clocks and SensorsAbstractThe objective of this project is to prepare atomic entangled states as scalable resources forquantum metrology near the fundamental Heisenberg limit. A focus will be on generatingmetrologically useful entangled states suitable for deployment in (1) long-distance networksand (2) local arrays enabling cascaded interrogation schemes. We will prepare maximallyentangled GHZ states of fifty atoms in an optical cavity by a quasi-deterministic heraldedphotonic scheme suitable for generating long-range entanglement across a fiber opticnetwork. As a small-scale prototype for envisioned applications of non-local GHZ states,we will construct a Heisenberg-limited gradient magnetometer composed of two atomic subensemblesentangled into a single GHZ state. We will also take steps toward the cascadedinterrogation of two or more independent, internally entangled ensembles for attainingHeisenberg-limited precision without sacrificing dynamic range. We will test two possibleapproaches to preparing multiple independent entangled states: either extending the cavity-QED scheme or, alternatively, optically coupling atoms to Rydberg states. Finally, we willinvestigate whether the benefits of cascaded interrogation can be extended beyond GHZstates to oversqueezed states that theoretically attain near-Heisenberg-limited precision withreduced technical demands on state preparation and detection.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2017
- Source ID
- N000141712279
Entities
People
- Monika Schleier-Smith
Organizations
- Office of Naval Research
- Stanford University
- United States Navy