Robust Entanglement-Enhanced Metrology with Atoms and Solid-State Spins
Abstract
In the past few decades, it has become increasingly apparent that quantum entanglement is theoretically an extremely powerful resource: From ShorÕs algorithm for efficiently factoring large numbers to high-temperature superconductivity, quantum encryption, communication, and metrology, entanglement has pushed the boundary of what is in principle possible. In practice, entangled states are challenging to prepare, and once created, are often delicate and short lived. In the field of quantum metrology, proof-of-principle experiments have already harnessed entanglement to achieve significant gains in the stability of clocks and the sensitivity of magnetometers, yet performance beyond that of state-of-the-art classical devices has yet to be realized. Achieving a real-world benefit will require (1) transferring techniques from idealized laboratory settings to technologically relevant platformsÑsuch as optical clocks and solid-state magnetometers, (2) designing entanglement-enhanced protocols that are maximally robust to imperfections such as disorder, noise, and dissipation, and (3) developing sensing protocols that enhance real-world figures of merit, including not only precision but also dynamic range, bandwidth, and spatial resolution. To surmount these challenges, we have assembled a team of researchers who are demonstrated world leaders in assembling and manipulating non-classical states of light and matter, solid-state quantum sensing, and quantum control in noisy environments. We bring with us state-of-the-art experimental platforms custom -designed and -built to efficiently generate entanglement. Together, we will develop protocols for generating metrologically powerful entangled states that are robust to real-world noise and realistic experimental imperfections: from dissipative stabilization of steadystate entanglement to periodic driving to reshape noise spectra and variational algorithms for noiseagnostic performance optimization, we will explore just how resilient entanglement can be to the realities of the world outside of the lab. By comparing idealized all-to-all coupled, homogeneous cryogenic cold-atom experiments to short-range interacting Rydberg-arrays and ultimately, disordered solid-state platforms, we will develop the tools necessary to transfer our techniques from well-controlled academic labs to the field. The techniques we develop will enable next-generation atomic clocks with world-leading shortterm stability and robustness to noise, plus entanglement-enhanced sensors for measuring magnetic/ electric fields and gravity gradients, all with tunable bandwidth, spatial- and spectral- resolution. In addition to this menagerie of noise-robust entangled states and protocols for creating them, our program will result in a clear assessment of when entanglement provides a practical win for real-world sensors, and a road-map of algorithms and platforms necessary to make such sensors a reality.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 20, 2020
- Source ID
- W911NF2010136
Entities
People
- Monika Schleier-Smith
Organizations
- Army Contracting Command
- Stanford University
- United States Army