Optimizing Passive Quantum Clocks

Published

October 8, 2014

Author(s)

Michael J. Mullan, Emanuel Knill

Abstract

We describe protocols for passive atomic clocks based onquantum interrogation of the atoms. Unlike previous techniques, our protocols are adaptive and take advantage of prior information about the clock's state. To reduce deviations from an ideal clock, each interrogation is optimized by means of a semidefinite program for atomic state preparation and measurement whose objective function depends on the prior information. Our knowledge of the clock's state is maintained according to a Bayesian model that accounts for noise and measurement results. We implement a full simulation of a running clock with power-law noise models and find significant improvements by applying our techniques.

Citation

Physical Review A

Volume

90

Issue

4

Pub Type

Journals

Download Paper

DOI Link

Keywords

heisenberg limit, semidefinite programming, quantum logic clocks, standard quantum limit

Citation

Mullan, M. and Knill, E. (2014), Optimizing Passive Quantum Clocks, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.90.042310 (Accessed April 26, 2024)