Fundamental Physics with a State-of-the-Art Optical Clock in Space

TL;DR

This paper proposes a space mission with an advanced optical atomic clock in orbit to perform highly sensitive tests of general relativity, dark matter searches, and establish precise time and geodesic references.

Contribution

It introduces a novel space-based optical clock mission concept with unprecedented sensitivity for fundamental physics tests and timing applications.

Findings

Designed a space mission concept with an optical clock in eccentric orbit.

Proposed laser link for precise time, range, and velocity measurements.

Aimed to improve gravitational redshift test sensitivity by 30,000 times.

Abstract

Recent advances in optical atomic clocks and optical time transfer have enabled new possibilities in precision metrology for both tests of fundamental physics and timing applications. Here we describe a space mission concept that would place a state-of-the-art optical atomic clock in an eccentric orbit around Earth. A high stability laser link would connect the relative time, range, and velocity of the orbiting spacecraft to earthbound stations. The primary goal for this mission would be to test the gravitational redshift, a classical test of general relativity, with a sensitivity 30,000 times beyond current limits. Additional science objectives include other tests of relativity, enhanced searches for dark matter and drifts in fundamental constants, and establishing a high accuracy international time/geodesic reference.