The Great Space (Clock) Race

Optical Clocks

The transition from traditional microwave atomic clocks to optical atomic clocks marks a significant leap in precision. Emily Kwong explains that traditional clocks use microwaves to excite atoms, but optical clocks use lasers, achieving precision up to three orders of magnitude better 1. Holly Leopardi highlights the use of strontium atoms, which are ideal for space due to their stability and precise frequency requirements 1.

The laser being precise makes the strontium atom precise, which makes the clock precise.

--- Emily Kwong

This advancement reduces the need for frequent time checks with Earth, enhancing the clock's autonomy in space applications 1.

   

Space Clocks

NASA's initiative to deploy quantum clocks in space aims to revolutionize measurements and navigation. Holly Leopardi envisions a network of optical clocks in space to explore fundamental physics questions, such as the interaction between gravity and quantum mechanics 2. These clocks could provide insights into Earth's gravitational changes, impacting our understanding of phenomena like sea ice melting 2.

We want to actually fly them in space and we want them to make a difference for our science measurements.

--- Unknown

The current atomic clock system, used in GPS, is prone to errors, but quantum clocks promise greater accuracy and autonomy, reducing the need for constant updates from Earth 3.