Earth Becomes a Giant Detector in New Space Quantum Sensor Mission
Scientists are taking a bold step in the search for new physics. They plan to use Earth itself as part of a massive space quantum sensor. This approach could reveal forces and particles that current theories cannot fully explain.Researchers are especially interested in exotic boson interactions. These signals may create tiny changes in atomic energy levels. As a result, they may produce faint pseudomagnetic fields that advanced sensors can detect.
How the SQUIRE Mission Works
The SQUIRE project places quantum spin sensors aboard the China Space Station. These sensors listen for tiny signals created by interactions between their own spins and Earth’s polarized geoelectrons. In addition, the unique conditions of space help the system capture changes that ground-based labs often miss.The station travels at almost 7.67 km/s. This high speed boosts relative motion, which is essential for detecting velocity-dependent interactions. Earth also provides nearly 10⁴² polarized spins, far more than any material available in laboratories.The spacecraft’s orbit naturally turns potential exotic signals into repeating low-frequency patterns. These signals sit in a range where background noise is very small. Therefore, the system can reach unprecedented sensitivity.
Breakthrough Technology Behind the Sensor
To achieve this precision, the team built a sensor that uses two xenon isotopes to reduce magnetic noise. They added multi-layer shielding and vibration compensation to keep readings stable. A radiation-hardened design also protects the system from cosmic rays.Together, these features allow the prototype to reach single-shot sensitivity ideal for detecting ultralight exotic signals.
A Future Network Across Earth and Space
SQUIRE may become part of a global space-ground quantum network. This network could improve searches for dark matter, axion halos, and other beyond-Standard-Model effects. In the future, distant planets may even serve as natural polarized sources, expanding the reach of this research across the solar system.
