Researchers from Ames National Laboratory and Iowa State University have unveiled the emergence of Higgs echoes in niobium superconductors. These findings shed light on quantum behavior that could influence the development of next-generation quantum sensing and computing technologies.
Using Higgs Echo Spectroscopy, Huang et al reveal unconventional echo formation due to non-uniform expansion and soft quasiparticle bands, dynamically evolving under THZ drive. Image credit: Ames National Laboratory.
Superconductors are materials known for conducting electricity without resistance.
These superconducting materials exhibit collective oscillations referred to as the Higgs mode.
The Higgs mode represents a quantum phenomenon that occurs when the electronic potential fluctuates similarly to a Higgs boson.
Such modes manifest when the material experiences a superconducting phase transition.
Monitoring these vibrations has posed challenges for scientists for many years.
Additionally, they interact complexly with quasiparticles, which are electron-like excitations arising from superconducting dynamics.
By utilizing advanced terahertz (THZ) spectroscopy, the researchers identified a new type of quantum echo known as Higgs echo in superconductive niobium materials utilized in quantum computing circuits.
“Unlike traditional echoes seen in atoms and semiconductors, Higgs echoes result from intricate interactions between Higgs modes and quasiparticles, generating anomalous signals with unique properties.”
“Higgs echoes can uncover and reveal hidden quantum pathways within a material.”
By employing precisely-timed THZ radiation pulses, the authors were able to detect these echoes.
These THZ radiation pulses can also facilitate the encoding, storage, and retrieval of quantum information embedded in the superconducting material via echoes.
This study illustrates the ability to manipulate and observe the quantum coherence of superconductors, paving the way for innovative methods of storing and processing quantum information.
“Grasping and controlling these distinctive quantum echoes brings us closer to practical quantum computing and advanced quantum sensing technologies,” stated Dr. Wang.
a paper detailing these findings was published in the journal on June 25th in Advances in Science.
____
Chuankun Huang et al. 2025. Discovery of unconventional quantum echoes due to Higgs coherence interference. Advances in Science 11 (26); doi:10.1126/sciadv.ads8740
Source: www.sci.news
