Researchers Suppressed Electron Tunneling With Laser Light
New research shows how laser-induced exceptional points can modulate quantum transport to enable dynamic switches.
Updated on Sept. 23, 2026 in Quantum Computing
Live Poll
Do you believe quantum computing breakthroughs will lead to faster everyday electronics for the public?
Researchers have demonstrated a method to suppress electron tunneling in resonance tunneling diodes by utilizing laser-induced exceptional points. This research-stage development achieves complete suppression of the resonance peak in the device's transmission profile.
Why it matters
The ability to actively control quantum transport allows for more precise modulation of current within electronic devices. This mechanism is expected to facilitate the creation of dynamic quantum switches for future computing architectures.
Numerical simulations confirm that the suppression effect remains stable across various laser frequencies and intensities. The method exploits non-Hermitian degeneracies—mathematical points where quantum states collapse—to alter transmission profiles.
The details
The team applied a double barrier potential, which serves as a model for the conduction band of a resonance tunneling diode—a component that allows electrons to pass through two energy barriers via quantum tunneling. By using laser-induced exceptional points—states where both the eigenvalues and eigenvectors of a system coalesce—researchers effectively manipulated the quantum transport. This process forces the device to suppress electron flow by silencing the resonance peak in its transmission profile.
Timeline
September 23, 2026: The research findings were formally published.
The Tech Race
This research follows a pattern established by ongoing studies in non-Hermitian physics and quantum material control. It marks a departure from static device design by providing a method for dynamic electrical modulation.
This development is currently at the research stage and does not yet affect commercial electronic hardware. Designers of future high-speed quantum circuits and switches are the primary audience for these findings.
The takeaway
This method establishes a new control mechanism for quantum transport through light-matter interaction. Future developments will likely focus on whether these results can be replicated in physical hardware prototypes.
Further reading
For broader context on current developments in this field, visit Quantum Computing.
More information
Read the complete peer-reviewed research article on the nature portal.
Live Poll
Do you believe quantum computing breakthroughs will lead to faster everyday electronics for the public?
