# Columbia University researchers trap electron waves in the metal Pd5AlI2, reported in Science

- Published: 2026-11-15 10:32 UTC
- Section: Science › Physics
- Tags: trapped electron waves, Pd5AlI2, quantum interference in metals, frustrated electron hopping, electronic bound states, Columbia University physics, Raquel Queiroz, quantum sensors
- URL: https://realtech.media/news/rt-60181651c208c10daa9145ed_columbia_university_researchers/

**Columbia physicists observed electron waves bound near atomic defects in a Pd5AlI2 crystal, a trapping effect previously documented only for light waves.**

![Columbia University researchers trap electron waves in the metal Pd5AlI2, reported in Science](https://realtech.media/media/2026/11/6178ca794f616b4e.webp)
*udaipurkiran.com*

Researchers at Columbia University have trapped electron waves in the metal Pd5AlI2, according to udaipurkiran.com, which cites an article in the journal Science [1]. The report is dated New Delhi, November 15. Until now, this phenomenon had only been observed with light waves [1].

## Frustrated electron hopping

Theoretical physicist Raquel Queiroz said that quantum mechanics predicts an electron wave can remain trapped even when there are infinitely many paths for it to escape. The team, which includes experimental physicists Cory Dean and Aravind Devarakonda, found that the arrangement of atoms in Pd5AlI2 leads to unique interactions among electrons. These interactions create competing paths that hinder the electrons and cause them to become trapped; the characteristic is called frustrated electron hopping [1].

Initial scans of the material showed unexpected patterns. They were later identified as electron waves bound near atomic defects in the crystal lattice. Queiroz described this as the first clear evidence of quantum interference trapping a state in a metal [1].

## Waves, not ping-pong balls

The result challenges the classical view of metals, in which electrons are thought to move freely like discrete ping-pong balls. According to the researchers, electron behavior is more accurately described as waves that can interfere with one another [1].

The team believes that the ability to trap and manipulate electron waves could lead to advances in quantum sensors and quantum computing [1]. One researcher said, "If you trap a particle, you can manipulate it," pointing to broad implications for technologies using electronic bound states.

The trapping seen so far is random. The researchers plan to explore ways to introduce defects in Pd5AlI2 intentionally in order to control the interference patterns. They also intend to investigate other metals with similar structures that may show electronic bound states, and to look for new types of metals capable of trapping electron waves [1].

## Sources

1. [udaipurkiran.com](https://udaipurkiran.com/columbia-researchers-trap-electron-waves-in-quantum-mechanics-breakthrough)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-60181651c208c10daa9145ed_columbia_university_researchers/