Imagine a computer that made direct use of quantum mechanical phenomena. Such a machine would likely operate exponentially faster than our present computers.

**Zahid Hasan** is leading an international scientific collaboration that has observed an exciting and strange behavior in electrons’ spin within a new material that could be harnessed to transform computing and electronics. The team believes that the discovery is an advance in the fundamental physics of quantum systems and could lead to significant progress in electronics, computing and information science.

The team has been searching for a material whose atoms, when placed in certain configurations, would trigger electrons to produce exotic “quantum” effects. In the Feb. 13 issue of *Science*, the team reported that the quantum Hall effect, a phenomena in condensed-matter physics, can occur within a carefully constructed crystal made of an antimony alloy laced with bismuth. The behavior involves a strange form of rotation that could potentially transform computing and storage.

# Tag Archives: Quantum mechanics

# Lunch & Learn: Research Computing: Princeton Perspectives with Roberto Car, Frans Pretorius and Dan Marlow

At the November 7 Lunch ‘n Learn seminar, three Princeton faculty members described their use of the University’s TIGRESS High Performance Computing Center, a collaborative collection of four major HPC resources, storage, and the programmers needed to facilitate computational science and engineering on campus.

**Frans Pretorius**, Assistant Professor of Physics, gave a brief overview of the computational techniques and resources needed to solve Einstein’s field equations, and described how the TIGRESS facilities are instrumental to his research. He explained that numerical relativity is concerned with solving Einstein’s field equations Gαβ =8∂Tαβ. For the computation work on the University’s supercomputing facilities, the field equations form a system of ten coupled, non-linear, second order partial differential equations each depending upon four or more spacetime coordinates.