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Quantum entanglement revealed at room temp in SiC wafers

Technology News |
By eeNews Europe

The phenomenon usually requires ultra-low temperatures or high magnetic fields to survive thermodynamic disturbances and so the development is of significance for the application of entanglement to quantum computing, communications and sensing.

 

Entanglement is a not well-understood physical phenomenon whereby particles’ quantum states cab be inextricably linked so that a change in the state of one particle is accompanied instantaneously by a corresponding change in the state of entangled particle no matter how far apart they are; something Albert Einstein called "spooky action at a distance."

The researchers used infrared laser light to align the magnetic states of thousands of electrons and nuclei in a silicon carbide wafer and then used electromagnetic pulses to entangle them. This procedure caused pairs of electrons and nuclei in a 40 micrometer-cubic cell of the to become entangled.

The group said that quantum sensors could be made that have much higher sensitivity than non-quantum sensor. These could be entanglement-enhanced magnetic resonance imaging probes.

The work has been written up by lead author Paul Klimov, a graduate student in the Institute for Molecular Engineering, a partnership between the University of Chicago and Argonne National Laboratory. The paper “Quantum entanglement at ambient conditions in a macroscopic solid-state spin ensemble,” by Paul V. Klimov, Abram L. Falk, David J. Christle, Viatcheslav V. Dobrivitski and David D. Awschalom,was published online Nov. 20 in Science Advances.

Related links and articles:

www.uchicago.edu

Science Advances article

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