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UNSW Has Found a Way to Access Information Stored Within Atoms


Artist's impression of a silicon chip for a spin-based quantum computer.

Researchers have demonstrated a compact sensor for accessing information stored in the electrons of individual atoms.

Credit: Tony Melov

Researchers at the University of New South Wales (UNSW) in Australia have demonstrated a compact sensor for accessing information stored in the electrons of individual atoms.

The team thinks quantum bits (qubits) built from electrons hosted on single atoms in semiconductors hold promise as a large-scale quantum computing platform; the approach involves generating qubits by precisely positioning and encapsulating individual phosphorus atoms within a silicon chip.

This was complicated by the need to add in the various connections and gates required to scale up the atomic architecture.

Integrating a read-out sensor into a control gate halved the minimum requirement for four gates for each qubit.

Said UNSW's Prasanna Pakkiam, "By integrating a superconducting circuit attached to the gate, we now have the sensitivity to determine the quantum state of the qubit by measuring whether an electron moves between two neighboring atoms."

From ZDNet
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