Centre updates

Researchers find quantum computations could be hidden

CQC2T's Dr Nick Menicucci is part of a team that have proposed cloud-based quantum computers could be used remotely without revealing the user's purpose and without the user having access to their own quantum resources.

Towards classically driven blind quantum computation. Credit: Timothy Yeo/Centre for Quantum Technologies, National University of Singapore

The work, published in Physical Review X, was part of a collaboration with researchers from the Centre for Quantum Technologies at the National University of Singapore and the Singapore University of Technology and Design. The team propose that concealing which steps in a series perform the desired calculation would be akin to hiding a needle in a haystack.

Read more at EurekAlert!

Access the full paper at Physical Review X.

Quantum probes dramatically improve detection of nuclear spins

CQC2T researchers at the University of Melbourne have demonstrated a way to detect nuclear spins non-invasively using quantum technology, providing a new tool for materials science and biotechnology.

A nitrogen-vacancy (dark blue) quantum probe performing nanoscale nuclear magnetic resonance (NMR) on molecular hydrogen. A green laser controls the quantum state of the probe, which is tuned to the resonant frequency of target nuclear spins. The probe responds to the nuclear spins of the hydrogen atoms and provides a direct measurement via the red light emitted. Image credit: David A. Broadway/cqc2t.org

The team, led by CQC2T Deputy Director Prof Lloyd Hollenberg, has used a quantum probe to perform microwave-free nuclear magnetic resonance (NMR) spectroscopy at the nanoscale. The new technique overcomes significant limitations with existing approaches.

Read more at EurekAlert!

Access the full paper at Nature Communications.