English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Algorithmic cooling methods manipulate an open quantum system in order tolower its temperature below that of the environment. We show that significantcooling is achieved on an ensemble of spin-pair systems by exploiting thelong-lived nuclear singlet state, which is an antisymmetric quantumsuperposition of the "up" and "down" qubit states. The effect is demonstratedby nuclear magnetic resonance (NMR) experiments on a molecular systemcontaining a coupled pair of near-equivalent 13C nuclei. The populations of thesystem are subjected to a repeating sequence of cyclic permutations separatedby relaxation intervals. The long-lived nuclear singlet order is pumped wellbeyond the unitary limit, and the nuclear magnetization is enhanced by 21%relative to its thermal equilibrium value. To our knowledge this is the firstdemonstration of algorithmic cooling using a quantum superposition state andwithout making a distinction between rapidly and slowly relaxing qubits.

Algorithmic Cooling of Nuclear Spin Pairs using a Long-Lived Singlet State