Quantum Dynamics in Correlated Spin Systems
Lead Research Organisation:
University College London
Department Name: London Centre for Nanotechnology
Abstract
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Organisations
People |
ORCID iD |
| Steven Bramwell (Principal Investigator) |
Publications
Billington D
(2021)
Experimental measurement of the isolated magnetic susceptibility
in Physical Review B
| Description | The wonder of the quantum world - epitomised by Schrödinger's both-alive-and-dead cat - is rarely encountered in macroscopic measurements. In magnetism, the reason is that a macroscopic measurement will hopelessly scramble quantum details and instead yield smoothed out thermodynamic quantities, like the magnetic susceptibility. The project team have made a macroscopic measurement on a bulk magnet - using a simple coil of wire - where the result isn't at all thermodynamic, or smoothed out. Instead the measurement reveals a quantum adiabatic susceptibility that reflects the superposition or "concurrence" of the spin states of ions deep within the magnet -- just like Schrödinger's thought experiment reveals the superposition of alive and dead. The measurement provides a measurement of the populations of these quantum states which can potentially be used to study far from equilibrium phenomena in magnetism -- these populations could be manipulated by applying radiation and then measured by a simple coil of wire. |
| Exploitation Route | Further ways of exploring quantum states using straightforward apparatus. |
| Sectors | Education,Electronics |