Article

Magnetic field sensors using 13-spin cat states

Phys Rev A 82:022330. DOI:10.1103/PhysRevA.82.022330 pp.022330

ABSTRACT Measurement devices could benefit from entangled correlations to yield a measurement sensitivity approaching the physical Heisenberg limit. Building upon previous magnetometric work using pseudoentangled spin states in solution-state NMR, we present two conceptual advancements to better prepare and interpret the pseudoentanglement resource. We apply these to a 13-spin cat state to measure the local magnetic field with a 12.2 sensitivity increase over an equivalent number of isolated spins.

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Keywords

12.2 sensitivity increase
 
13-spin cat state
 
local magnetic field
 
Measurement devices
 
physical Heisenberg limit
 
previous magnetometric work
 
pseudoentanglement resource
 
solution-state NMR
 

Stephanie Simmons