Magnetic field sensors using 13-spin cat states

Journal article

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. © 2010 The American Physical Society.

Authors: Simmons, S; Jones, J; Karlen, S; Ardavan, A; Morton, J

• Journal: Physical Review A - Atomic, Molecular, and Optical Physics
• Volume: 82
• Issue: 2
• Publication date: 2010-08-26
• DOI: 10.1103/PhysRevA.82.022330
• EISSN: 1094-1622
• ISSN: 1050-2947
• Language: English