Probing molecular spin clusters by local measurements
arXiv:1604.06539 · doi:10.1103/PhysRevB.94.115422
Abstract
We address the characterization of molecular nanomagnets at the quantum level and analyze the performance of local measurements in estimating the physical parameters in their spin Hamiltonians. To this aim, we compute key quantities in quantum estimation theory, such as the classical and the quantum Fisher information, in the prototypical case of an heterometallic antiferromagnetic ring. We show that local measurements, performed only on a portion of the molecule, allow a precise estimate of the parameters related to both magnetic defects and avoided level crossings.
4+2 pages, 3 figures
References in corpus (5)
- Will spin-relaxation times in molecular magnets permit quantum information processing?
- Quantum criticality as a resource for quantum estimation
- Direct Observation of Quantum Coherence in Single-Molecule Magnets
- Quantum phase transitions and quantum fidelity in free fermion graphs
- Quantum metrology in Lipkin-Meshkov-Glick critical systems
Cited by in corpus (10)
- Quantum probes for the cutoff frequency of Ohmic environments
- Probing the spectral density of a dissipative qubit via quantum synchronization
- Quantum metrology beyond the Quantum Cramér-Rao theorem
- Characterization of qubit chains by Feynman probes
- Quantum Probes for Ohmic Environments at Thermal Equilibrium
- Universal quantum magnetometry with spin states at equilibrium
- Quantum metrology at level anti-crossing
- Remote Parameter Estimation in a Quantum Spin Chain Enhanced by Local Control
- Dephasing-tolerant quantum sensing for transverse magnetic fields with spin qudits
- A systematic approach to determine the spectral characteristics of molecular magnets