Cooling classical many-spin systems using feedback control
arXiv:2011.09321 · doi:10.1103/PhysRevB.105.104305
Abstract
We propose a technique for polarizing and cooling finite many-body classical systems using feedback control. The technique requires the system to have one collective degree of freedom conserved by the internal dynamics. The fluctuations of other degrees of freedom are then converted into the growth of the conserved one. The proposal is validated using numerical simulations of classical spin systems in a setting representative of Nuclear Magnetic Resonance experiments. In particular, we were able to achieve 90 percent polarization for a lattice of 1000 classical spins starting from an unpolarized infinite temperature state.
5 pages, 3 figures
References in corpus (11)
- Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath
- Quantum Feedback Control of Atomic Motion in an Optical Cavity
- Local observation of antibunching in a trapped Fermi gas
- Quantum Control of a Single Qubit
- The role of spin noise in the detection of nanoscale ensembles of nuclear spins
- Zeno and anti-Zeno polarization control of spin-ensembles by induced dephasing
- Quantum versus Classical Dynamics in Spin Models: Chains, Ladders, and Square Lattices
- Effectiveness of classical spin simulations for describing NMR relaxation of quantum spins
- Confined nano-NMR spectroscopy using NV centers
- Employing feedback in adiabatic quantum dynamics
- Anti-Zeno purification of spin baths by quantum probe measurements