Quantum or classical? A reinvestigation of the Quasi 1D Ising Systems CsCoX<sub>3</sub> (X = Cl, Br)
ORAL
Abstract
The presence of entanglement signifies a unique aspect of quantum materials which is absent in classical systems. Experimental determination of entanglement has remained one of the most highly sought protocols for probing the quantum behavior in solid state systems. Recent breakthroughs in measuring entanglement witnesses via spectroscopic measurements have opened an avenue toward quantifying entanglement present in quantum systems. Most notably these witnesses focused on a quantum limit Heisenberg spin chain system, where a close theoretical and experimental comparison could be made. In this talk I reinvestigate the canonical quasi-1D Ising systems CsCoX3 (X = Br,Cl) using state of the art neutron spectrometers. A careful comparison with theory and estimates of entanglement witnesses within these systems is discussed as well as their sensitivity to experimental factors.
*This work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This material is based upon work supported by the U.S. Department of Homeland Security under Grant Award Number 20CWDARI00036 and by the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA0003996
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Presenters
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Colin Sarkis
- Oak Ridge National Laboratory