Project 3: Entanglement in Mesospin Systems
Professors A. Starace (Coordinator), A. Rajca, R. Skomski; Dr. G. Lagmago Kamta; GRA K. Das, A. Istomin
The aim of this exciting new research is in the synthesis of molecular magnets
and quantum studies of entanglement in interacting spin systems. The concept
of entanglement goes back to Schrödinger and means the information contained
in two ore more subsystems cannot be separated.
We have prepared and studied the magnetic properties of very high-spin organic
polyradicals and molecules with p-conjugated systems and we reported the first
magnetic polymer in Science in November, 2001. We will conduct further synthetic
work and investigate exchange interaction and physical properties through structure
control – research that could lead to a breakthrough realization of quantum
computing in magnetic nanostructures.
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Quantum-mechanical nature of a single qubit: (a) spinor representation and (b) Bloch-sphere visualization. |
Entanglement is a nonlocal correlation between quantum systems that does not exist classically. Quantum entanglement is relevant, and even crucial, in many areas of quantum information, including quantum cryptography, quantum teleportation, quantum computation, and quantum measurement, and its importance has stimulated ways to quantify and control it. It has become a measurable physical characteristic of quantum systems, just like energy. Experimental studies of polymeric and other mesoscopic magnets that may serve as real, interacting (entangled) spin systems together with theoretical quantum studies of entanglement in interacting spin systems are the immediate focal points of this project. Our underlying aim is to pioneer the experimental and theoretical investigation of entangled quantum phenomena in mesoscopic spin systems, such as oligomers, dots, and wires. In the future, this research could lead to a realization of quantum computing in magnetic nanostructures.
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Entanglement is a many-body phenomenon involving two or more single-particle states (blue spheres), such as atomic eigenstates (a) and spin states (b). It means that the occupancies of the states by two different particles (yellow and red) are correlated (c). |
3.1. Synthesis and Structural Characterization of Molecular Magnetic Systems
3.2. Magnetic Properties of Mesospin Systems
3.3. Theoretical Analysis of Entanglement in Interacting Spin Systems