Topological Spin–Charge Gearbox on a Real Molecular Magnet

Experimental and Theoretical Study of the Ultrafast Dynamics of a Ni2Dy2‐Compound in DMF After UV/Vis Photoexcitation

“…in 1996, [37] which for the first time showed laser‐induced demagnetization in ferromagnetic Ni in the subpicosecond regime was the starting point of a quickly growing field and attracted great interest, [38–43] since it showed how to manipulate the spin state of magnetic materials orders of magnitude faster than before and thus opened the way to “spintronics” applications (i. e., logic devices in which the spin rather than the charge of the electrons take over the role of the information carrier) [44–48] . This promising perspective among others also launched investigation of many different functionalities based on Λ processes (i. e., electronic excitation of a system to an intermediate state immediately followed by a deexcitation to a different state than the original one, all with a single laser pulse) and the applicability on real, synthesized structures [35,49–51] . Furthermore, also more complicated processes, such as the V and the four‐photon M processes (the letters Λ, V, and M roughly indicate the energy positions of the involved electronic states), also in conjunction with bath reservoirs, have been investigated [52,53] .…”

“…[44][45][46][47][48] This promising perspective among others also launched investigation of many different functionalities based on Λ processes (i. e., electronic excitation of a system to an intermediate state immediately followed by a deexcitation to a different state than the original one, all with a single laser pulse) and the applicability on real, synthesized structures. [35,[49][50][51] Furthermore, also more complicated processes, such as the V and the four-photon M processes (the letters Λ, V, and M roughly indicate the energy positions of the involved electronic states), also in conjunction with bath reservoirs, have been investigated. [52,53] Note that slow direct relaxation is a prerequisite for the success of the coherent Λ, V, and M processes, corroborating the joint role of f and d electrons in these types of systems.…”

Laser-induced ultrafast spin-transfer processes in non-linear zigzag carbon chain systems

“…38 Lefkidis et al suggested a functional topological spin-charge gearbox based on the real synthesized Co 3 Ni(EtOH) cluster driven with laser pulses. 39,40 Jin et al investigated the laser-induced ultrafast spin dynamics employing first-principles theory, and as a result, they were able to produce a variety of spin-flip and transfer scenarios in magnetic dimers. 41,42 Motivated by the capacity of the spin to serve as an information tool, [43][44][45][46] it is now feasible to significantly speed up magnetic response and data processing by ultrafast laser manipulation of magnetization, 10,[47][48][49][50][51] and the desired magnetic-logic components could be reduced in size using molecular systems.…”

Laser-Controlled Implementation of Controlled-NOT, Hadamard, SWAP, and Pauli Gates as Well as Generation of Bell States in a 3d–4f Molecular Magnet

“…Quantum superposition of many-body states can be realized by laser-induced Λ processes. 65 A quantum superposition of two states is necessary to achieve quantum parallelism and constitutes a vital tool to process meaningful information. 66 A Hadamard transformation is crucial in executing quantum algorithms like the Deutsche−Jozsa or the Bernstein−Vaziranni algorithms.…”

“…Returning to the real molecular magnet , we now discuss the quantum logic gates with quantum operations which achieve the Bell state. Quantum superposition of many-body states can be realized by laser-induced Λ processes . A quantum superposition of two states is necessary to achieve quantum parallelism and constitutes a vital tool to process meaningful information .…”