The Impact of Ligand Field Symmetry on Molecular Qubit Coherence.

Developing quantum bits (qubits) exhibiting room temperature electron spin coherence is a key goal of molecular quantum information science. At high temperatures, coherence is often limited by electron spin relaxation, measured by . Here we develop a simple and powerful model for predicting relative relaxation times in transition metal complexes from dynamic ligand field principles.

Deconvolving Contributions to Decoherence in Molecular Electron Spin Qubits: A Dynamic Ligand Field Approach.

In the past decade, transition metal complexes have gained momentum as electron spin-based quantum bit (qubit) candidates due to their synthetic tunability and long achievable coherence times. The decoherence of magnetic quantum states imposes a limit on the use of these qubits for quantum information technologies, such as quantum computing, sensing, and communication. With rapid recent development in the field of molecular quantum information science, a variety of chemical design principles for prolonging coherence in molecular transition metal qubits have been proposed.

The dynamic ligand field of a molecular qubit: decoherence through spin-phonon coupling.

Quantum coherence of S = 1/2 transition metal-based quantum bits (qubits) is strongly influenced by the magnitude of spin-phonon coupling. While this coupling is recognized as deriving from dynamic distortions about the first coordination sphere of the metal, a general model for understanding and quantifying ligand field contributions has not been established. Here we derive a general ligand field theory model to describe and quantify the nature of spin-phonon coupling terms in S = 1/2 transition metal complexes.

Cerebrovascular and neuroprotective effects of adamantane derivative.

Objectives: The influence of 5-hydroxyadamantane-2-on was studied on the rats' brain blood flow and on morphological state of brain tissue under the condition of brain ischemia. The interaction of the substance with NMDA receptors was also studied.

Methods: Study has been implemented using the methods of local blood flow registration by laser flowmeter, [(3)H]-MK-801binding, and morphological examination of the brain tissue.