Video Experimental Relacionado
Updated: Jun 13, 2025
12:57
Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
9.1K
Dímero paralelo macrocíclico que muestra la coherencia cuántica de los multiexcitones del quinteto a temperatura
Wataru Ishii1, Masaaki Fuki2,3, Eman M Bu Ali4,5
1Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
Journal of the American Chemical Society
|September 9, 2024
Resumen
Los investigadores lograron la coherencia cuántica a temperatura ambiente en los qubits moleculares utilizando una nueva estrategia de dímeros paralelos macrocíclicos. Este avance permite pares de quintetos triplet enredados para aplicaciones avanzadas de la ciencia de la información cuántica.
Área de la Ciencia:
- Ciencias de la información cuántica
- La computación cuántica molecular
- Productos electrónicos orgánicos
Sus antecedentes:
- La fisión de singlet (SF) genera pares de tripletes entrelazados por espín, cruciales para las aplicaciones cuánticas.
- Lograr la coherencia cuántica a temperatura ambiente sigue siendo un desafío significativo debido al control de la dinámica de los pares triplet.
Objetivo del estudio:
- Para demostrar la coherencia cuántica a temperatura ambiente en el quinteto multiexcitones.
- Desarrollar una estrategia para el control preciso de la orientación y la dinámica de los pares triplet.
Principales métodos:
- Sintetizó un dimero paralelo macrocíclico (MPD-1) utilizando enlaces covalentes dinámicos de Schiff-base entre los derivados del pentaceno.
- Se han investigado las propiedades SF del MPD-1 en películas de poliestireno.
- Tiempo de coherencia medido (T2) del estado del quinteto.
Principales resultados:
- MPD-1 exhibe un rápido SF subpicosegundo, generando multiexcitones de quinteto polarizados por espín.
- Se logró un tiempo de coherencia largo (T2) de 648 ns para el estado de quinteto a temperatura ambiente.
- Se ha demostrado la síntesis exitosa de MPD-1 en un alto rendimiento.
Conclusiones:
- La estrategia de los dímeros paralelos macrocíclicos permite la coherencia cuántica a temperatura ambiente.
- Este enfoque ofrece una nueva vía para desarrollar qubits moleculares de varios niveles para aplicaciones cuánticas.
- Destaca el potencial de las arquitecturas moleculares a medida en el avance de las tecnologías cuánticas.
Videos de Conceptos Relacionados
02:58Crystal Field Theory - Octahedral Complexes
26.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.2K
00:52¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
815
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
815
02:45The Quantum-Mechanical Model of an Atom
42.1K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
42.1K
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
1.4K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.4K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.7K
03:02Colors and Magnetism
11.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.6K