Resonancia Magnética: de la versatilidad en el control cuántico al sensado y las nuevas tecnologías cuánticas
; Alvarez, Gonzalo Agustin 
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Fecha
04/2026
Editorial
Asociación Argentina para el Progreso de las Ciencias
Revista
Ciencia e Investigación
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1132-0974
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Español
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Resumen
La resonancia magnética fue una de las primeras plataformasen permitir el control preciso y reproducible de sistemas cuánticos.Mucho antes de que se consolidara el concepto de tecnologíascuánticas, la RMN ya manipulaba coherentemente estados de espínmediante el diseño de secuencias de pulsos y la ingeniería efectiva deHamiltonianos, es decir, procesaba información cuántica de maneracontrolada. En este sentido, puede considerarse un antecedente sólido—y socialmente exitoso— de la segunda revolución cuántica. Ademásde su impacto en química, materiales y medicina, la RMN se convirtióen un laboratorio privilegiado para estudiar dinámica cuántica demuchos cuerpos, irreversibilidad, decoherencia y propagación de lainformación cuántica. En este artículo revisamos desarrollos históricosy contribuciones recientes, con énfasis en trabajos realizados porcientíficos en Argentina que han desempeñado un papel central enposicionar a la RMN como herramienta clave de la segunda revolucióncuántica. A través de ecos de espín y su generalización como eco deLoschmidt, ingeniería de Hamiltonianos y desacoplamiento dinámico,estos aportes permitieron investigar scrambling, termalización yprotección de la información en sistemas de espines. Asimismo,analizamos su evolución hacia el sensado cuántico avanzado, dondela decoherencia se convierte en recurso, y su integración con espineselectrónicos —como los centros NV en diamante— abre la posibilidadde nano-MRI y exploración de procesos moleculares e intracelulares. En conjunto, la resonancia magnética emerge como unatecnología cuántica madura que ha contribuido activamente a definir el paradigma contemporáneo del control y la explotaciónde sistemas cuánticos.
Magnetic resonance was one of the first platforms to enable the precise and reproducible control of quantum systems. Long before the concept of quantum technologies was consolidated, NMR was already coherently manipulating spin states through the design of pulse sequences and effective Hamiltonian engineering; that is, it processed quantum information in a controlled manner. In this sense, it can be considered a solid —and socially successful— precedent of the second quantum revolution. In addition to its impact on chemistry, materials science, and medicine, NMR became a privileged laboratory for studying quantum many-body dynamics, irreversibility, decoherence, and the propagation of quantum information. In this article, we review historical developments and recent contributions, emphasizing the work carried out by scientists in Argentina who have played a central role in positioning NMR as a key tool of the second quantum revolution. Through spin echoes and their generalization as the Loschmidt echo, Hamiltonian engineering, and dynamical decoupling, these contributions made it possible to investigate scrambling, thermalization, and information protection in spin systems. Furthermore, we analyze its evolution towards advanced quantum sensing, where decoherence becomes a resource, and its integration with electronic spins —such as NV centers in diamond— which opens up the possibility of nano-MRI and the exploration of molecular and intracellular processes. Altogether, magnetic resonance emerges as a mature quantum technology that has actively contributed to defining the contemporary paradigm for the control and exploitation of quantum systems.
Magnetic resonance was one of the first platforms to enable the precise and reproducible control of quantum systems. Long before the concept of quantum technologies was consolidated, NMR was already coherently manipulating spin states through the design of pulse sequences and effective Hamiltonian engineering; that is, it processed quantum information in a controlled manner. In this sense, it can be considered a solid —and socially successful— precedent of the second quantum revolution. In addition to its impact on chemistry, materials science, and medicine, NMR became a privileged laboratory for studying quantum many-body dynamics, irreversibility, decoherence, and the propagation of quantum information. In this article, we review historical developments and recent contributions, emphasizing the work carried out by scientists in Argentina who have played a central role in positioning NMR as a key tool of the second quantum revolution. Through spin echoes and their generalization as the Loschmidt echo, Hamiltonian engineering, and dynamical decoupling, these contributions made it possible to investigate scrambling, thermalization, and information protection in spin systems. Furthermore, we analyze its evolution towards advanced quantum sensing, where decoherence becomes a resource, and its integration with electronic spins —such as NV centers in diamond— which opens up the possibility of nano-MRI and the exploration of molecular and intracellular processes. Altogether, magnetic resonance emerges as a mature quantum technology that has actively contributed to defining the contemporary paradigm for the control and exploitation of quantum systems.
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