scholarly journals Quantum dynamical simulation of intramolecular singlet fission in covalently coupled pentacene dimers

2019 ◽  
Vol 151 (4) ◽  
pp. 044307 ◽  
Author(s):  
S. Rajagopala Reddy ◽  
Pedro B. Coto ◽  
Michael Thoss
Keyword(s):  
Singlet Fission ◽  
Quantum Dynamical ◽  
Dynamical Simulation

scholarly journals Intramolecular Singlet Fission: Insights from Quantum Dynamical Simulations

2018 ◽  
Vol 9 (20) ◽  
pp. 5979-5986 ◽  
Author(s):  
S. Rajagopala Reddy ◽  
Pedro B. Coto ◽  
Michael Thoss
Keyword(s):  
Singlet Fission ◽  
Quantum Dynamical ◽  
Dynamical Simulations

scholarly journals Quantum Dynamical Simulation of a Transversal Stern–Gerlach Interferometer

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1660
Author(s):  
Mikołaj M. Paraniak ◽  
Berthold-Georg Englert
Keyword(s):  
Magnetic Field ◽  
Quantum Dynamics ◽  
Numerical Study ◽  
Thought Experiment ◽  
Fundamental Question ◽  
Original Form ◽  
Experimental Control ◽  
Quantum Dynamical ◽  
Dynamical Simulation ◽  
Theoretical Analyses

Originally conceived as a thought experiment, an apparatus consisting of two Stern–Gerlach apparatuses joined in an inverted manner touched on the fundamental question of the reversibility of evolution in quantum mechanics. Theoretical analysis showed that uniting the two partial beams requires an extreme level of experimental control, making the proposal in its original form unrealizable in practice. In this work, we revisit the above question in a numerical study concerning the possibility of partial-beam recombination in a spin-coherent manner. Using the Suzuki–Trotter numerical method of wave propagation and a configurable, approximation-free magnetic field, a simulation of a transversal Stern–Gerlach interferometer under ideal conditions is performed. The result confirms what has long been hinted at by theoretical analyses: the transversal Stern–Gerlach interferometer quantum dynamics is fundamentally irreversible even when perfect control of the associated magnetic fields and beams is assumed.

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