Quantum tunneling and its absence in deep wells and strong magnetic fields.
basic_science · Level V
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- Record sourced from PubMed, PMID 39982747.
- Also identified by DOI 10.1073/pnas.2420062122 and PMC identifier 11874270.
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Abstract
We present results on quantum tunneling between deep potential wells, in the presence of a strong constant magnetic field. We construct a family of double-well potentials containing examples for which the low-energy eigenvalue splitting vanishes, and hence quantum tunneling is eliminated. Further, by deforming within this family, the magnetic ground state can be made to transition from symmetric to antisymmetric. However, for typical double wells in a certain regime, tunneling is not suppressed, and we provide a lower bound for the eigenvalue splitting.