Nonradiant multiphoton states in quantum ring oligomers
Arrays of coupled dipole emitters support collective single- and multiphoton states that can preserve quantum excitations. One of the crucial characteristics of these states is the lifetime, which is fundamentally limited due to spontaneous emission. Here, we present a mechanism of the external coup...
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Zusammenfassung: | Arrays of coupled dipole emitters support collective single- and multiphoton
states that can preserve quantum excitations. One of the crucial
characteristics of these states is the lifetime, which is fundamentally limited
due to spontaneous emission. Here, we present a mechanism of the external
coupling of two states via the radiation continuum, which allows for an
increase in the lifetime of both single and double excitations. As an
illustrative example, we consider a ringlike ensemble of quantum emitters,
demonstrating that upon slight optimization of the structure geometry, one can
increase the lifetime of singly and doubly excited states with nonzero orbital
momentum by several orders of magnitude. The proposed mechanism of multiphoton
excitation lifetime control has a universal nature and might be applied to a
wide class of open quantum systems and quantum ensembles besides the particular
geometry considered in this paper. |
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DOI: | 10.48550/arxiv.2309.14461 |