Efimov-like phase of a three-stranded DNA and the renormalization-group limit cycle

Efimov-like phase of a three-stranded DNA and the renormalization-group limit cycle

A three-stranded DNA with short range base pairings only is known to exhibit a classical analog of the quantum Efimov effect, viz., a three-chain bound state at the two-chain melting point where no two are bound. By using a nonperturbative renormalization-group method for a rigid duplex DNA and a fl...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2015-04, Vol.91 (4), p.042105-042105, Article 042105
Hauptverfasser: Pal, Tanmoy, Sadhukhan, Poulomi, Bhattacharjee, Somendra M
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Sprache:eng
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DNA - chemistry
Models, Chemical
Models, Genetic
Nucleic Acid Conformation
Polymers - chemistry
Transition Temperature
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Sadhukhan, Poulomi
Bhattacharjee, Somendra M
description A three-stranded DNA with short range base pairings only is known to exhibit a classical analog of the quantum Efimov effect, viz., a three-chain bound state at the two-chain melting point where no two are bound. By using a nonperturbative renormalization-group method for a rigid duplex DNA and a flexible third strand, with base pairings and strand exchange, we show that the Efimov-DNA is associated with a limit cycle type behavior of the flow of an effective three-chain interaction. The analysis also shows that thermally generated bubbles play an essential role in producing the effect. A toy model for the flow equations shows the limit cycle in an extended three-dimensional parameter space of the two-chain coupling and a complex three-chain interaction.
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subjects DNA - chemistry
Models, Chemical
Models, Genetic
Nucleic Acid Conformation
Polymers - chemistry
Transition Temperature
title Efimov-like phase of a three-stranded DNA and the renormalization-group limit cycle
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