Non-Kondo many-body physics in a Majorana-based Kondo type system
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We carry out a theoretical analysis of a prototypical Majorana system, which demonstrates the existence of a Majorana-mediated many-body state and an associated intermediate low-energy fixed point. Starting from two Majorana bound states, hosted by a Coulomb-blockaded topological superconductor and each coupled to a separate lead, we derive an effective low-energy Hamiltonian, which displays a Kondo-like character. However, in contrast to the Kondo model which tends to a strong- or weak-coupling limit under renormalization, we show that this effective Hamiltonian scales to an intermediate fixed point, whose existence is contingent upon teleportation via the Majorana modes. We conclude by determining experimental signatures of this fixed point, as well as the exotic many-body state associated with it.
Van Beek , I & Braunecker , B 2016 , ' Non-Kondo many-body physics in a Majorana-based Kondo type system ' Physical Review. B, Condensed matter and materials physics , vol 94 , no. 11 , 115416 . DOI: 10.1103/PhysRevB.94.115416
Physical Review. B, Condensed matter and materials physics
© 2016, American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at journals.aps.org / https://dx.doi.org/10.1103/PhysRevB.94.115416
IJvB acknowledges studentship funding from EPSRC under grant no. EP/I007002/1.
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