Transmission of a microwave cavity coupled to localized Shiba states

2015/12/26 by Razvan Chirla, Andrei Manolescu, Cătălin Paşcu Moca +1
Computer Science · Physics and Astronomy · #Band gap #Condensed matter physics #Ground state #Josephson effect #Microwave #Microwave cavity #Phase (matter) #Phase transition #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum phase transition #Quantum state #Superconducting quantum computing #Superconductivity #Telecommunications #Topological Materials and Phenomena #Transmission (telecommunications) #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.93.155110

published as Phys. Rev. B 93, 155110 (2016) · 9 pages, 8 figures

arxiv created 2015/12/26 · openalex publication_date 2016/04/06 · arxiv updated 2016/04/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider a strongly correlated quantum dot, tunnel coupled to two superconducting leads and capacitively coupled to a single mode microwave cavity. When the superconducting gap is the largest energy scale, multiple Shiba states are formed inside the gap. The competition of these states for the ground state signals a quantum phase transition. We demonstrate that photonic measurements can be used to probe such localized Shiba states. Moreover, the quantum phase transition can be pinpointed exactly from the sudden change in the transmission signal. Calculations were performed using the numerical renormalization-group approach.

Citations

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