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Quantum phase transitions and persistent currents in Josephson-junction ladders
2003
Physical Review B (Condensed Matter)
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In this work we study quantum phase transitions and persistent currents in capacitively coupled one-dimensional Josephson-junction arrays. We will focus particularly on the roles of exciton-like pairs in the strong coupling limit in the presence of external gate charges and magnetic fluxes. We use the numerical density-matrix renormalization group method for the study in the full range of values of gate charge and magnetic flux. To clarify the various effects, we report the pair correlation
doi:10.1103/physrevb.68.144506
fatcat:zuexipmywbg5rk27r5ifypy5g4