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Topological Quantum Computing Superconducting Qubits

Quantum phase transitions in d-wave superconductors.

PubMed

Authors: Vojta M, Zhang Y, Sachdev S

Year

2000

Paper ID

13303

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

Citations

168

Abstract

Motivated by the strong, low temperature damping of nodal quasiparticles observed in some cuprate superconductors, we study quantum phase transitions in d(x(2)-y(2)) superconductors with a spin-singlet, zero momentum, fermion bilinear order parameter. We present a complete, group-theoretic classification of such transitions into seven distinct cases (including cases with nematic order) and analyze fluctuations by the renormalization group. We find that only two, the transitions to d(x(2)-y(2))+is and d(x(2)-y(2))+id(xy) pairing, possess stable fixed points with universal damping of nodal quasiparticles; the latter leaves the gapped quasiparticles along (1,0), (0,1) essentially undamped.

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Motivated by the strong, low temperature damping of nodal quasiparticles observed in some cuprate superconductors, we study quantum phase transitions in d(x(2)-y(2))...

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.85.4940 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/11102156/

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