2002/02/14 by Benoît Douçot, B. Doucot, J. Vidal +1 · 1 citation
Physics and Astronomy · #Bound state #Chain (unit) #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Cooper pair #Josephson effect #Magnetic field #Magnetic flux #Magnetic flux quantum #Pairing #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Pi Josephson junction #Quantum #Quantum mechanics #Squid #Strong Light-Matter Interactions #Superconducting tunnel junction #Superconductivity #Symmetry (geometry) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.88.227005
published as Phys. Rev. Lett. 88, 227005 (2002) · 4 pages, 4 EPS figures
arxiv created 2002/02/14 · openalex publication_date 2002/05/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study a one-dimensional Josephson-junction chain embedded in a magnetic field. We show that, when the magnetic flux per elementary loop equals half the superconducting flux quantum phi0 = h/2e, a local Z2 symmetry arises. This symmetry is responsible for a nematic Luttinger liquid state associated with bound states of Cooper pairs. We analyze the phase diagram and discuss some experimental possibilities to observe this exotic phase.