@article {ISI:000457058500007,
title = {Fractional Josephson effect with and without Majorana zero modes},
journal = {Phys. Rev. B},
volume = {99},
number = {3},
year = {2019},
month = {JAN 29},
pages = {035312},
publisher = {AMER PHYSICAL SOC},
type = {Article},
abstract = {It is known that the low-energy physics of the Josephson effect in the presence of Majorana zero modes exhibits a 4 pi periodicity as the Aharonov-Bohm flux varies in contrast to the 2 pi Josephson periodicity in usual superconducting junctions. We study this fractional Josephson effect in one-dimensional topological superconductors in Majorana nanowire systems by focusing on the features of the phase-energy relations in a superconducting semiconductor nanowire with spin-orbital coupling by including different factors operational in experimental systems, such as short wire length, suppression of superconducting gap, and the presence of an Andreev bound state. We show that even in the absence of the Majorana zero modes, some nontopological physical effects can manifest a 4 pi periodicity of the phase-energy relation in the Josephson junction, thus providing an alternative physics for fractional Josephson effect with no underlying Majorana zero modes. Furthermore, we consider several scenarios of inhomogeneous chemical potential distributions in the superconducting nanowire leading to four Majorana bound states and construct the effective four-Majorana model to correctly describe the low-energy theory of the Josephson effect. In this setup, multiple Majorana zero modes can also have the 4 pi fractional Josephson effect, although the underlying physics arises from Andreev bound states since two close-by Majorana bound states effectively form Andreev bound states. Our work demonstrates that the mere observation of a fractional Josephson effect simulating 4 pi periodicity might not, by itself, be taken as the definitive evidence for topological superconductivity. This finding has important implications for the ongoing search for non-Abelian Majorana zero modes and efforts for developing topological qubits.},
issn = {2469-9950},
doi = {10.1103/PhysRevB.99.035312},
author = {Chiu, Ching-Kai and S. Das Sarma}
}
@article { ISI:000446554000001,
title = {Failure of Kohn{\textquoteright}s theorem and the apparent failure of the f-sum rule in intrinsic Dirac-Weyl materials in the presence of a filled Fermi sea},
journal = {PHYSICAL REVIEW B},
volume = {98},
number = {15},
year = {2018},
month = {OCT 5},
pages = {155112},
issn = {2469-9950},
doi = {10.1103/PhysRevB.98.155112},
author = {Throckmorton, Robert E. and S. Das Sarma}
}
@article { ISI:000415568700001,
title = {Fast pulse sequences for dynamically corrected gates in singlet-triplet qubits},
journal = {PHYSICAL REVIEW B},
volume = {96},
number = {19},
year = {2017},
month = {NOV 17},
issn = {2469-9950},
doi = {10.1103/PhysRevB.96.195424},
author = {Throckmorton, Robert E. and Zhang, Chengxian and Yang, Xu-Chen and Wang, Xin and Barnes, Edwin and S. Das Sarma}
}
@article { ISI:000379647900004,
title = {Fast control of semiconductor qubits beyond the rotating-wave approximation},
journal = {PHYSICAL REVIEW A},
volume = {94},
number = {1},
year = {2016},
month = {JUL 14},
issn = {2469-9926},
doi = {10.1103/PhysRevA.94.012321},
author = {Song, Yang and Kestner, J. P. and Wang, Xin and S. Das Sarma}
}
@article { ISI:000333559400002,
title = {Ferromagnetic response of a {\textquoteleft}{\textquoteleft}high-temperature{{\textquoteright}{\textquoteright}} quantum antiferromagnet},
journal = {PHYSICAL REVIEW B},
volume = {89},
number = {12},
year = {2014},
month = {MAR 31},
pages = {121118},
issn = {1098-0121},
doi = {10.1103/PhysRevB.89.121118},
author = {Wang, Xin and Sensarma, Rajdeep and S. Das Sarma}
}
@article { ISI:000314683100005,
title = {Finite temperature inelastic mean free path and quasiparticle lifetime in graphene},
journal = {Phys. Rev. B},
volume = {87},
number = {8},
year = {2013},
month = {FEB 5},
issn = {1098-0121},
doi = {10.1103/PhysRevB.87.085406},
author = {Li, Qiuzi and S. Das Sarma}
}
@article { ISI:000286768100007,
title = {Fractional quantum Hall effects in bilayers in the presence of interlayer tunneling and charge imbalance},
journal = {PHYSICAL REVIEW B},
volume = {82},
number = {23},
year = {2010},
month = {DEC 9},
issn = {1098-0121},
doi = {10.1103/PhysRevB.82.235312},
author = {Peterson, Michael R. and Papic, Z. and S. Das Sarma}
}
@article { ISI:000274664500043,
title = {Fractional Quantum Hall State at nu=5/2 and the Moore-Read Pfaffian},
journal = {PHYSICAL REVIEW LETTERS},
volume = {104},
number = {7},
year = {2010},
month = {FEB 19},
issn = {0031-9007},
doi = {10.1103/PhysRevLett.104.076803},
author = {Storni, M. and Morf, R. H. and S. Das Sarma}
}
@article {Lee2010,
title = {F-wave pairing of cold atoms in optical lattices},
journal = {Phys. Rev. A},
volume = {82},
number = {5},
year = {2010},
month = {nov},
keywords = {2010, Single Fellow},
issn = {1050-2947},
url = {http://pra.aps.org/abstract/PRA/v82/i5/e053611},
author = {Lee, Wei-Cheng and Wu, Congjun and S. Das Sarma}
}
@article { ISI:000257424700054,
title = {Finite-layer thickness stabilizes the Pfaffian state for the 5/2 fractional quantum Hall effect: Wave function overlap and topological degeneracy},
journal = {PHYSICAL REVIEW LETTERS},
volume = {101},
number = {1},
year = {2008},
month = {JUL 4},
issn = {0031-9007},
doi = {10.1103/PhysRevLett.101.016807},
author = {Peterson, Michael. R. and Jolicoeur, Th. and S. Das Sarma}
}
@article {Wu2007,
title = {Flat Bands and Wigner Crystallization in the Honeycomb Optical Lattice},
journal = {Phys. Rev. Lett.},
volume = {99},
number = {7},
year = {2007},
month = {aug},
keywords = {2007, Single Fellow},
issn = {0031-9007},
url = {http://prl.aps.org/abstract/PRL/v99/i7/e070401},
author = {Wu, Congjun and Doron L. Bergman and Balents, Leon and S. Das Sarma}
}