» Dr. Satoshi Ejima » Publications

Publications by Satoshi Ejima

Peer-reviewed articles

  1. Dynamic response of spin-2 bosons in one-dimensional optical lattices
    F. Lange, S. Ejima and H. Fehske
    Phys. Rev. A 100, 023623 (2019)
    E-print: arXiv:1905.06587

  2. Machine learning phase diagram in the half-filled one-dimensional extended Hubbard model
    K. Shinjo, K. Sasaki, S. Hase, S. Sota, S. Ejima, S. Yunoki and T. Tohyama
    J. Phys. Soc. Jpn. 88, 065001 (2019)
    E-print: arXiv:1904.06032

  3. Quantum phase transitions in the dimerized extended Bose-Hubbard model
    K. Sugimoto, S. Ejima, F. Lange and H. Fehske
    Phys. Rev. A 99, 012122 (2019)
    E-print: arXiv:1812.03489

  4. Driving XXZ spin chains: Magnetic-field and boundary effects
    F. Lange, S. Ejima and H. Fehske
    EPL 125, 17001 (2019)
    E-print: arXiv:1810.11807

  5. Exotic criticality in the dimerized spin-1 XXZ chain with single-ion anisotropy
    S. Ejima, T. Yamaguchi, F. H. L. Essler, F. Lange, Y. Ohta, and H. Fehske
    SciPost Phys. 5, 059 (2018) (received the Select label).
    E-print: arXiv:1810.02195

  6. Spin transport through a spin-1/2 XXZ chain contacted to fermionic leads
    F. Lange, S. Ejima, T. Shirakawa, S. Yunoki, and H. Fehske
    Phys. Rev. B 97, 245124 (2018)
    E-print: arXiv:1804.08957

  7. Finite-temperature dynamic structure factor of the spin-1 XXZ chain with single-ion anisotropy
    F. Lange, S. Ejima, and H. Fehske
    Phys. Rev. B 97, 060403(R) (2018)
    E-print: arXiv:1801.10572

  8. Strongly repulsive anyons in one dimension
    F. Lange, S. Ejima, and H. Fehske
    Phys. Rev. A 95, 063621 (2017)
    E-print: arXiv:1704.07197

  9. Anyonic Haldane Insulator in One Dimension
    F. Lange, S. Ejima, and H. Fehske
    Phys. Rev. Lett. 118, 120401 (2017)
    E-print: arXiv:1612.00605

  10. Ising tricriticality in the extended Hubbard model with bond dimerization
    S. Ejima, F. H. L. Essler, F. Lange, and H. Fehske
    Phys. Rev. B 93, 235118 (2016) ( Editors' Suggestion ).
    E-print: arXiv:1604.01228

  11. Criticality at the Haldane-insulator charge-density-wave quantum phase transition
    F. Lange, S. Ejima, and H. Fehske
    Phys. Rev. B 92, 041120(R) (2015).
    E-print: arXiv:1506.04003

  12. Comparative density-matrix renormalization group study of symmetry-protected topological phases in spin-1 chain and Bose-Hubbard models
    S. Ejima, and H. Fehske
    Phys. Rev. B 91, 045121 (2015).
    E-print: arXiv:1407.6393

  13. Spectral and Entanglement Properties of the Bosonic Haldane Insulator
    S. Ejima, F. Lange, and H. Fehske
    Phys. Rev. Lett. 113, 020401 (2014).
    E-print: arXiv:1407.2852

  14. Dynamical correlation functions for the one-dimensional Bose-Hubbard insulator
    K. zu Münster, F. Gebhard, S. Ejima, and H. Fehske
    Phys. Rev. A 89, 063623 (2014).

  15. Order, Criticality, and Excitations in the Extended Falicov-Kimball Model
    S. Ejima, T. Kaneko, Y. Ohta, and H. Fehske
    Phys. Rev. Lett. 112, 026401 (2014).
    E-print: arXiv:1308.0361

  16. One-dimensional Bose-Hubbard model with local three-body interactions
    S. Ejima, F. Lange, H. Fehske, F. Gebhard, and K. zu Münster
    Phys. Rev. A 88, 063625 (2013).
    E-print: arXiv:1310.4719

  17. Exact-diagonalization study of exciton condensation in electron bilayers
    T. Kaneko, S. Ejima, H. Fehske, and Y. Ohta
    Phys. Rev. B 88, 035312 (2013).
    E-print: arXiv:1305.7298

  18. Anderson localization versus charge-density-wave formation in disordered electron systems
    S. Nishimoto, S. Ejima, and H. Fehske
    Phys. Rev. B 87, 045116 (2013).
    E-print: arXiv:1210.8142

  19. Phase separation in the Edwards model
    S. Ejima, S. Sykora, K. W. Becker, and H. Fehske
    Phys. Rev. B 86, 155149 (2012).
    E-print: arXiv:1209.1810

  20. Characterization of Mott-insulating and superfluid phases in the one-dimensional Bose-Hubbard model
    S. Ejima, H. Fehske, F. Gebhard, K. zu Münster, M. Knap, E. Arrigoni, and W. von der Linden
    Phys. Rev. A 85, 053644 (2012).
    E-print: arXiv:1203.1120

  21. Discrete symmetry breaking transitions between paired superfluids
    M. J. Bhaseen, S. Ejima, F. H. L. Essler, H. Fehske, M. Hohenadler, and B. D. Simons
    Phys. Rev. A 85, 033636 (2012).
    E-print: arXiv:1111.6778

  22. Magnetic properties of the second Mott lobe in pairing Hamiltonians
    M. J. Bhaseen, S. Ejima, M. Hohenadler, A. O. Silver, F. H. L. Essler, H. Fehske, and B. D. Simons
    Phys. Rev. A 84, 023635 (2011).
    E-print: arXiv:1104.5626

  23. Dynamic properties of the one-dimensional Bose-Hubbard model
    S. Ejima, H. Fehske, and F. Gebhard
    EPL 93, 30002 (2011).
    E-print: arXiv:1102.2028

  24. Ising Deconfinement Transition between Feshbach-Resonant Superfluids
    S. Ejima, M. J. Bhaseen, M. Hohenadler, F. H. L. Essler, H. Fehske, and B. D. Simons
    Phys. Rev. Lett. 106, 015303 (2011).
    E-print: arXiv:1009.4088

  25. A Green's function decoupling scheme for the Edwards fermion-boson model
    D. M. Edwards, S. Ejima, A. Alvermann and H. Fehske
    J. Phys.: Condens. Matter 22, 435601 (2010).
    E-print: arXiv:1007.1342

  26. One-dimensional quantum transport affected by a background medium:
    Fluctuations versus correlations
    S. Ejima and H. Fehske
    Phys. Rev. B 80, 155101 (2009).
    E-print: arXiv:0909.0606
  1. Luttinger parameters and momentum distribution function for the half-filled spinless fermion Holstein model:
    A DMRG approach
    S. Ejima and H. Fehske
    EPL 87, 27001 (2009).
    E-print: arXiv:0905.1214

  2. Quantum Phase Transition in a 1D Transport Model with Boson-Affected Hopping:
    Luttinger Liquid versus Charge-Density-Wave Behavior
    S. Ejima, G. Hager, and H. Fehske
    Phys. Rev. Lett. 102, 106404 (2009).
    E-print: arXiv:0811.4271

  3. Random dispersion approximation for the Hubbard model
    S. Ejima, F. Gebhard, R. M. Noack
    Eur. Phys. J. B 66, 191-200 (2008).
    E-print: arXiv:0811.4271

  4. Phase diagram of the one-dimensional half-filled extended Hubbard model
    S. Ejima and S. Nishimoto
    Phys. Rev. Lett. 99, 216403 (2007).
    E-print: arXiv:0710.0673

  5. Tomonaga-Luttinger parameters and spin excitations in the dimerized extended Hubbard model
    S. Ejima, F. Gebhard and S. Nishimoto
    Phys. Rev. B 74, 245110 (2006).
    E-print: cond-mat/0605433

  6. Thermodynamics of the one-dimensional half-filled Hubbard model in the spin-disordered regime
    S. Ejima, F. H. L. Essler, and F. Gebhard
    J. Phys. A: Math. Gen. 39, 4845-4857 (2006).
    E-print: cond-mat/0602310

  7. Spin and charge excitations in the anisotropic Hubbard ladder at quarter filling with charge-ordering instability
    Y. Ohta, T. Nakaegawa, and S. Ejima
    Phys. Rev. B 73, 045101 (2006).
    E-print: cond-mat/0512310

  8. Tomonaga-Luttinger parameters for doped Mott insulators
    S. Ejima, F. Gebhard, and S. Nishimoto
    Europhys. Lett. 70, 492 (2005).
    E-print: cond-mat/0507508

  9. Phase diagram of the t-U-V1-V2 model at quarter filling
    S. Ejima, F. Gebhard, S. Nishimoto, and Y. Ohta
    Phys. Rev. B 72, 033101 (2005).
    E-print: cond-mat/0411151

 

Conference Proceedings

  1. Critical behavior of the extended Hubbard model with bond dimerization
    S. Ejima, F. Lange, Fabian H. L. Essler and H. Fehske
    Physica B 536, 474 (2018).
    E-print: arXiv:1706.07486

  2. Entanglement properties of the nontrivial Haldane insulator in the 1D extended Bose-Hubbard model
    S. Ejima and H. Fehske
    J. Phys.: Conf. Ser. 592, 012134 (2015).

  3. Excitonic BCS-BEC Crossover in Double-Layer Systems
    T. Kaneko, S. Ejima, H. Fehske, and Y. Ohta
    JPS Conf. Proc. 3, 017006 (2014).

  4. Charge-Density-Wave Formation in the Edwards Fermion-Boson Model at One-Third Band Filling
    S. Ejima and H. Fehske
    JPS Conf. Proc. 3, 013006 (2014).
    E-print: arXiv:1309.6873

  5. Metal-insulator transition in the Edwards model
    H. Fehske, S. Ejima, G. Wellein and A. R. Bishop
    J. Phys.: Conf. Ser. 391, 012152 (2012).
    E-print: arXiv:1110.4486
  1. Dynamic density-density correlations in interacting Bose gases on optical lattices
    S. Ejima, H. Fehske, and F. Gebhard
    J. Phys.: Conf. Ser. 391, 012143 (2012).
    E-print: arXiv:1110.4498

  2. DMRG analysis of the SDW-CDW crossover region in the 1D half-filled Hubbard-Holstein model
    S. Ejima and H. Fehske
    J. Phys.: Conf. Ser. 200, 012031 (2010).
    E-print: arXiv:0906.2355

  3. Ground-state properties of the one-dimensional extended Hubbard model at half filling
    S. Ejima and S. Nishimoto
    Journal of Physics and Chemistry of Solids 69, 3293-3296 (2008).

  4. Phase diagram of the one-dimensional extended Hubbard model with hopping dimerization
    S. Ejima, F. Gebhard and S. Nishimoto
    Physica C 460-462, 1079-1080 (2007).

  5. Luttinger-liquid exponent in the vicinity of charge-density wave instabilities
    S. Ejima, F. Gebhard and S. Nishimoto
    Journal of Magnetism and Magnetic Materials 310, 996-998 (2007).

  6. Accurate calculation of the Tomonaga-Luttinger parameter Kρ using the density-matrix renormalization group method
    S. Ejima, F. Gebhard and S. Nishimoto
    Physica B 378-380, 304 (2006).

  7. Interplay between Spin and Charge Excitations in the Coupled Spin-Pseudospin Systems
    Y. Ohta, S. Ejima, and T. Nakaegawa
    J. Low Temp. Phys. 131, 239 (2003).

  8. Anomalous Spin Excitations in a Coupled Spin-Pseudospin Model for Anisotropic Hubbard Ladders at Quarter Filling
    Y. Ohta, S. Ejima, Y. Shibata, and T. Nakaegawa
    Physica B 329-333, 996 (2003).

  9. Excitations in the Coupled Spin-Pseudospin Model for Quarter-Filled Ladders
    S. Ejima, T. Nakaegawa, and Y. Ohta
    Physica B 328, 105 (2003).

 

Dissertation