Publications by Satoshi Ejima



Contents



Preprints

  1. Probabilistic imaginary-time evolution in state-vector-based and shot-based simulations and on quantum devices
    S. Ejima, K. Seki, B. Fauseweh and S. Yunoki
    E-print: arXiv:2504.04958

  2. Radiative Higgs mode in photoinduced η pairs
    S. Ejima and B. Fauseweh
    E-print: arXiv:2409.04604



Peer-reviewed articles

  1. Ground-state properties of the $t$-$J$ model for the CuO double-chain structure
    T. Kaneko, S. Ejima, K. Sugimoto and K. Kuroki
    J. Phys. Soc. Jpn. 93, 084703 (2024)
    E-print: arXiv:2407.16325

  2. Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
    K. Sugimoto and S. Ejima
    Phys. Rev. B 108, 195128 (2023)
    E-print: arXiv:2305.09909

  3. Entanglement analysis of photoinduced đťś‚-pairing states
    S. Ejima, F. Lange, and H. Fehske
    Eur. Phys. J. Spec. Top. 232, 3479 (2023)

  4. Photoinduced metallization of excitonic insulators
    S. Ejima, F. Lange, and H. Fehske
    Phys. Rev. B 105, 245126 (2022)
    E-print: arXiv:2204.09085

  5. Nonequilibrium dynamics in pumped Mott insulators
    S. Ejima, F. Lange, and H. Fehske
    Phys. Rev. Res. 4, L012012 (2022)
    E-print: arXiv:2110.08574

  6. Spin-charge conversion and current vortex in spin-orbit coupled systems
    J. Fujimoto, F. Lange, S. Ejima, T. Shirakawa, H. Fehske, S. Yunoki and S. Maekawa
    APL Materials 9, 060904 (2021)
    E-print: arXiv:2103.06540

  7. Quantum criticality in dimerised anisotropic spin-1 chains
    S. Ejima, F. Lange and H. Fehske
    Eur. Phys. J. Spec. Top. 230, 1009 (2021)
    E-print: arXiv:2104.06649

  8. Generation of current vortex by spin current in Rashba systems
    F. Lange, S. Ejima, J. Fujimoto, T. Shirakawa, H. Fehske, S. Yunoki and S. Maekawa
    Phys. Rev. Lett. 126, 157202 (2021)
    E-print: arXiv:2011.08574
    Press release 1
    Press release 2 (in japanese)

  9. Finite-temperature photoemission in the extended Falicov-Kimball model: a case study for Ta2NiSe5
    S. Ejima, F. Lange and H. Fehske
    SciPost Phys. 10, 077 (2021)
    E-print: arXiv:2101.02479

  10. Photoinduced η-pairing at finite temperatures
    S. Ejima, T. Kaneko, F. Lange, S. Yunoki and H. Fehske
    Phys. Rev. Research 2, 032008(R) (2020)
    E-print: arXiv:2007.04636

  11. Block-Lanczos Density-Matrix Renormalization-Group Approach to Spin Transport in Heisenberg Chains Coupled to Leads
    F. Lange, S. Ejima, T. Shirakawa, S. Yunoki and H. Fehske
    J. Phys. Soc. Jpn. 89, 044601 (2020)
    E-print: arXiv:2001.02926

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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)
    E-print: arXiv:1810.02195

  17. 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

  18. 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

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

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

  21. 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)
    E-print: arXiv:1604.01228

  22. 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

  23. 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

  24. 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

  25. Dynamical correlation functions for the one-dimensional Bose-Hubbard insulator
    K. zu MĂĽnster, F. Gebhard, S. Ejima, and H. Fehske
    Phys. Rev. A 89, 063623 (2014)
    E-print: arXiv:2507.03125

  26. 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

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

  28. 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

  29. 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

  30. 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

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

  32. 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

  33. 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

  34. 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

  35. 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

  36. 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

  37. 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

  38. 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

  39. 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

  40. 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

  41. 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

  42. 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

  43. 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

  44. 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

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

  46. 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. Photoinduced pairing in Mott insulators
    Satoshi Ejima and Holger Fehske
    SciPost Phys. Proc. 11, 009 (2023)
    E-print: arXiv::2003.10818

  2. Photoinduced η-pairing in One-dimensional Mott Insulators
    S. Ejima, T. Kaneko, F. Lange, S. Yunoki, and Holger Fehske
    JPS Conf. Proc. 30, 011184 (2020)
    E-print: arXiv::2003.10818

  3. 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

  4. 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)

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

  6. 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

  7. 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

  8. 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

  9. 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

  10. Ground-state properties of the one-dimensional extended Hubbard model at half filling
    S. Ejima and S. Nishimoto
    J. Phys. Chem. Solids 69, 3293-3296 (2008)

  11. 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)

  12. Luttinger-liquid exponent in the vicinity of charge-density wave instabilities
    S. Ejima, F. Gebhard and S. Nishimoto
    J. Magn. Magn. Mater. 310, 996-998 (2007)

  13. 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)

  14. 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)

  15. 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)

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



Habilitation



Dissertation