{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T13:44:36Z","timestamp":1775051076080,"version":"3.50.1"},"reference-count":48,"publisher":"AIP Publishing","issue":"8","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,8,1]]},"abstract":"<jats:p>A quantum hydrodynamic (QHD) model is used to investigate the propagation characteristics of nonlinear electron-acoustic solitary waves (EASWs) in a dense quantum plasma whose constituents are two groups of electrons: one inertial cold electrons and other inertialess hot electrons, and the stationary ions which form the neutralizing background. By using the standard reductive perturbation technique, a Kadomtsev-Petviashvili (KP) equation, which governs the dynamics of EASWs, is derived in both spherical and cylindrical geometry. The effects of cold electrons and the density correlations due to quantum fluctuations on the profiles of the amplitudes and widths of the solitary structures are examined numerically. The nondimensional parameter \u03b4=nc0\u2215nh0, which is the equilibrium density ratio of the cold to hot electron component, is shown to play a vital role in the formation of both bright and dark solitons. It is also found that the angular dependence of the physical quantities and the presence of cold electrons in a quantum plasma lead to the coexistence of some new interesting novel solitary structures quite distinctive from the classical ones.<\/jats:p>","DOI":"10.1063\/1.2769322","type":"journal-article","created":{"date-parts":[[2007,8,21]],"date-time":"2007-08-21T22:13:53Z","timestamp":1187734433000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":72,"title":["Electron-acoustic solitary waves in dense quantum electron-ion plasmas"],"prefix":"10.1063","volume":"14","author":[{"given":"A. P.","family":"Misra","sequence":"first","affiliation":[{"name":"Visva-Bharati University Department of Mathematics, Siksha Bhavana, , Santiniketan-731 235, India"}]},{"given":"P. K.","family":"Shukla","sequence":"additional","affiliation":[{"name":"Ruhr-Universit\u00e4t Bochum Institut f\u00fcr Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakult\u00e4t f\u00fcr Physik and Astronomie, , D-44780 Bochum, Germany, and School of Physics, , Durban 4000, South Africa"},{"name":"University of KwaZulu-Natal Institut f\u00fcr Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakult\u00e4t f\u00fcr Physik and Astronomie, , D-44780 Bochum, Germany, and School of Physics, , Durban 4000, South Africa"}]},{"given":"C.","family":"Bhowmik","sequence":"additional","affiliation":[{"name":"Barisha High School , Barisha, Kolkata-700 008, India"}]}],"member":"317","published-online":{"date-parts":[[2007,8,21]]},"reference":[{"key":"2023062213503607700_c1","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1007\/978-3-7091-6961-2_3","volume-title":"Semiconductor Equations","year":"1990"},{"key":"2023062213503607700_c2","doi-asserted-by":"publisher","first-page":"4725","DOI":"10.1103\/PhysRevE.60.4725","volume":"60","year":"1999","journal-title":"Phys. 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