The European Physical Journal A最新文献

{"title":"Validity of scaling property and iso-centrifugal approximation in quasielastic barrier distribution: the first experimental verification","authors":"Rohan Biswas,&nbsp;S. Nath,&nbsp;J. Gehlot,&nbsp; Gonika,&nbsp;Chandra Kumar,&nbsp;A. Parihari,&nbsp;N. Madhavan,&nbsp;A. Vinayak,&nbsp;Amritraj Mahato,&nbsp;Shoaib Noor,&nbsp;Phurba Sherpa","doi":"10.1140/epja/s10050-024-01380-w","DOIUrl":"10.1140/epja/s10050-024-01380-w","url":null,"abstract":"<div><p>For the first time, we have simultaneously measured fusion and quasielastic excitation functions for an intermediate mass system for angular momentum, <span>(ell sim 0)</span> using a recoil mass spectrometer. We have extracted barrier distributions using three different sets of data recorded simultaneously for the reaction <span>(^{16})</span>O+<span>(^{142})</span>Ce: (a) fusion excitation function from measurement of evaporation residues at angle, <span>(theta _{text {lab}} = 0^{circ })</span>, (b) quasielastic excitation function at center of mass scattering angle, <span>(theta _{text {c.m.}} = pi )</span> via measurement of scattered target-like ions at <span>(theta _{text {lab}} = 0^{circ })</span> and (c) quasielastic excitation functions from measurement of scattered projectile-like ions at two large angles. We show that the four barrier distributions yield nearly identical results with a single peak. However, the centroids of the barriers extracted from quasielastic data at large angles are lower by <span>(sim 600)</span> keV compared to the same of the barriers extracted from fusion and quasielastic data for <span>(ell sim 0)</span>. This is the first experimental verification of the validity of scaling property with respect to <span>(ell )</span> and iso-centrifugal approximation in extracting fusion barrier distribution from quasielastic scattering. This work also points to the importance of extracting barrier distribution from quasielastic measurements at <span>(theta _{mathrm {c.m.}} = pi )</span> for systems for which measuring fusion excitation function with high precision is not feasible.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141865034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inverse-scattering separable NN potential constrained to phase-shift data up to 2.5 GeV. I.—Uncoupled states","authors":"H. F. Arellano,&nbsp;N. A. Adriazola","doi":"10.1140/epja/s10050-024-01367-7","DOIUrl":"10.1140/epja/s10050-024-01367-7","url":null,"abstract":"<div><p>We introduce a new method to construct, within inverse-scattering theory, an energy-independent separable potential capable of reproducing exactly both phase shift and absorption over a predefined energy range. The approach relies on the construction of non-overlapping multi-rank separable potentials, whose form factors are obtained by solving linear equations on intervals where the <i>K</i> matrix does have zeros. Applications are made to nucleon–nucleon <i>(NN)</i> interactions constrained to the SAID-SP07 phase-shift analysis up to 2.5 GeV lab energy. The inversion potentials are channel dependent with rank dictated by the number of zeros of the <i>K</i> matrix, reproducing the data up to a selected upper momentum. The account for absorption yields complex separable form factors, resulting in a non-Hermitian potential. Applications are restricted to <i>NN</i> spin-uncoupled states considering a Schrödinger-like wave equation with minimal relativity. Its extension to spin-coupled states and relativistic kernels are discussed.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141865033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of quasi-projectile properties at Fermi energies in (^{48})Ca projectile systems","authors":"FAZIA Collaboration,&nbsp;S. Upadhyaya,&nbsp;K. Mazurek,&nbsp;T. Kozik,&nbsp;D. Gruyer,&nbsp;G. Casini,&nbsp;S. Piantelli,&nbsp;L. Baldesi,&nbsp;S. Barlini,&nbsp;B. Borderie,&nbsp;R. Bougault,&nbsp;A. Camaiani,&nbsp;C. Ciampi,&nbsp;M. Cicerchia,&nbsp;M. Ciemała,&nbsp;D. Dell’Aquila,&nbsp;J. A. Dueñas,&nbsp;Q. Fable,&nbsp;J. D. Frankland,&nbsp;F. Gramegna,&nbsp;M. Henri,&nbsp;B. Hong,&nbsp;A. Kordyasz,&nbsp;M. J. Kweon,&nbsp;N. Le Neindre,&nbsp;I. Lombardo,&nbsp;O. Lopez,&nbsp;T. Marchi,&nbsp;S. H. Nam,&nbsp;J. Park,&nbsp;M. Pârlog,&nbsp;G. Pasquali,&nbsp;S. Valdré,&nbsp;G. Verde,&nbsp;E. Vient,&nbsp;M. Vigilante","doi":"10.1140/epja/s10050-024-01369-5","DOIUrl":"10.1140/epja/s10050-024-01369-5","url":null,"abstract":"<div><p>A systematic analysis of the data obtained by the FAZIA collaboration during a recent experiment with a neutron rich projectile is presented. The main goal was to compare the experimental results with the HIPSE event generator simulations to investigate the influence of the neutron rich entrance channel on the quasi-projectile fragment properties. The full isotopic range of charged particles detected in this experiment was within the limit of the resolution of the FAZIA detector. A majority of quasi-projectile fragments were detected thanks to the forward angular acceptance of the experimental setup which was confirmed through the HIPSE calculations. Essentially, the lowering of <i>N</i>/<i>Z</i> of quasi-projectile fragments with the beam energy was found to be present since the initial phase of the reaction. Thus, pre-equilibrium neutron emissions might be a possible candidate to explain such an effect.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01369-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hadron production and propagation in pion-induced reactions on nuclei","authors":"HADES collaboration,&nbsp;R. Abou Yassine,&nbsp;J. Adamczewski-Musch,&nbsp;O. Arnold,&nbsp;E. T. Atomssa,&nbsp;M. Becker,&nbsp;C. Behnke,&nbsp;J. C. Berger-chen,&nbsp;A. Blanco,&nbsp;C. Blume,&nbsp;M. Böhmer,&nbsp;L. Chlad,&nbsp;P. Chudoba,&nbsp;I. Ciepał,&nbsp;S. Deb,&nbsp;C. Deveaux,&nbsp;D. Dittert,&nbsp;J. Dreyer,&nbsp;E. Epple,&nbsp;L. Fabbietti,&nbsp;P. Fonte,&nbsp;C. Franco,&nbsp;J. Friese,&nbsp;I. Fröhlich,&nbsp;J. Förtsch,&nbsp;T. Galatyuk,&nbsp;J. A. Garzón,&nbsp;R. Gernhäuser,&nbsp;R. Greifenhagen,&nbsp;M. Grunwald,&nbsp;M. Gumberidze,&nbsp;S. Harabasz,&nbsp;T. Heinz,&nbsp;T. Hennino,&nbsp;C. Höhne,&nbsp;F. Hojeij,&nbsp;R. Holzmann,&nbsp;M. Idzik,&nbsp;B. Kämpfer,&nbsp;K.-H. Kampert,&nbsp;B. Kardan,&nbsp;V. Kedych,&nbsp;I. Koenig,&nbsp;W. Koenig,&nbsp;M. Kohls,&nbsp;J. Kolas,&nbsp;B. W. Kolb,&nbsp;G. Korcyl,&nbsp;G. Kornakov,&nbsp;R. Kotte,&nbsp;W. Krueger,&nbsp;A. Kugler,&nbsp;T. Kunz,&nbsp;R. Lalik,&nbsp;K. Lapidus,&nbsp;S. Linev,&nbsp;F. Linz,&nbsp;L. Lopes,&nbsp;M. Lorenz,&nbsp;T. Mahmoud,&nbsp;L. Maier,&nbsp;A. Malige,&nbsp;J. Markert,&nbsp;S. Maurus,&nbsp;V. Metag,&nbsp;J. Michel,&nbsp;D. M. Mihaylov,&nbsp;V. Mikhaylov,&nbsp;A. Molenda,&nbsp;C. Müntz,&nbsp;R. Münzer,&nbsp;M. Nabroth,&nbsp;L. Naumann,&nbsp;K. Nowakowski,&nbsp;J. Orliński,&nbsp;J. -H. Otto,&nbsp;Y. Parpottas,&nbsp;M. Parschau,&nbsp;C. Pauly,&nbsp;V. Pechenov,&nbsp;O. Pechenova,&nbsp;K. Piasecki,&nbsp;J. Pietraszko,&nbsp;T. Povar,&nbsp;K. Prościński,&nbsp;A. Prozorov,&nbsp;W. Przygoda,&nbsp;K. Pysz,&nbsp;B. Ramstein,&nbsp;N. Rathod,&nbsp;P. Rodriguez-Ramos,&nbsp;A. Rost,&nbsp;A. Rustamov,&nbsp;P. Salabura,&nbsp;T. Scheib,&nbsp;N. Schild,&nbsp;K. Schmidt-Sommerfeld,&nbsp;H. Schuldes,&nbsp;E. Schwab,&nbsp;F. Scozzi,&nbsp;F. Seck,&nbsp;P. Sellheim,&nbsp;J. Siebenson,&nbsp;L. Silva,&nbsp;U. Singh,&nbsp;J. Smyrski,&nbsp;S. Spataro,&nbsp;S. Spies,&nbsp;M. Stefaniak,&nbsp;H. Ströbele,&nbsp;J. Stroth,&nbsp;C. Sturm,&nbsp;K. Sumara,&nbsp;O. Svoboda,&nbsp;M. Szala,&nbsp;P. Tlusty,&nbsp;M. Traxler,&nbsp;H. Tsertos,&nbsp;I. C. Udrea,&nbsp;O. Vazquez-Doce,&nbsp;V. Wagner,&nbsp;A. A. Weber,&nbsp;C. Wendisch,&nbsp;M. G. Wiebusch,&nbsp;J. Wirth,&nbsp;A. Władyszewska,&nbsp;H. P. Zbroszczyk,&nbsp;E. Zherebtsova,&nbsp;M. Zielinski,&nbsp;P. Zumbruch,&nbsp;C. Curceanu,&nbsp;K. Piscicchia,&nbsp;A. Scordo","doi":"10.1140/epja/s10050-024-01346-y","DOIUrl":"10.1140/epja/s10050-024-01346-y","url":null,"abstract":"<div><p>Hadron production (<span>(pi ^pm )</span>, proton, <span>(Lambda )</span>, <span>(K_S^0)</span>, <span>(K^pm )</span>) in <span>(pi ^- + textrm{C})</span> and <span>(pi ^- + textrm{W})</span> collisions is investigated at an incident pion beam momentum of <span>(1.7~textrm{GeV}/c)</span>. This comprehensive set of data measured with HADES at SIS18/GSI significantly extends the existing world data on hadron production in pion induced reactions and provides a new reference for models that are commonly used for the interpretation of heavy-ion collisions. The measured inclusive differential production cross-sections are compared with state-of-the-art transport model (GiBUU, SMASH) calculations. The (semi-) exclusive channel <span>(pi ^- + A rightarrow Lambda + K_S^0 +X)</span>, in which the kinematics of the strange hadrons are correlated, is also investigated and compared to a model calculation. Agreement and remaining tensions between data and the current version of the considered transport models are discussed.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01346-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constraining the position of the CEP through the speed of sound in the LSMq","authors":"Saúl Hernández-Ortiz,&nbsp;Ricardo Martínez von Dossow,&nbsp;Alfredo Raya","doi":"10.1140/epja/s10050-024-01372-w","DOIUrl":"10.1140/epja/s10050-024-01372-w","url":null,"abstract":"<div><p>We study the chiral phase transition within the linear sigma model with quarks from its thermodynamical potential considering quantum corrections up to ring diagrams in the high-temperature regime. Demanding a second order phase transition as expected in the chiral limit at low baryon chemical potential, that the curvature of the critical line matches the one obtained in lattice simulations and that the value of the speed of sound at high temperature and zero density has its measured value, we constrain the couplings and other free parameters of the model. We set restrictions to locate the position of the critical end point in the phase diagram from a fast drop-off of the critical line reminiscent from the behavior of the speed of sound near criticality. Our results set tight constrains in parameter space for the model to exhibit realistic features.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ab initio description of monopole resonances in light- and medium-mass nuclei","authors":"A. Porro,&nbsp;T. Duguet,&nbsp;J.-P. Ebran,&nbsp;M. Frosini,&nbsp;R. Roth,&nbsp;V. Somà","doi":"10.1140/epja/s10050-024-01377-5","DOIUrl":"10.1140/epja/s10050-024-01377-5","url":null,"abstract":"<div><p>The paper is the third of a series dedicated to the ab initio description of monopole giant resonances in mid-mass closed- and open-shell nuclei via the so-called projected generator coordinate method. The present focus is on the computation of the moments <span>(m_k)</span> of the monopole strength distribution, which are used to quantify its centroid energy and dispersion. First, the capacity to compute low-order moments via two different methods is developed and benchmarked for the <span>(m_1)</span> moment. Second, the impact of the angular momentum projection on the centroid energy and dispersion of the monopole strength is analysed before comparing the results to those obtained from consistent quasi-particle random phase approximation calculations. Next, the so-called energy weighted sum rule (EWSR) is investigated. First, the appropriate ESWR in the center-of-mass frame is derived analytically. Second, the intrinsic EWSR is tested in order to quantify the (unwanted) local-gauge symmetry breaking of the presently employed chiral effective field theory (<span>(chi )</span>EFT) interactions. Finally, the infinite nuclear matter incompressibility associated with the employed <span>(chi )</span>EFT interactions is extracted by extrapolating the finite-nucleus incompressibility computed from the monopole centroid energy.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01377-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detailed study of the decay of (^{21})Mg","authors":"E. A. M. Jensen,&nbsp;S. T. Nielsen,&nbsp;A. Andreyev,&nbsp;M. J. G. Borge,&nbsp;J. Cederkäll,&nbsp;L. M. Fraile,&nbsp;H. O. U. Fynbo,&nbsp;L. J. Harkness-Brennan,&nbsp;B. Jonson,&nbsp;D. S. Judson,&nbsp;O. S. Kirsebom,&nbsp;R. Lică,&nbsp;M. V. Lund,&nbsp;M. Madurga,&nbsp;N. Marginean,&nbsp;C. Mihai,&nbsp;R. D. Page,&nbsp;A. Perea,&nbsp;K. Riisager,&nbsp;O. Tengblad","doi":"10.1140/epja/s10050-024-01376-6","DOIUrl":"10.1140/epja/s10050-024-01376-6","url":null,"abstract":"<div><p>Beta-delayed proton and gamma emission in the decay of <span>(^{21})</span>Mg has been measured at ISOLDE, CERN with the ISOLDE Decay Station (IDS) set-up. The existing decay scheme is updated, in particular what concerns proton transitions to excited states in <span>(^{20})</span>Ne. Signatures of interference in several parts of the spectrum are used to settle spin and parity assignments to highly excited states in <span>(^{21})</span>Na. The previously reported <span>(beta )</span>p<span>(alpha )</span> branch is confirmed. A half-life of 120.5(4) ms is extracted for <span>(^{21})</span>Mg. The revised decay scheme is employed to test mirror symmetry in the decay and to extract the beta strength distribution of <span>(^{21})</span>Mg that is compared with theory.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01376-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to: Effects of many-body interactions in hypernuclei with Korea-IBS-Daegu-SKKU functionals","authors":"Soonchul Choi,&nbsp;Emiko Hiyama,&nbsp;Chang Ho Hyun,&nbsp;Myung-Ki Cheoun","doi":"10.1140/epja/s10050-024-01374-8","DOIUrl":"10.1140/epja/s10050-024-01374-8","url":null,"abstract":"","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Final results of the measurement to search for rare decays of naturally occurring osmium isotopes with ultra-low background gamma-ray spectrometry","authors":"P. Belli,&nbsp;R. Bernabei,&nbsp;F. Cappella,&nbsp;V. Caracciolo,&nbsp;R. Cerulli,&nbsp;F. A. Danevich,&nbsp;V. Yu. Denisov,&nbsp;A. Incicchitti,&nbsp;D. V. Kasperovych,&nbsp;V. V. Kobychev,&nbsp;G. P. Kovtun,&nbsp;M. Laubenstein,&nbsp;D. V. Poda,&nbsp;O. G. Polischuk,&nbsp;A. P. Shcherban,&nbsp;D. A. Solopikhin,&nbsp;S. Tessalina,&nbsp;V. I. Tretyak","doi":"10.1140/epja/s10050-024-01371-x","DOIUrl":"10.1140/epja/s10050-024-01371-x","url":null,"abstract":"<div><p>A long-term measurement was conducted to search for α, double-α and double-β decays with γ quanta emission in naturally occurring osmium isotopes. This study took advantage of two ultra-low background HPGe detectors and one ultra-low background BEGe detector at the Gran Sasso National Laboratory (LNGS) of the INFN. Over almost 5 years of data were taken using high-purity osmium samples of approximately 173 g. The half-life limits set for α decays of ¹⁸⁴Os to the first 2⁺ 103.6 keV excited level of ¹⁸⁰W (<i>T</i>_1/2 ≥ 9.3 × 10¹⁵ yr) and of ¹⁸⁶Os to the first 2⁺ 100.1 keV of ¹⁸²W (<i>T</i>_1/2 ≥ 4.8 × 10¹⁷ yr) exceed substantially the present theoretical predictions that are at level of <i>T</i>_1/2 ~ (0.6–3) × 10¹⁵ yr for ¹⁸⁴Os and <i>T</i>_1/2 ~ (0.3–2) × 10¹⁷ yr for ¹⁸⁶Os. New half-life limits on the 2EC and ECβ⁺ decay of ¹⁸⁴Os to the ground and excited levels of ¹⁸⁴W were set at level of <i>T</i>_1/2 &gt; 10¹⁶–10¹⁷ yr; a lower limit on the 2β^– decay of ¹⁹²Os to the 2⁺ 316.5 keV excited level of ¹⁹²Pt was estimated as <i>T</i>_1/2 ≥ 6.1 × 10²⁰ yr. The half-life limits for 2α decay of ¹⁸⁹Os and ¹⁹²Os were set for the first time at level of <i>T</i>_1/2 &gt; 10²⁰ yr.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Demonstration of the rodeo algorithm on a quantum computer","authors":"Zhengrong Qian,&nbsp;Jacob Watkins,&nbsp;Gabriel Given,&nbsp;Joey Bonitati,&nbsp;Kenneth Choi,&nbsp;Dean Lee","doi":"10.1140/epja/s10050-024-01373-9","DOIUrl":"10.1140/epja/s10050-024-01373-9","url":null,"abstract":"<div><p>The rodeo algorithm is an efficient algorithm for eigenstate preparation and eigenvalue estimation for any observable on a quantum computer. This makes it a promising tool for studying the spectrum and structure of atomic nuclei as well as other fields of quantum many-body physics. The only requirement is that the initial state has sufficient overlap probability with the desired eigenstate. While it is exponentially faster than well-known algorithms such as phase estimation and adiabatic evolution for eigenstate preparation, it has yet to be implemented on an actual quantum device. In this work, we apply the rodeo algorithm to determine the energy levels of a random one-qubit Hamiltonian, resulting in a relative error of <span>(0.08%)</span> using mid-circuit measurements on the IBM Q device Casablanca. This surpasses the accuracy of directly-prepared eigenvector expectation values using the same quantum device. We take advantage of the high-accuracy energy determination and use the Hellmann–Feynman theorem to compute eigenvector expectation values for a different random one-qubit observable. For the Hellmann–Feynman calculations, we find a relative error of <span>(0.7%)</span>. We conclude by discussing possible future applications of the rodeo algorithm for multi-qubit Hamiltonians.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}