Steady-state spectra, current and stability diagram of a quantum dot: a non-equilibrium Variational Cluster Approach release_ygq3n72adzgsvil7p475c6q2ci

by Martin Nuss, Christoph Heil, Martin Ganahl, Michael Knap, Hans Gerd Evertz, Enrico Arrigoni, Wolfgang von der Linden

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abstracts[] {'sha1': '3c68954e19dbd9d08689056a87da959baf19f6ed', 'content': 'We calculate steady-state properties of a strongly correlated quantum dot\nunder voltage bias by means of non-equilibrium Cluster Perturbation Theory and\nthe non-equilibrium Variational Cluster Approach, respectively. Results for the\nsteady-state current are benchmarked against data from accurate Matrix Product\nState based time evolution. We show that for low to medium interaction\nstrength, non-equilibrium Cluster Perturbation Theory already yields good\nresults, while for higher interaction strength the self-consistent feedback of\nthe non-equilibrium Variational Cluster Approach significantly enhances the\naccuracy. We report the current-voltage characteristics for different\ninteraction strengths. Furthermore we investigate the non-equilibrium local\ndensity of states of the quantum dot and illustrate that within the variational\napproach a linear splitting and broadening of the Kondo resonance is predicted\nwhich depends on interaction strength. Calculations with applied gate voltage,\naway from particle hole symmetry, reveal that the maximum current is reached at\nthe crossover from the Kondo regime to the doubly-occupied or empty quantum\ndot. Obtained stability diagrams compare very well to recent experimental data\n[Phys. Rev. B, 84, 245316 (2011)].', 'mimetype': 'text/plain', 'lang': 'en'}
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{'index': 1, 'creator_id': None, 'creator': None, 'raw_name': 'Christoph Heil', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 2, 'creator_id': None, 'creator': None, 'raw_name': 'Martin Ganahl', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 3, 'creator_id': None, 'creator': None, 'raw_name': 'Michael Knap', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 4, 'creator_id': None, 'creator': None, 'raw_name': 'Hans Gerd\n Evertz', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 5, 'creator_id': None, 'creator': None, 'raw_name': 'Enrico Arrigoni', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
{'index': 6, 'creator_id': None, 'creator': None, 'raw_name': 'Wolfgang von der Linden', 'given_name': None, 'surname': None, 'role': 'author', 'raw_affiliation': None, 'extra': None}
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release_date 2012-10-16
release_stage accepted
release_type article
release_year 2012
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title Steady-state spectra, current and stability diagram of a quantum dot: a non-equilibrium Variational Cluster Approach
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arxiv.base_id 1207.5641
arxiv.categories ['cond-mat.str-el', 'cond-mat.mes-hall']
arxiv.comments 13 pages, 7 figures
arxiv.journal_ref Phys. Rev. B 86, 245119 (2012)