Pairing correlations and eigenvalues of two-body density matrix in atomic nuclei
Sign Up to like & getrecommendations! Published in 2020 at "Annals of Physics"
DOI: 10.1016/j.aop.2019.168061
Abstract: The quantum phases of superconductivity and superfluidity are characterised mathematically by the Yang concept of Off-Diagonal Long Range Order (ODLRO), related to the existence of a large eigenvalue of the density matrix. We analyse how… read more here.
Keywords: density; atomic nuclei; density matrix; two body ... See more keywords
Many Body Density of States of a system of non interacting spinless fermions
Sign Up to like & getrecommendations! Published in 2022 at "New Journal of Physics"
DOI: 10.1088/1367-2630/acd8e5
Abstract: The modeling of out-of-equilibrium many-body quantum systems requires to go beyond low-energy physics and single or few bodies densities of states. Many-body localization, presence or lack of thermalization and quantum chaos are examples of phenomena… read more here.
Keywords: many body; non interacting; density states; body density ... See more keywords
Preserving the Hermiticity of the one-body density matrix for a non-interacting Fermi gas
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/ad74be
Abstract: The one-body density matrix (ODM) for a zero temperature non-interacting Fermi gas can be approximately obtained in the semiclassical regime through different ℏ-expansion techniques. One would expect that each method of approximating the ODM should… read more here.
Keywords: one body; body density; non interacting; interacting fermi ... See more keywords
Many-body density of states of bosonic and fermionic gases: a combinatorial approach
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/adae68
Abstract: We use a combinatorial approach to obtain exact expressions for the many-body density of states of fermionic and bosonic gases with equally spaced single-particle spectra. We identify a mapping that reveals a remarkable property, namely,… read more here.
Keywords: density states; body density; many body; combinatorial approach ... See more keywords
One-body density matrix and momentum distribution of strongly interacting one-dimensional spinor quantum gases
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DOI: 10.1103/physreva.95.051602
Abstract: The one-body density matrix (OBDM) of a strongly interacting spinor quantum gas in one dimension can be written as a summation of products of spatial and spin parts. We find that there is a remarkable… read more here.
Keywords: momentum distribution; spinor; body density; one body ... See more keywords
Body condition changes at sea: Onboard calculation and telemetry of body density in diving animals
Sign Up to like & getrecommendations! Published in 2023 at "Methods in Ecology and Evolution"
DOI: 10.1111/2041-210x.14089
Abstract: The ability of marine mammals to accumulate sufficient lipid energy reserves is vital for mammals' survival and successful reproduction. However, long‐term monitoring of at‐sea changes in body condition, specifically lipid stores, has only been possible… read more here.
Keywords: body condition; changes body; body density; body ... See more keywords