Zobrazeno 1 - 9
of 9
pro vyhledávání: '"S. N. Saadatmand"'
Publikováno v:
Physical Review Letters. 130
The Heisenberg limit to laser coherence $\mathfrak{C}$ -- the number of photons in the maximally populated mode of the laser beam -- is the fourth power of the number of excitations inside the laser. We generalize the previous proof of this upper bou
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https://doi.org/10.1103/physrevlett.130.183602
https://doi.org/10.1103/physrevlett.130.183602
Recently it has been shown that it is possible for a laser to produce a stationary beam with a coherence (quantified as the mean photon number at spectral peak) which scales as the fourth power of the mean number of excitations stored within the lase
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a02ee22d34df06febcea93c00dc5a22
http://arxiv.org/abs/2208.14082
http://arxiv.org/abs/2208.14082
Autor:
S. N. Saadatmand
Publikováno v:
Journal of Physics: Condensed Matter. 32:355901
Understanding extreme non-locality in many-body quantum systems can help resolve questions in thermostatistics and laser physics. The existence of symmetry selection rules for Hamiltonians with non-decaying terms on infinite-size lattices can lead to
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2384b4a058d426cec57d85a3c7b39489
https://doi.org/10.1088/1361-648x/ab88f9
https://doi.org/10.1088/1361-648x/ab88f9
The standard formulation of thermostatistics, being based on the Boltzmann-Gibbs distribution and logarithmic Shannon entropy, describes idealized uncorrelated systems with extensive energies and short-range interactions. In this letter, we use the f
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Obtaining quantitative ground-state behavior for geometrically-frustrated quantum magnets with long-range interactions is challenging for numerical methods. Here, we demonstrate that the ground states of these systems on two-dimensional lattices can
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http://arxiv.org/abs/1802.00422
http://arxiv.org/abs/1802.00422
Autor:
S. N. Saadatmand
In spin lattices, frustration happens when there exists a competition between different terms of the Hamiltonian, which cannot be simultaneously minimized in all local physical bases. Frustration can destabilize the bipartite Neel order, which is the
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https://doi.org/10.14264/uql.2017.733
https://doi.org/10.14264/uql.2017.733
Autor:
Ian P. McCulloch, S. N. Saadatmand
We present new numerical tools to analyze symmetry-broken phases in the context of $SU(2)$-symmetric translation-invariant matrix product states (MPS) and density-matrix renormalization-group (DMRG) methods for infinite cylinders, and determine the p
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d456992e27a0fe20cbe32d5a7e337d12
Autor:
Ian P. McCulloch, S. N. Saadatmand
Publikováno v:
Physical Review B. 94
Using density-matrix renormalization-group calculations for infinite cylinders, we elucidate the properties of the spin-liquid phase of the spin-$\frac{1}{2}\phantom{\rule{4pt}{0ex}}{J}_{1}\text{\ensuremath{-}}{J}_{2}$ Heisenberg model on the triangu
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https://doi.org/10.1103/physrevb.94.121111
https://doi.org/10.1103/physrevb.94.121111
Publikováno v:
Physical Review B. 91
We study the phase diagram of the frustrated Heisenberg model on the triangular lattice with nearest- and next-nearest-neighbor spin-exchange coupling, on three-leg ladders. Using the density-matrix renormalization-group method, we obtain the complet
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https://explore.openaire.eu/search/publication?articleId=doi_________::7f0311620ed36870839bf8da301ee63f
https://doi.org/10.1103/physrevb.91.245119
https://doi.org/10.1103/physrevb.91.245119