5,479 research outputs found
Validity condition for high-fidelity Digitized Quantum Annealing
No full text10 pages and 4 figuresDigitizing an adiabatic evolution is a strategy able to combine the good
performance of gate-based quantum processors with the advantages of adiabatic
algorithms, providing then a hybrid model for efficient quantum information
processing. In this work we develop validity conditions for high fidelity
digital adiabatic tasks. To this end, we assume a digitizing process based on
the Suzuki-Trotter decomposition, which allows us to introduce a Digitized
Adiabatic Theorem. As consequence of this theorem, we show that the performance
of such a hybrid model is limited by the fundamental constraints on the
adiabatic theorem validity, even in ideal quantum processors. We argue how our
approach predicts the existence of intrinsic non-adiabatic errors reported by
R. Barends et al., Nature 534, 222 (2016) through an empirical study of digital
annealing. In addition, our approach allows us to explain the existence of a
scaling of the number of Suzuki-Trotter blocks for the optimal digital circuit
with respect to the optimal adiabatic total evolution time, as reported by G.
B. Mbeng et al., Phys. Rev. B 100, 224201 (2019) through robust numerical
analysis of digital annealing. We illustrate our results through two examples
of digitized adiabatic algorithms, namely, the two-qubits exact-cover problem
and the three-qubits adiabatic factorization of the number 21.The author is supported by the Comunidad de Madrid through the research funding program Talento 2024“César’ Nombela” under the Grant No. 2024-T1/COM-31530. The author acknowledges the partial support from the European Union’s Horizon 2020 FET-Open project SuperQuLAN (899354) and from Proyecto Sinérgico CAM2020 Y2020/TCS-6545(NanoQuCo-CM) from the Comunidad de Madrid.Peer reviewe
Characella luna Dias & Santos & Pinheiro 2019, sp. nov.
No full textCharacella luna sp. nov. (Fig. 1A–I; Table 1) Holotype: UFPEPOR 2150, Bacia Potiguar (04° 44.8945' S, 36° 25.4571' W), Rio Grande do Norte State, Brazil, depth 108 m, trawl, Box 37, col. PetrobraS, (23.V.2011). Description of preserved specimen (Fig. 1A). Flattened fragment of 1–3 cm thick and 12 cm length. Surface iS irregular and Strongly hiSpid. ConSiStency compreSSable to hard. OSculeS not viSible. Colour in life iS unknown and purple in ethanol. The Specimen waS collected in the Same drag aS Aiolochroia crassa (Hyatt, 1875) and Stored in the Same container. It iS poSSible that the A. crassa pigmentS diScoloured the Characella Specimen. Skeleton: (Fig. 1B). EctoSome conSiSting of a denSe layer of microSclereS and Small orthotrianeS with no particular architecture, pierced by oxeaS and the cladome of dichotriaeneS. ChoanoSomal Skeleton with oxeaS and microSclereS forming a confuSed maSS lacking orientation. SpiculeS (Fig. 1C–I). OxeaS (Fig. 1C–D): (1) long, Smooth, Slender and Slightly curved (2433.1– 3200.5 –3866.3 / 36.6– 60.6 –93.3 µm), (2) Short, Smooth, thick and curved (161– 183.5 –209.3 / 6.4– 8.7 –9.6 µm); OrthotrianeS (Fig. 1E): Straight and Smooth (rhabdome: 138– 196 –333 / 12.5– 20.5 –50 µm; cladome 225– 347 –750 µm); DichotriaeneS (Fig. 1H): rare, Straight and Smooth (cladome 237.5– 323.1 –506.2 µm); AmphiaSterS (Fig. 1I): highly microSpined with 6–9 actineS (width 10.9– 22.7 –31.5 µm); MicroxeaS (Fig. 1F–G): (1) thin, long, entirely microSpined and Slightly curved (114.3– 197.5 –296.2 / 1.61– 4.1 –6.4 µm), (2) Straight, entirely microSpined and centrotylote (32.2– 40.5 –57.9 / 1.6– 2.3 –3.5 µm). Distribution and ecology. Known only from the type locality: Off Bacia Potiguar, Rio Grande do Norte State, Brazil), at 108 m depth. No data regarding the habitat were recorded; the relatively deep diStribution (below 100 m) iS So far unuSual for memberS of the genuS. Etymology. The Specific name honorS the Second author’S daughter Luna Maria Mariz Garcia. Discussion. ThiS new SpecieS iS aSSigned to Characella baSed on the two categorieS of microxeaS and the predominance of amphiaSterS aS microSclereS. Currently, only three SpecieS of genuS are known for the Brazilian coaSt (Table 1). The SpecieS moSt Similar to Characella luna sp. nov. iS C. capitolii, becauSe both have two categorieS of oxeaS and two categorieS of microxeaS, one of them centrotylote. However, C. capitolii differS by not having dichotriaeneS and ......continued on the next page References: (1) Van Soest & Stentoft (1988); (2) Maldonado (2002); (3) Wilson (1925); (4) Mothes et al. (2007); (5) Sollas (1888); (6) Burton (1954); (7) De Laubenfels (1934); (8) Lévi (1993); (9) Lebwohl (1914); (10) Cárdenas & Rapp (2012); (11) Van Soest et al. (2014) for having pleSiaSterS and metaSterS. Like C. capitolii, C. poecillastroides Van SoeSt et al. 2014 ShareS two categorieS of microxeaS, one of them centrotylote. NevertheleSS, C. poecillastroides differS by the abSent of dichotriaeneS and juSt one category of oxea. The following SpecieS differS from the new SpecieS by: PreSence of one category of oxea (C. abbreviata; C. agassizi; C. aspera; C. connectens; C. flexibilis; C. laevis; C. poecillastroides; C. reticulata); AbSence of dichotriaeneS (C. abbreviata; C. agassizi; C. capitolii; C. connectens; C. ijimai; C. laevis; C. poecillastroides; C. reticulata; C. tripodaria); AbSence of orthotriaeneS (C. enae; C. flexibilis); AbSence of the Second category of microxea (C. agassizi; C. enae; C. laevis; C. reticulata); PreSence of metaSterS and abSence of amphiaSterS (C. capitolii; C. enae; C. flexibilis; C. ijimai; C. laevis; C. reticulata); PreSence of pleSiaSterS (C. abbreviata; C. capitolii). In addition, C. laevis, C. ijimai and C. reticulata differ from C. luna sp. nov. by having tyloStyleS; C. pachastrelloides differS by having anatriaeneS.Published as part of Dias, Alan, Santos, George Garcia & Pinheiro, Ulisses, 2019, A new species of Characella Sollas, 1886 (Tetractinellida; Demospongiae; Porifera) from deeper waters off the coast of Brazil, pp. 196-200 in Zootaxa 4559 (1) on pages 196-200, DOI: 10.5281/zenodo.258520
Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil
No full textBartz, Marie L.C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C., Brown, George G. (2023): Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil. Zootaxa 5255 (1): 362-376, DOI: 10.11646/zootaxa.5255.1.29, URL: http://dx.doi.org/10.11646/zootaxa.5255.1.2
Glossoscolex undetermined
No full textGlossoscolex sp. 73 BRSP0227, 9 individuals, surface soil under riparian forest in Itaí—SP (23°33’50.75”S; 49°04’56.88”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 367, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
Ocnerodrilidae
No full textOcnerodrilidae sp.16 BRSP0235, 65 individuals, surface soil under riparian forest in Itaí—SP (23°35’16.22”S; 48°56’27.81”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 369, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
Quantum steering ellipsoids and quantum obesity in critical systems
Get PDFQuantum obesity (QO) is new function used to quantify quantum correlations
beyond entanglement, which also works as a witness for entanglement. Thanks to
its analyticity for arbitrary state of bipartite systems, it represents an
advantage with respect to other quantum correlations, like quantum discord for
example. In this work we show that QO is a fundamental quantity to observe
signature of quantum phase transitions. We also describe a mechanism based on
local filtering operations able to intensify the critical behavior of the QO
near to the transition point. To this end, we introduce a theorem stating how
QO changes under local quantum operations and classical communications. This
work opens perspective for the characterization of new phenomena in quantum
critical systems through the analytically computable pairwise QO.Comment: 8 pages and 3 figures. Comments are welcom
Fimoscolex undetermined
No full textFimoscolex sp. 25 BRSP0228, 3 individuals, surface soil under riparian forest in Itaí—SP (23°33’50.75”S; 49°04’56.88”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls. BRSP0233, 3 individuals, surface soil under riparian forest in Itaí—SP (23°35’16.22”S; 48°56’27.81”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 367, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
Glossoscolecidae
No full textGlossoscolecidae / Rhinodrilidae (juveniles) BRRS0291, 1 individual, surface soil under riparian forest in Sarandi—RS, (27°55’25.71”S 52°47’35.01”W) May 2019. M.L.C. Bartz, R. T. Dudas, J. Tomporowski, W.C. Demetrio colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 368, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
Ocnerodrilidae
No full textOcnerodrilidae sp.15 <p> <b>BRSP0230</b>, 11 individuals, surface soil under riparian forest in Itaí—SP (23°33’50.75”S; 49°04’56.88”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.</p>Published as part of <i>Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1)</i> on page 369, DOI: 10.11646/zootaxa.5255.1.29, <a href="http://zenodo.org/record/7745023">http://zenodo.org/record/7745023</a>
El Tlacuache Núm. 294 (2008). 294 Año 9 (2008) enero. El Tlacuache
No full textConservación de nuestro Patrimonio por Marco Antonio Santo. - Xochicalco Patrimonio Mundial por Marco Antonio Santos Ramírez
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