1,134 research outputs found
Davies maps for qubits and qutrits
We investigate the dynamics of an N -level quantum system weakly coupled to a
thermal reservoir. For any fixed temperature of the bath there exists a natural
reference state: the equilibrium state of the system. Among all quantum
operations on the system one distinguishes Davies maps, they pre- serve the
equilibrium state, satisfy the detailed balance condition and belong to a
semi-group. A complete characterization of the three dimensional set of qubit
Davies maps is given. We analyze these maps and find their mini- mum output
entropy. A characterization of Davies maps for qutrits is also provided.Comment: 22 pages, 4 figure
Universal bounds for the Holevo quantity, coherent information \\ and the Jensen-Shannon divergence
The Holevo quantity provides an upper bound for the mutual information
between the sender of a classical message encoded in quantum carriers and the
receiver. Applying the strong sub-additivity of entropy we prove that the
Holevo quantity associated with an initial state and a given quantum operation
represented in its Kraus form is not larger than the exchange entropy. This
implies upper bounds for the coherent information and for the quantum
Jensen--Shannon divergence. Restricting our attention to classical information
we bound the transmission distance between any two probability distributions by
the entropic distance, which is a concave function of the Hellinger distance.Comment: 5 pages, 2 figure
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Breed and gender interact to affect the sale price of beef calves sold through video auctions from 2010 through 2014
Citation: McCabe, E. D., King, M. E., Fike, K. E., Hill, K. L., Rogers, G. M., & Odde, K. G. (2016). Breed and gender interact to affect the sale price of beef calves sold through video auctions from 2010 through 2014. Journal of Animal Science, 94, 29-29. doi:10.2527/msasas2016-063The objective of this study was to quantify the effect of the potential interaction of breed and gender on the sale price of beef calves marketed through video auctions while adjusting for all other factors that significantly influenced price. Information on descriptive characteristics of lots of beef calves were obtained from a livestock video auction service. Data were available on 20,007 lots of steer calves and 13,804 lots of heifer calves (2106,181 total steer calves and 1239,645 total heifer calves) that sold in 116 video auctions from 2010 through 2014. All lot characteristics that could be accurately quantified or categorized were used to develop a multiple regression model that evaluated the effects of independent factors on the sale price using a backward selection procedure. A value of P < 0.05 was used to maintain a factor in the final model. Breed description of the calves in the lots was 1 of 19 factors included in the original model and was characterized into 6 groups: English, English crosses (EX), English–Continental crosses (ECX), Black Angus sired out of dams with no Brahman influence (AN), Red Angus sired out of dams with no Brahman influence (AR), and Brahman influenced (BR). Breed and gender of the lot interacted (P < 0.0001) to affect the sale price of calves. Lots of AR and AN steer calves had similar sale prices (P = 0.9540; 378.14 per 100 kg BW, respectively) and sold for significantly higher prices than all other steer breed groups. English cross and ECX steer lots had similar sale prices (P = 0.2588; 374.92 per 100 kg BW, respectively) but were greater (P < 0.05) than BR steer calves (356.02 per 100 kg BW). The AN heifer calves sold for the second highest price at 341.50 per 100 kg BW) and EX heifers (334.64 per 100 kg BW compared with heifers of all other breed descriptions. Breed and gender composition of the lots of beef calves interacted to affect the sale price of calves selling through video auctions. The value of the specific breed composition of beef calves is influenced by gender and may be related to buyers purchasing certain breeds of heifer calves as replacements for the breeding herd
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9-(2,6-DimethylÂphenÂoxyÂcarbonÂyl)-10-methylÂacridinium trifluoroÂmethaneÂsulfonate
In the crystal structure of the title compound, C23H20NO2
+·CF3SO3
−, adjacent cations are linked through a network of C—H⋯π and π–π interÂactions, and neighboring cations and anions via C—H⋯O interÂactions. The acridine and benzene ring systems are oriented at a dihedral angle of 31.4 (1)°. The carboxyl group is twisted at an angle of 66.3 (1)° relative to the acridine skeleton. The mean planes of the adjacent acridine moieties are parallel in the crystal structure
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