Measurability of D-concurrence

AbstractAn effective approach to quantify entanglement of any bipartite systems is D-concurrence, which is important in quantum information science. In this paper, we present a direct method for experimental determination of the D-concurrence of an arbitrary bipartite pure state. To do this, we show that measurement of the D-concurrence of bipartite pure state can be conversed into the measurement performed on some observables so called generalized Gell-Mann operators. We first introduce the concept of D-concurrence for a bipartite system. Then we explain the method of measuring this entanglement measure for the pure state. Finally, for clarify of the subject, we give an example consisting of two parties A and B with dimensions 3.

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Experimental Determination of the Isostatic Lines

Journal of Applied Mechanics ◽

10.1115/1.4009224 ◽

1942 ◽

Vol 9 (4) ◽

pp. A155-A160 ◽

Cited By ~ 1

Author(s):

Augusto J. Durelli

Keyword(s):

Experimental Determination ◽

Tensile Strain ◽

Direct Method ◽

The Body ◽

Principal Stresses ◽

Maximum Tensile Strain ◽

Geometrical Form ◽

Yield Values ◽

A Direct Method

Abstract In this paper a direct method for obtaining the isostatics or stress trajectories is described. These lines indicate the directions of the principal stresses. The procedure used by the author can be applied almost without regard to the geometrical form of the object under stress. It also possesses the advantage in that the test is nondestructive and that in most cases it will yield values of the stress magnitudes within 10 or 15 per cent of the correct values. The technique consists in covering the surface of the body with a thin coat of lacquer which becomes brittle upon hardening. If the object being tested is painted under zero load and then stressed after the coating has hardened, the layer of lacquer will crack along lines perpendicular to the maximum tensile strain. The companion set of trajectories at right angles can usually be formed through relaxation. As an aid in photoelasticity this procedure has great possibilities as it eliminates the necessity for determining the isoclinic lines which are difficult to obtain.

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The structure of haemoglobin

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1952.0136 ◽

1952 ◽

Vol 213 (1115) ◽

pp. 425-435 ◽

Cited By ~ 64

Keyword(s):

Direct Method ◽

Direct Determination ◽

Subsequent Paper ◽

X Ray ◽

The Subject ◽

Absolute Measurements ◽

Crystalline Forms ◽

A Direct Method ◽

Haemoglobin Molecule

The paper describes the first steps in an attempt to solve the structure of a haemoglobin molecule by X-ray analysis, using a direct method. It is based on an extensive series of absolute measurements of the diffraction by various shrinkage stages of a haemoglobin crystal, and estimates based on many crystalline forms of the general dimensions of the haemoglobin molecule. The methods used are described here and applied to a direct determination of the electron density in one particular direction in the molecule. The extension of the methods to the subsequent problem of obtaining a picture of the molecule as projected on a plane will, it is hoped, form the subject of a subsequent paper.

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Experimental determination of the second viscosity

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1954.0235 ◽

1954 ◽

Vol 226 (1164) ◽

pp. 56-57 ◽

Cited By ~ 1

Keyword(s):

Experimental Determination ◽

Experimental Verification ◽

Direct Method ◽

Point Of View ◽

Excess Adsorption ◽

The Subject ◽

Coefficient Of Viscosity ◽

Theoretical Considerations ◽

Excess Absorption

Previous speakers have mentioned that the subject of the second coefficient of viscosity was first clearly and fully dealt with by Tisza in 1942. He put forward the point of view, from theoretical considerations, that the excess absorption of highfrequency sound energy in different media could be accounted for by considering the factor of the second viscosity. His theoretical deductions, however, were not in a form which could be checked experimentally. In 1947 Gurevich again pointed out this fact and showed that excess adsorption of sound in water could be satisfactorily explained but again without experimental verification. Any direct method for the experimental determination of this coefficient is still not known.

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