Entanglement of formation and concurrence

2001 ◽  
Vol 1 (1) ◽  
pp. 27-44
Author(s):  
William K. Wootters
Keyword(s):  
Current Understanding ◽  
Related Concept ◽  
Explicit Formulas ◽  
Entanglement Of Formation ◽  
Bipartite States

This paper reviews our current understanding of entanglement of formation and the related concept of concurrence, including discussions of additivity, the problem of finding explicit formulas, and connections between concurrence and other propertis of bipartite states.

scholarly journals Non-monogamy of quantum discord and upper bounds for quantum correlation

2013 ◽  
Vol 13 (5&6) ◽  
pp. 469-478
Author(s):  
Xi-Jun Ren ◽  
Heng Fan
Keyword(s):  
Mutual Information ◽  
Quantum Correlation ◽  
Quantum Discord ◽  
Quantum Correlations ◽  
Upper Bounds ◽  
Physical Analysis ◽  
Classical Correlation ◽  
Entanglement Of Formation ◽  
Quantum Mutual Information ◽  
Bipartite States

We consider a monogamy inequality of quantum discord in a pure tripartite state and show that it is equivalent to an inequality between quantum mutual information and entanglement of formation of two parties. Since this inequality does not hold for arbitrary bipartite states, quantum discord can generally be both monogamous and polygamous. We also carry out numerical calculations for some special states. The upper bounds of quantum discord and classical correlation are also discussed and we give physical analysis on the invalidness of a previous conjectured upper bound of quantum correlation. Our results provide new insights for further understanding of distributions of quantum correlations.

Dark and Peculiar

2019 ◽  
Vol 40 (2) ◽  
pp. 92-103 ◽  
Author(s):  
Janko Međedović ◽  
Goran Knežević
Keyword(s):  
Undergraduate Students ◽  
Study Design ◽  
Personal Characteristics ◽  
Emotional Reaction ◽  
Current Understanding ◽  
Male Students ◽  
Psychosis Proneness ◽  
Negative Emotional Reaction ◽  
Mind Set ◽  
Psychopathic Tendencies

Abstract. Earlier research suggested that militant extremists could have certain aspects of psychopathic and psychotic characteristics. Relying on these studies, we investigated whether the Militant Extremist Mind-Set (MEM) could be explained by psychopathy, sadism, and Disintegration (psychosis proneness), as subclinical manifestations of amoral, antisocial, and psychotic-like traits. In Study 1 (306 undergraduate students), it was shown that sadistic and psychopathic tendencies were related to Proviolence (advocating violence as a means for achieving a goal); psychopathic and disintegrative tendencies were associated to the Vile World (belief in a world as a corrupted and vile place), while Disintegration was the best predictor of Divine Power (relying on supernatural forces as a rationale for extremist acts). In Study 2 (147 male convicts), these relations were largely replicated and broadened by including implicit emotional associations to violence in the study design. Thus, while Proviolence was found to be related to a weakened negative emotional reaction to violent pictures, Vile World was found to be associated with stronger negative emotions as a response to violence. Furthermore, Proviolence was the only MEM factor clearly differentiating the sample of convicts from male students who participated in Study 1. Results help extend current understanding about personal characteristics related to militant extremism.

The Role of Women in Pursuing Scottish Criminal Actions, 1580–1650

2020 ◽  
Vol 24 (2) ◽  
pp. 232-250
Author(s):  
Stephanie Dropuljic
Keyword(s):  
Early Modern ◽  
Legal History ◽  
Criminal Court ◽  
Current Understanding ◽  
The Law ◽  
Role Of Women

This article examines the role of women in raising criminal actions of homicide before the central criminal court, in early modern Scotland. In doing so, it highlights the two main forms of standing women held; pursing an action for homicide alone and as part of a wider group of kin and family. The evidence presented therein challenges our current understanding of the role of women in the pursuit of crime and contributes to an under-researched area of Scots criminal legal history, gender and the law.

Dolphin Social Cognition and Joint Attention: Our Current Understanding

2006 ◽  
Vol 32 (4) ◽  
pp. 443-460 ◽  
Author(s):  
Adam A. Pack ◽  
Louis M. Herman
Keyword(s):  
Social Cognition ◽  
Joint Attention ◽  
Current Understanding

A Reflection of the Current Understanding of Political Freedom

2020 ◽  
Vol 23 (3) ◽  
pp. 8-12
Author(s):  
Ulrich Wollner ◽  
Jaroslav Ušiak
Keyword(s):  
Political Freedom ◽  
Current Understanding

Frontiers of Visibility

Transfers ◽  
2013 ◽  
Vol 3 (2) ◽  
pp. 24-46 ◽  
Author(s):  
Franziska Torma
Keyword(s):  
Twentieth Century ◽  
Current Understanding ◽  
Machine Age ◽  
History Of ◽  
Three Stages ◽  
The 1950S ◽  
The 1960S ◽  
Popular Images ◽  
Cinematic Technology

This article deals with the history of underwater film and the role that increased mobility plays in the exploration of nature. Drawing on research on the exploration of the ocean, it analyzes the production of popular images of the sea. The entry of humans into the depths of the oceans in the twentieth century did not revitalize myths of mermaids but rather retold oceanic myths in a modern fashion. Three stages stand out in this evolution of diving mobility. In the 1920s and 1930s, scenes of divers walking under water were the dominant motif. From the 1940s to the 1960s, use of autonomous diving equipment led to a modern incarnation of the “mermen“ myth. From the 1950s to the 1970s, cinematic technology was able to create visions of entire oceanic ecosystems. Underwater films contributed to the period of machine-age exploration in a very particular way: they made virtual voyages of the ocean possible and thus helped to shape the current understanding of the oceans as part of Planet Earth.

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