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On the role of entanglement in Schrödinger’s cat paradox

100%
Rinner S., Werner E.
Open Physics
|
2008
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vol. 6
|
issue 1
178-183
EN
In this paper we re-investigate the core of Schrödinger’s “cat paradox”. We argue that one has to distinguish clearly between superpositions of macroscopic cat states |☺〉 + |☹〉 and superpositions of entangled states |☺, ↑〉 + |☹, ↓〉 which comprise both the state of the cat (☺=alive, ☹=dead) and the radioactive substance (↑=not decayed, ↓=decayed). It is shown, that in the case of the cat experiment recourse to decoherence or other mechanisms is not necessary in order to explain the absence of macroscopic superpositions. Additionally, we present modified versions of two quantum optical experiments as experimenta crucis. Applied rigorously, quantum mechanical formalism reduces the problem to a mere pseudo-paradox.
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Dlaczego w biologii tak trudno być „rewolucjonistą”?

80%
Proszewska A., Stencel A.
Zeszyty Naukowe Towarzystwa Doktorantów Uniwersytetu Jagiellońskiego. Nauki Ścisłe
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2017
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issue 15
7-14
EN
Understanding how science is created and developed is a very complex problem. Many claim that once in a while the science goes through periods of so-called “revo-lutions” – diametric changes in the perception of the reality, that change the way we see the world. Such a vision of the development of knowledge is particularly evident in the history of physics. Do similar breakthroughs take place in other sciences, such as biology or chemistry, as well? Our main objective is to demonstrate that the scien-tific revolutions in biology can have a specific, local, character and concern only some particular branches of biology. This hypothesis will be discussed by analyzing the impact of microbiomics on the concept of the organism.
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