Does von Neumann Entropy Correspond to Thermodynamic Entropy?

Conventional wisdom holds that the von Neumann entropy corresponds to thermodynamic entropy, but Hemmo and Shenker (2006) have recently argued against this view by attacking von Neumann's (1955) argument. I argue that Hemmo and Shenker's arguments fail due to several misunderstandings: about statistical-mechanical and thermodynamic domains of applicability, about the nature of mixed states, and about the role of approximations in physics. As a result, their arguments fail in all cases: in the single-particle case, the finite particles case, and the infinite particles case

Does von Neumann Entropy Correspond to Thermodynamic Entropy?

Conventional wisdom holds that the von Neumann entropy corresponds to thermodynamic entropy, but Hemmo and Shenker (2006) have recently argued against this view by attacking von Neumann (1955) and his argument. I argue that Hemmo and Shenker's arguments fail due to several misunderstandings: about statistical-mechanical and thermodynamic domains of applicability, about the nature of mixed states, and about the role of approximations in physics. As a result, their arguments fail in all cases: in the single-particle case, the finite particles case, and the infinite particles case

Does Von Neumann's Entropy Correspond to Thermodynamic Entropy?

Conventional wisdom holds that the von Neumann entropy corresponds to thermodynamic entropy, but Hemmo and Shenker (2006) have recently argued against this view by attacking von Neumann's (1955) argument. I argue that Hemmo and Shenker's arguments fail due to several misunderstandings: about statistical mechanical and thermodynamic domains of applicability, about the nature of mixed states, and about the role of approximations in physics. As a result, their arguments fail in all cases: in the single-particle case, the finite particles case, and the infinite particles case

T Falls Apart: On the Status of Classical Temperature in Relativity

Taking the formal analogies between black holes and classical thermodynamics seriously seems to first require that classical thermodynamics applies to relativistic regimes. Yet, by scrutinizing how classical temperature is extended into special relativity, I argue that it falls apart. I examine four consilient procedures for establishing classical temperature - the Carnot process, the thermometer, kinetic theory, and black-body radiation. I show how their relativistic counterparts demonstrate no such consilience in defining relativistic temperature. Hence, classical temperature does not appear to survive a relativistic extension. I suggest two interpretations for this situation - eliminativism akin to simultaneity, or pluralism akin to rotation.Comment: Presented at the Philosophy of Science Association 2022 meeting. Forthcoming at Philosophy of Scienc

The Performance Of Thailand’s Manufacturing Export Competitiveness With Six Selected East Asian Countries Using Shift-share Analysis

It goes without saying that exports competitiveness and trade growth are direct contributions to sustainable economic growth. The move of export competitiveness becomes international when it pertains to two or more countries accordingly. As such, manufacturing exports in the East Asian countries have been exploited the comparative advantage and the opportunities for economic development through trade. Thailand, as a market challenger, has been facing strong competition from the powerful global competitors who can steer through the turbulent trade environment. This study attempts to investigate the performance of Thailand’s manufacturing export competitiveness in the EU market as compared to the six selected East Asian countries’ performance (i.e. Korea, China, Indonesia, Malaysia, the Philippines and Singapore,) by using shift-share analysis. The main findings reveal that Thailand’s precious stone and jewelry exports had high competitiveness in the EU market, followed by the rubber products, machinery and equipment and road vehicle. However, Thailand did not perform well in the organic chemical, iron and steel, artificial and plastic material, office machines and automatic data processing and electrical machinery. In order to remain competitive in the world economy, the government continues to place emphasis on research and development and to increase the nation capability between the foreign buyers and the Thai jewelers. This effort has certainly propelled the precious stone and jewelry industry from Thailand into the forefront of global competitiveness

Effective fair pricing of international mutual funds

We propose a new methodology to provide fair prices of international mutual funds by adjusting prices at the individual security level using a comprehensive and economically relevant information set. Stepwise regressions are used to endogenously determine the stock-specific optimal set of factors. Using 16 synthetic funds whose characteristics are extracted from 16 corresponding actual US-based Japanese mutual funds, we demonstrate that our method estimates fund prices significantly more accurately than existing methods. Although existing fair-pricing methods provide an improvement over the current practice of simply using Japanese market closing prices, they are still highly vulnerable to exploitation by market-timers. By contrast, our method is the most successful in preventing such strategic exploitation since no competing method can profit from our stated prices. © 2008 Elsevier B.V. All rights reserved.preprin

Effects of Trade Openness, Investment and Population on the Economic Growth: A Case Study of Syria

This study attempts to investigate the role of trade openness, investment and population in the Syrian economy over the period 1980-2010. The cointegration test indicates that GDP is positively and significantly related to the trade openness, investment and population. The Granger causality test indicates bidirectional short-run causality relationships between trade openness, investment, population and GDP. There are also bidirectional long-run causality relationships between investment, population and GDP, and unidirectional long-run causality relationship running from trade openness to GDP. The study result indicates that population has the biggest effect on the GDP, thus we suggest improving the quality of the human capital in the country, as well as improving the investment and opening up the Syrian economy to foreign trade

No Time for Time from No-Time

Programs in quantum gravity often claim that time emerges from fundamentally timeless physics. In the semiclassical time program time arises only after approximations are taken. Here we ask what justifies taking these approximations and show that time seems to sneak in when answering this question. This raises the worry that the approach is either unjustified or circular in deriving time from no-time.Comment: Presented at Philosophy of Science Association 2021 meetin

Across the great divides: Gender dynamics influence how intercultural conflict helps or hurts creative collaboration

Ministry of Education, Singapore, Social Science Research Thematic Gran