It From Bit and The Unsmooth Reality

In this short essay it is argued that the "It from Bit" idea is plausible when assuming "generalized bits", resulting from the Kolmogorov superposition theorem, as universal building blocks.Comment: 4 pages, submitted to FQXi 2013 Essay Contest - "It from Bit or Bit from It

Comment on "Dynamic Scaling of Non-Euclidean Interfaces" [arXiv:0804.1898]

This is the revised version of a Comment on a paper by C. Escudero (Phys. Rev. Lett. 100, 116101, 2008; arXiv:0804.1898)

Worry, procrastination, and perfectionism: Differentiating amount of worry, pathological worry, anxiety, and depression

This study investigates features that differentiate worry from somatic anxiety and depression. Theoretical models of the worry process suggest that worry is closely related to procrastination. In addition, research on worry and elevated evidence requirements proposes a relationship between worry and perfectionism. Perfectionism, however, is multidimensional in nature. Moreover, previous research has linked procrastination and perfectionism mainly to anxiety and depression. Therefore, the relationship among worry, procrastination, and dimensions of perfectionism was investigated irt a sample of 180 students, controlling for anxiety and depression. Results show that worry had substantial correlations with procrastination and perfectionism, particularly with perfectionist concern over mistakes and doubts. Moreover, worry was related to parental criticism and expectations, but unrelated to excessively high personal standards. instead high-worriers reported to lower standards under stress. Partial correlations indicated that these correlations were specific for amount of worry, thus differentiating amount of worry, pathological worry, anxiety, and depression

Measuring perfectionism in sport, dance, and exercise: Review, critique, recommendations

Over the past 25 years, a number of multidimensional measures of perfectionism has been developed. Based on different models of multidimensional perfectionism, these measures contain different numbers of subscales, and most of the time the different subscales bear different names. This presents a confusing situation to researchers unfamiliar with the often complex details of the perfectionism literature who want to conduct research on perfectionism in sport, dance, and exercise and need to make a decision as to what measure to use to capture individual differences in multidimensional perfectionism. The aim of the present chapter is to give researchers some guidance in this decision. To this aim, the chapter will (a) review the available multidimensional measures that have been published in international peer-reviewed journals and (b) provide a critique of these measures. In addition, the chapter will provide (c) recommendations on which measures to use and guidance on which decisions researchers have to make when using these measures to capture perfectionism in sport, dance, and exercise

Dynamic phase transitions in electromigration-induced step bunching

Electromigration-induced step bunching in the presence of sublimation or deposition is studied theoretically in the attachment-limited regime. We predict a phase transition as a function of the relative strength of kinetic asymmetry and step drift. For weak asymmetry the number of steps between bunches grows logarithmically with bunch size, whereas for strong asymmetry at most a single step crosses between two bunches. In the latter phase the emission and absorption of steps is a collective process which sets in only above a critical bunch size and/or step interaction strength.Comment: 4 pages, 4 figure

Low temperature electron transfer in strongly condensed phase

Electron transfer coupled to a collective vibronic degree of freedom is studied in strongly condensed phase and at lower temperatures where quantum fluctuations are essential. Based on an exact representation of the reduced density matrix of the electronic+reaction coordinate compound in terms of path integrals, recent findings on the overdamped limit in quantum dissipative systems are employed. This allows to give for the first time a consistent generalization of the well-known Zusman equations to the quantum domain. Detailed conditions for the range of validity are specified. Using the Wigner transform these results are also extended to the quantum dynamics in full phase space. As an important application electronic transfer rates are derived that comprise adiabatic and nonadiabatic processes in the low temperature regime including nuclear tunneling. Accurate agreement with precise quantum Monte Carlo data is observed.Comment: 16 pages, 6 figures, revised version with minor change