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- Emil Lundh, Mats Wallin
- Physical review letters
- 2005

The possibility of realizing a directed current for a quantum particle in a flashing asymmetric potential is investigated. It is found that quantum resonances, where the value of the effective Planck constant is equal to an integer or half-integer multiple of pi, give rise to a directed current. The effect should be readily observable in experiments.

- Mats K E B Wallin, Samson Wajntraub
- Anesthesia and analgesia
- 2004

UNLABELLED
In today's intensive care and surgery, a great number of cables are attached to patients. These cables can make the care and nursing of the patient difficult. Replacing them with wireless communications technology would facilitate patient care. Bluetooth is a modern radio technology developed specifically to replace cables between different… (More)

- Martin Lindén, Mats Wallin
- Biophysical journal
- 2007

The statistics of steps and dwell times in reversible molecular motors differ from those of cycle completion in enzyme kinetics. The reason is that a step is only one of several transitions in the mechanochemical cycle. As a result, theoretical results for cycle completion in enzyme kinetics do not apply to stepping data. To allow correct parameter… (More)

- Mats KEB Wallin, Eva Selldén, Staffan Eksborg, Kerstin Brismar
- Nutrition & metabolism
- 2007

BACKGROUND
Surgery, commonly performed after an overnight fast, causes a postoperative decline in the anabolic and glucose lowering insulin-like growth factor-1 (IGF-1). Clinical fasting studies have exhibited a positive correlation between IGF-1 and nitrogen balance during different conditions. A perioperative amino acid infusion changes nitrogen balance… (More)

- Martin Lindén, Tomi Tuohimaa, Ann-Beth Jonsson, Mats Wallin
- Physical review. E, Statistical, nonlinear, and…
- 2006

The motility of certain gram-negative bacteria is mediated by retraction of type IV pili surface filaments, which are essential for infectivity. The retraction is powered by a strong molecular motor protein, PilT, producing very high forces that can exceed 150 pN. The molecular details of the motor mechanism are still largely unknown, while other features… (More)

We have studied the nonlinear current-voltage characteristic of a two dimensional lattice Coulomb gas by Monte Carlo simulation. We present three different determinations of the power-law exponent a(T) of the nonlinear current-voltage characteristic, V ∼ I a(T)+1. The determinations rely on both equilibrium and non-equilibrium simulations. We find good… (More)

We have performed Monte Carlo simulations to determine current{voltage characteristics of two vortex glass models in two dimensions. Our results connrm earlier studies which concluded that there is a zero temperature transition. Additionally we nd that, as the temperature approaches zero, the linear resistance vanishes exponentially, and the current scale,… (More)

The type IV pilus retraction motor is found in many important bacterial pathogens. It is the strongest known linear motor protein and is required for bacterial in-fectivity. We characterize the dynamics of type IV pilus retraction in terms of a stochastic chemical reaction model. We find that a two state model can describe the experimental force velocity… (More)

- Marios Nikolaou, Mats Wallin, Hans Weber
- Physical review letters
- 2006

We study the superfluid transition of 4He in aerogel by Monte Carlo simulations and finite size scaling analysis. Aerogel is a highly porous silica glass, which we model by a diffusion limited cluster aggregation model. The superfluid is modeled by a three dimensional XY model, with excluded bonds to sites on the aerogel cluster. We obtain the correlation… (More)

- Anders Vestergren, Jack Lidmar, Mats Wallin
- Physical review letters
- 2005

We consider a depinning transition in vortex systems with columnar disorder and tilted applied magnetic fields. From scaling arguments and Monte Carlo simulations, we find that this transverse Meissner transition is governed by a fixed point which is anisotropic in all three directions. This generalization of conventional anisotropic scaling means that the… (More)