The Oslo model, hyperuniformity, and the quenched Edwards-Wilkinson model

We present simulations of the 1-dimensional Oslo rice pile model in which the critical height at each site is randomly reset after each toppling. We use the fact that the stationary state of this sandpile model is hyperuniform to reach system of sizes $> 10^7$. Most previous simulations were seriously flawed by important finite size corrections. We find that all critical exponents have values consistent with simple rationals: $\nu=4/3$ for the correlation length exponent, $D =9/4$ for the fractal dimension of avalanche clusters, and $z=10/7$ for the dynamical exponent. In addition we relate the hyperuniformity exponent to the correlation length exponent $\nu$. Finally we discuss the relationship with the quenched Edwards-Wilkinson (qEW) model, where we find in particular that the local roughness exponent is $\alpha_{\rm loc} = 1$.Comment: 20 pages, 26 figure

Generating entanglement between quantum dots with different resonant frequencies based on Dipole Induced Transparency

We describe a method for generating entanglement between two spatially separated dipoles coupled to optical micro-cavities. The protocol works even when the dipoles have different resonant frequencies and radiative lifetimes. This method is particularly important for solid-state emitters, such as quantum dots, which suffer from large inhomogeneous broadening. We show that high fidelities can be obtained over a large dipole detuning range without significant loss of efficiency. We analyze the impact of higher order photon number states and cavity resonance mismatch on the performance of the protocol

Institutional Diversity and Capitalist Transformation in Rural Arunachal Pradesh

This paper contributes a preliminary analysis of the process of capitalist transformation in Arunachal Pradesh, one of the least studied regions of India. Primarily based on information collected through a field survey in eleven villages, the paper seeks to explain the nature and implications of institutional unevenness in the development of capitalism. Institutional diversity is not simply mapped across space; it is also manifested in the simultaneous existence of market and non-market institutions across the means of production within the same village or spatial context. In addition there is a continuous and complex interaction among these institutions which both shapes and is shaped by this incipient capitalist transformation. Against the near universal consensus of social theorists that non-market institutional forms and processes would decline with the expansion and consolidation of the capitalist economy, the evidence presented here suggests that institutional adaptation, continuity and hybridity are as much integral to the emergence of the market economy as are the processes of creation of new institutions and demise of others. There is no necessary correspondence between the emerging commercialisation of the different productive dimensions of the agrarian economy. These uneven processes of institutional diversity, hybridity and interdependence are deeply influenced by existing and emerging power relations. Primitive accumulation, which was thought to be an archaic feature of early capitalism, emerges as a continuing characteristic of the on-going agrarian and non-agrarian capitalist transformation.