M. Merkli

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We consider quantum systems consisting of a " small " system coupled to two reservoirs (called open systems). We show that such a system has no equilibrium states normal with respect to any state of the decoupled system in which the reservoirs are at different temperatures, provided that either the temperatures or the temperature difference divided by the(More)
  • J Fröhlich, M Merkli, S Schwarz, D Ueltschi
  • 2003
This note is dedicated to H. Ezawa on the occasion of his 70 th birthday, with respect and affection. 1 Time-dependent thermodynamic processes In this note we describe some results concerning non-relativistic quantum systems at positive temperature and density confined to macroscopically large regions, Λ, of physical space R 3 which are under the influence(More)
We study the stationary states of a quantum mechanical system describing an atom coupled to black-body radiation at positive temperature. The stationary states of the non-interacting system are given by product states, where the particle is in a bound state corresponding to an eigenvalue of the particle Hamiltonian, and the field is in its equilibrium(More)
We study a small quantum system (e.g. a simplified model for an atom or molecule) interacting with two bosonic or fermionic reservoirs (say, photon or phonon fields) at different temperatures T1 and T2. We show that if T1 is not equal to T2 then the combined system has a stationary, non-equilibrium state (NESS). We show that this state has nonvanishing heat(More)
We give a complete and rigorous proof of the Unruh effect, in the following form. We show that the state of a two-level system, uniformly accelerated with proper acceleration a, and coupled to a scalar bose field initially in the Minkowski vacuum state will converge, asymptotically in the detector's proper time, to the Gibbs state at inverse temperature β =(More)
We investigate the role of long-lasting quantum coherence in the efficiency of energy transport at room temperature in Fenna-Matthews-Olson photosynthetic complexes. The excitation energy transfer due to the coupling of the light harvesting complex to the reaction center (" sink ") is analyzed using an effective non-Hermitian Hamiltonian. We show that, as(More)
  • J Theor Probab, Andrew Ledoan, Marco Merkli, Shannon Starr, A Ledoan, S Starr +1 other
  • 2010
We consider random analytic functions defined on the unit disk of the complex plane f (z) = ∞ n=0 a n X n z n , where the X n 's are i.i.d., complex-valued random variables with mean zero and unit variance. The coefficients a n are chosen so that f (z) is defined on a domain of C carrying a planar or hyperbolic geometry, and Ef (z)f (w) is covariant with(More)