Physics of Black Holes
A Guided Tour
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Giant enhancement of hydrodynamically enforced entropic trap** in thin channels
Using our generalized Fick-Jacobs approach [1, 2] and extensive Brownian dynamics simulations, we study particle transport through three-dimensional periodic channels of different height. Directed motion is ca...
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Active Brownian motion in a narrow channel
We review recent advances in rectification control of artificial microswimmers, also known as Janus particles, diffusing along narrow, periodically corrugated channels. The swimmer self-propulsion mechanism is...
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How entropy and hydrodynamics cooperate in rectifying particle transport
Using the analytical Fick-Jacobs approximation formalism and extensive Brownian dynamics simulations we study particle transport through two-dimensional periodic channels with triangularly shaped walls. Direct...
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Relativistic Brownian motion on a graphene chip
Relativistic Brownian motion can be inexpensively demonstrated on a graphene chip. The interplay of stochastic and relativistic dynamics, governing the transport of charge carrier in graphene, induces noise-co...
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Geometric phase as a determinant of a qubit– environment coupling
We investigate the qubit geometric phase and its properties in dependence on the mechanism for decoherence of a qubit weakly coupled to its environment. We consider two sources of decoherence: dephasing coupli...
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Electron transport across a quantum wire in the presence of electron leakage to a substrate
We investigate electron transport through a mono-atomic wire which is tunnel coupled to two electrodes and also to the underlying substrate. The setup is modeled by a tight-binding Hamiltonian and can be real...
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Noisy saltatory spike propagation: The breakdown of signal transmission due to channel noise
Noisy saltatory spike propagation along myelinated axons is studied within a stochastic Hodgkin-Huxley model. The intrinsic noise (whose strength is inversely proportional to the nodal membrane size) arising ...
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Depinning of 2d and 3d Droplets Blocked by a Hydrophobic Defect
On non-ideal real substrates the onset of droplet motion under lateral driving is strongly influenced by substrate defects. A finite driving force is necessary to overcome the pinning influence of microscale h...
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Creation and manipulation of entanglement in spin chains far from equilibrium
We investigate creation, manipulation, and steering of entanglement in spin chains from the viewpoint of quantum communication between distant parties. We demonstrate how global parametric driving of the spin...
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Stochastic Resonance: A remarkable idea that changed our perception of noise
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Entropic stochastic resonance: the constructive role of the unevenness
We demonstrate the existence of stochastic resonance (SR) in confined systems arising from entropy variations associated to the presence of irregular boundaries. When the motion of a Brownian particle is const...
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Nonstationary stochastic resonance viewed through the lens of information theory
In biological systems, information is frequently transferred with Poisson like spike processes (shot noise) modulated in time by information-carrying signals. How then to quantify information transfer by such ...
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Fast initial qubit dephasing and the influence of substrate dimensions on error correction rates
Kee** single-qubit quantum coherence above some threshold value not far below unity is a prerequisite for fault-tolerant quantum error correction (QEC). We study the initial dephasing of solid-state qubits i...
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Open AccessGeneralized Fokker-Planck equation: Derivation and exact solutions
We derive the generalized Fokker-Planck equation associated with the Langevin equation (in the Ito sense) for an overdamped particle in an external potential driven by multiplicative noise with an arbitrary di...
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Slowly rocking symmetric, spatially periodic Hamiltonians: The role of escape and the emergence of giant transient directed transport
The nonintegrable Hamiltonian dynamics of particles placed in a symmetric, spatially periodic potential and subjected to a periodically varying field is explored. Such systems can exhibit a rich diversity of unus...
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