Analytical calculation of the excess current in the OTBK theory (2009)
Niebler, Gabriel, Cuniberti, Gianaurelio, Novotny, Tomas
We present an analytical derivation of the excess current in Josephson junctions within the Octavio-Tinkham-Blonder-Klapwijk theory for both symmetric and asymmetric barrier strengths. We confirm the...
Phonon-assisted current noise in molecular junctions (2009)
Haupt, Federica, Novotny, Tomas, Belzig, Wolfgang
We investigate the effects of phonon scattering on the electronic current noise through nanojunctions using the non-equilibrium Green's functions formalism extended to include the counting field. In...
We report an observation of charge conservation breaking in a model study of electronic current noise of transport through a dissipative double quantum dot within generalized master equation...
Bubble merging in breathing DNA as a vicious walkers problem in opposite potentials (2009)
Pedersen, Jonas Nyvold, Hansen, Mikael Sonne, Novotny, Tomas, Ambjornsson, Tobias, Metzler, Ralf
We investigate the coalescence of two DNA-bubbles initially located at weak domains and separated by a more stable barrier region in a designed construct of double-stranded DNA. In a continuum...
Universal oscillations in counting statistics (2009)
Flindt, Christian, Fricke, Christian, Hohls, Frank, Novotny, Tomas, Netocny, Karel, Brandes, Tobias, ...
Noise is a result of stochastic processes that originate from quantum or classical sources. Higher-order cumulants of the probability distribution underlying the stochastic events are believed to...
Pedersen, Jonas Nyvold, Bohr, Dan, Wacker, Andreas, Novotny, Tomas, Schmitteckert, Peter, Flensberg, Karsten
We study the competition between interference due to multiple single-particle paths and Coulomb interaction in a simple model of an Anderson-like impurity with local-magnetic-field-induced level...
The influence of charge detection on counting statistics (2008)
Braggio, Alessandro, Flindt, Christian, Novotny, Tomas
We consider the counting statistics of electron transport through a double quantum dot with special emphasis on the dephasing induced by a nearby charge detector. The double dot is embedded in a...
Josephson Junctions as Threshold Detectors of the Full Counting Statistics: Open issues (2008)
I study the dynamics of a Josephson junction serving as a threshold detector of fluctuations which is subjected to a general non-equilibrium electronic noise source whose characteristics is to be...
Non-Markovian signatures in the current noise of a charge qubit (2008)
Braggio, Alessandro, Flindt, Christian, Novotny, Tomas
We investigate the current noise of a charge qubit coupled to a phonon bath in different parameter regimes. We find, using the theory of Full Counting Statistics of non-Markovian systems, that the...
Counting Statistics of Non-Markovian Quantum Stochastic Processes (2008)
Flindt, Christian, Novotny, Tomas, Braggio, Alessandro, Sassetti, Maura, Jauho, Antti-Pekka
We derive a general expression for the cumulant generating function (CGF) of non-Markovian quantum stochastic transport processes. The long-time limit of the CGF is determined by a single dominating...
Non-Markovian dynamics in the theory of full counting statistics (2007)
Flindt, Christian, Braggio, Alessandro, Novotny, Tomas
We consider the theoretical description of real-time counting of electrons tunneling through a Coulomb-blockade quantum dot using a detector with finite bandwidth. By tracing out the quantum dot we...
Bubble coalescence in breathing DNA: Two vicious walkers in opposite potentials (2006)
Novotny, Tomas, Pedersen, Jonas Nyvold, Ambjornsson, Tobias, Hansen, Mikael Sonne, Metzler, Ralf
We investigate the coalescence of two DNA-bubbles initially located at weak segments and separated by a more stable barrier region in a designed construct of double-stranded DNA. The characteristic...
Josephson current through a molecular transistor in a dissipative environment (2005)
Novotny, Tomas, Rossini, Alessandra, Flensberg, Karsten
We study the Josephson coupling between two superconductors through a single correlated molecular level, including Coulomb interaction on the level and coupling to a bosonic environment. All...
Noise and Bistabilities in Quantum Shuttles (2005)
Flindt, Christian, Novotny, Tomas, Jauho, Antti-Pekka
We present a study of current fluctuations in two models proposed as quantum shuttles. Based on a numerical evaluation of the first three cumulants of the full counting statistics we have recently...
Current noise spectrum of a quantum shuttle (2004)
Flindt, Christian, Novotny, Tomas, Jauho, Antti-Pekka
We present a method for calculating the full current noise spectrum for the class of nano-electromechanical systems (NEMS) that can be described by a Markovian generalized master equation. As a...
Current and current fluctuations in quantum shuttles (2004)
Jauho, A. P., Flindt, C., Novotny, Tomas, Donarini, Andrea
We review the properties of electron shuttles, i.e. nanoelectromechanical devices that transport electrons one-by-one by utilizing a combination of electronic and mechanical degrees of freedom. We...
Modeling of quantum electromechanical systems (2004)
Jauho, Antti-Pekka, Novotny, Tomas, Donarini, Andrea, Flindt, Christian
We discuss methods for numerically solving the generalized Master equation GME which governs the time-evolution of the reduced density matrix of a mechanically movable mesoscopic device in a...
Full counting statistics of nano-electromechanical systems (2004)
Flindt, Christian, Novotny, Tomas, Jauho, Antti-Pekka
We develop a theory for the full counting statistics (FCS) for a class of nanoelectromechanical systems (NEMS), describable by a Markovian generalized master equation. The theory is applied to two...
Current noise in a vibrating quantum dot array (2004)
Flindt, Christian, Novotny, Tomas, Jauho, Antti-Pekka
We develop methods for calculating the zero-frequency noise for quantum shuttles, i.e. nanoelectromechanical devices where the mechanical motion is quantized. As a model system we consider a...
Shot Noise of a Quantum Shuttle (2004)
Novotny, Tomas, Donarini, Andrea, Flindt, Christian, Jauho, Antti-Pekka
We formulate a theory for shot noise in quantum nanoelectromechanical systems. As a specific example, the theory is applied to a quantum shuttle, and the zero-frequency noise, measured by the Fano...
Quantum theory of shuttling instability in a movable quantum dot array (2004)
Donarini, Andrea, Novotny, Tomas, Jauho, Antti-Pekka
We study the shuttling instability in an array of three quantum dots the central one of which is movable. We extend the results by Armour and MacKinnon on this problem to a broader parameter regime....
Quantum Shuttle in Phase Space (2003)
Novotny, Tomas, Donarini, Andrea, Jauho, Antti-Pekka
We present a quantum theory of the shuttle instability in electronic transport through a nanostructure with a mechanical degree of freedom. A phase space formulation in terms of the Wigner function...
On apparent breaking the second law of thermodynamics in quantum transport studies (2002)
We consider a model for stationary electronic transport through a one-dimensional chain of two leads attached to a perturbed central region (quantum dot) in the regime where the theory proposed...
Resonant Activation Phenomenon for Non-Markovian Potential-Fluctuation Processes (2000)
We consider a generalization of the model by Doering and Gadoua to non-Markovian potential-switching generated by arbitrary renewal processes. For the Markovian switching process, we extend the...