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- Meir Lewkowicz, Baruch Rosenstein
- Physical review letters
- 2009

The process of coherent creation of particle-hole excitations by an electric field in graphene is quantitatively described. We calculate the evolution of the current density, number of pairs, andâ€¦ (More)

- Lawrence Paul Horwitz, Yossi Ben Zion, Meir Lewkowicz, Marcelo Schiffer, Jacob Levitan
- Physical review letters
- 2007

The characterization of chaotic Hamiltonian systems in terms of the curvature associated with a Riemannian metric tensor in the structure of the Hamiltonian is extended to a wide class of potentialâ€¦ (More)

- Yoram Epstein, D. S. Moran, Yuval Heled, Roi Kobo, Meir Lewkowicz, Jacob Levitan
- Journal of basic and clinical physiology andâ€¦
- 2010

The Multipole Method is a recently developed method to describe time series with highly complex time evolution, such as cardiac rhythm. We hypothesized that applying this method in the analysis ofâ€¦ (More)

Y. Ashkenazy, M. Lewkowicz, J. Levitan, H. Moelgaard, P.E. Bloch Thomsen and K. Saermark (a) Dept. of Physics, Bar-Ilan University, Ramat-Gan, Israel (b) Gonda Goldschmied Center, Bar-Ilanâ€¦ (More)

- Yosef Ashkenazy, Meir Lewkowicz, +7 authors Heikki Huikuri
- 1999

Y. Ashkenazy, M. Lewkowicz, J. Levitan, S. Havlin, K. Saermark, H. Moelgaard, P.E. Bloch Thomsen, M. Moller, U. Hintze, and H. Huikuri (a) Dept. of Physics, Bar-Ilan University, Ramat-Gan, Israel (b)â€¦ (More)

- Rikke MÃ¸rch Olesen, Poul Erik Bloch Thomsen, +4 authors Jacob Levitan
- Physiological measurement
- 2005

We present a new method to describe the dynamics of the beat-to-beat RR time series. The classification of the phase-space plots obtained from RR time series is performed by a calculation ofâ€¦ (More)

We show that a simple non -linear system of ordinary differential equations may possess a time varying attractor dimension. This indicates that it is infeasible to characterize EEG and MEG timeâ€¦ (More)

- Gilbert Weinstein, Yosef Strauss, +4 authors Jacob Levitan
- Entropy
- 2018

Classical chaos is often characterized as exponential divergence of nearby trajectories. In many interesting cases these trajectories can be identified with geodesic curves. We define here theâ€¦ (More)

We show that Gutzwillerâ€™s characterization of chaotic Hamiltonian systems in terms of the curvature associated with a Riemannian metric tensor in the structure of the Hamiltonian can be extended to aâ€¦ (More)

- Baruch Rosenstein, Meir Lewkowicz, Tsofar Maniv
- Physical review letters
- 2013

The long-standing controversy concerning the effect of electron-electron interaction on the electrical conductivity of an ideal graphene sheet is settled. Performing the calculation directly in theâ€¦ (More)