Results 41 to 50 of about 1,036,661 (329)

Nucleon excited states on the lattice [PDF]

, 2013
We study the pion-nucleon system in s-wave in the framework of lattice QCD in order to gain new information on the nucleon excited states. We perform simulations for $n_f =2$ mass degenerate light quarks at a pion mass of 266 MeV.
Lang, C. B., Verduci, V.
core   +1 more source

Effects of spin–orbit coupling and many-body correlations in STM transport through copper phthalocyanine

Beilstein Journal of Nanotechnology, 2015
The interplay of exchange correlations and spin–orbit interaction (SOI) on the many-body spectrum of a copper phtalocyanine (CuPc) molecule and their signatures in transport are investigated.
Benjamin Siegert, Andrea Donarini, Milena Grifoni   +2 more
doaj   +1 more source

Universal Nonadiabatic Control of Small-Gap Superconducting Qubits

Physical Review X, 2020
Resonant transverse driving of a two-level system as viewed in the rotating frame couples two degenerate states at the Rabi frequency, an equivalence that emerges in quantum mechanics.
Daniel L. Campbell, Yun-Pil Shim, Bharath Kannan, Roni Winik, David K. Kim, Alexander Melville, Bethany M. Niedzielski, Jonilyn L. Yoder, Charles Tahan, Simon Gustavsson, William D. Oliver   +10 more
doaj   +1 more source

New Insights into the Lamb Shift: The Spectral Density of the Shift

Physics, 2022
In an atom, the interaction of a bound electron with the vacuum fluctuations of the electromagnetic field leads to complex shifts in the energy levels of the electron, with the real part of the shift corresponding to a shift in the energy level and the ...
G. Jordan Maclay
doaj   +1 more source

Single and double qubit gates by manipulating degeneracy

, 2001
A novel mechanism is proposed for single and double qubit state manipulations in quantum computation with four-fold degenerate energy levels. The principle is based on starting with a four fold degeneracy, lifting it stepwise adiabatically by a set of ...
A. Barenco, A.J. Leggett, A.J. Leggett, A.O. Caldeira, A.O. Caldeira, D. Deutsch, D.J. Wineland, D.P. DiVincenzo, F. Wellstood, G. Zimmerli, Gianni Blatter, Guiseppe Falci, I.L. Chuang, J. Anderson, J. Clarke, J.E. Mooij, Jonathan R. Friedman, L.J. Geerligs, Lev. B. Ioffe, M.F. Bocko, R. Rouse, S. Lloyd, T. Hakioğlu, T.P. Orlando, Y. Nakamura, Yuriy Makhlin   +25 more
core   +1 more source

Energy levels of few-electron quantum dots imaged and characterized by atomic force microscopy [PDF]

Proceedings of the National Academy of Sciences of the United States of America, 2009
Strong confinement of charges in few-electron systems such as in atoms, molecules, and quantum dots leads to a spectrum of discrete energy levels often shared by several degenerate states.
L. Cockins, Y. Miyahara, S. Bennett, A. Clerk, S. Studenikin, P. Poole, A. Sachrajda, P. Grutter   +7 more
semanticscholar   +1 more source

Quantum coherence-control of thermal energy transport: the V model as a case study

New Journal of Physics, 2022
Whether genuine quantum effects, particularly quantum coherences, can offer an advantage to quantum devices is a topic of much interest. Here, we study a minimal model, the three-level V system coupled to two heat baths, and investigate the role of ...
Felix Ivander, Nicholas Anto-Sztrikacs, Dvira Segal   +2 more
doaj   +1 more source

k-dependent spectrum and optical conductivity near metal-insulator transition in multi-orbital Hubbard bands

, 2004
We apply the dynamical mean field theory (DMFT) in the iterative perturbation theory(IPT) to doubly degenerate eg bands and triply degenerate tg bands on a simple cubic lattice and calculate the spectrum and optical conductivity in arbitrary electron ...
Andersen O. K., Anisimov V. I., Aryanpour K., Bickers N. E., Biermann S., de Brito P. E., Fujiwara T., Georges A., Georges A., Georges A., Han J. E., Hedin L., Held K., Kajueter H., Kuramoto Y., Lichtenstein A. I., Lichtenstein A. I., Luttinger J. M., Müller-Hartmann E., Pruschke Th., Rosenberg M. J., Rozenberg M. J.   +21 more
core   +1 more source

Ultrafast carrier dynamics in Landau-quantized graphene

Nanophotonics, 2015
In an external magnetic field, the energy of massless charge carriers in graphene is quantized into non-equidistant degenerate Landau levels including a zero-energy level.
Wendler Florian, Knorr Andreas, Malic Ermin   +2 more
doaj   +1 more source

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source