3,039 research outputs found
The production and decay of the top partner in the left-right twin higgs model at the ILC and CLIC
The left-right twin Higgs model (LRTHM) predicts the existence of the top
partner . In this work, we make a systematic investigation for the single
and pair production of this top partner through the processes:
e^{+}e^{-}\to t\ov{T} + T\bar{t} and T\ov{T}, the neutral scalar (the
SM-like Higgs boson or neutral pseudoscalar boson ) associate
productions e^{+}e^{-}\to t\ov{T}h +T\bar{t}h, T\ov{T}h,
t\ov{T}\phi^{0}+T\bar{t}\phi^{0} and T\ov{T}\phi^{0}. From the numerical
evaluations for the production cross sections and relevant phenomenological
analysis we find that (a) the production rates of these processes, in the
reasonable parameter space, can reach the level of several or tens of fb; (b)
for some cases, the peak value of the resonance production cross section can be
enhanced significantly and reaches to the level of pb; (c) the subsequent decay
of may generate typical phenomenological
features rather different from the signals from other new physics models beyond
the standard model(SM); and (d) since the relevant SM background is generally
not large, some signals of the top partner predicted by the LRTHM may be
detectable in the future ILC and CLIC experiments.Comment: 20pages, 15 figures and 6 Tables. Minor corrections on text. new
references adde
Enhancing teleportation of quantum Fisher information by partial measurements
The purport of quantum teleportation is to completely transfer information
from one party to another distant partner. However, from the perspective of
parameter estimation, it is the information carried by a particular parameter,
not the information of total quantum state that needs to be teleported. Due to
the inevitable noise in environment, we propose two schemes to enhance quantum
Fisher information (QFI) teleportation under amplitude damping noise with the
technique of partial measurements. We find that post partial measurement can
greatly enhance the teleported QFI, while the combination of prior partial
measurement and post partial measurement reversal could completely eliminate
the effect of decoherence. We show that, somewhat consequentially, enhancing
QFI teleportation is more economic than that of improving fidelity
teleportation. Our work extends the ability of partial measurements as a
quantum technique to battle decoherence in quantum information processing.Comment: Revised version, minor changes, accepted by Phys. Rev.
To Generalize Carath\'eodory's Continuity Theorem
Let be a homeomorphism from a circle domain
onto a domain . We obtain necessary and
sufficient conditions (1) for to have a continuous extension to the
closure and (2) for such an extension to be injective. Further
assume that is conformal and that has at most
countably many non-degenerate components whose diameters have a
finite sum . When the point
components of or those of form a set of
-finite linear measure, we can show that continuously extends
to if and only if all the components of are
locally connected. This generalizes Carath\'eodory's Continuity Theorem, that
concerns the case when is the open unit disk , and allows us to derive a new generalization of the
Osgood-Taylor-Caratheodry Theorem.
Here a Peano compactum is a compact metrisable space with locally connected
components such that for any at most finitely many of its components are
of diameter greater than .Comment: 39 pages, 3 figure
- β¦