11,363 research outputs found
The equation of state for scalar-tensor gravity
We show that the field equation of Brans-Dicke gravity and scalar-tensor
gravity can be derived as the equation of state of Rindler spacetime, where the
local thermodynamic equilibrium is maintained. Our derivation implies that the
effective energy can not feel the heat flow across the Rindler horizon.Comment: 6 pages, to be published in Prog. Theor. Phy
Gate-controllable spin-battery
We propose a gate-controllable spin-battery for spin current. The
spin-battery consists of a lateral double quantum dot under a uniform magnetic
field. A finite DC spin-current is driven out of the device by controlling a
set of gate voltages. Spin-current can also be delivered in the absence of
charge-current. The proposed device should be realizable using present
technology at low temperature.Comment: 3 pages, 3 figures, accepted by Appl. Phys. Let
Probing and Interaction at LHC
Many new physics models predict the existence of TeV-scale charged gauge
boson together with Higgs boson(s). We study the
interaction and explore the angular distribution of charged lepton to
distinguish from in process at the LHC. It is found that a new type forward-backward
asymmetry() relating to the angle between the direction of the charged
lepton in rest frame and that of the reconstructed in laboratory
frame is useful to investigate the properties of interaction. We
analyze the Standard Model backgrounds and develop a set of cuts to highlight
the signal and suppress the backgrounds at LHC. We find that can reach
0.03(-0.07) for () production at TeV
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