Adiabatic vacua are known to be Hadamard states. We show, however that the energy-momentum tensor of a linear Klein-Gordon eld on Robertson-Walker spaces developes a generic singularity on the initial hypersurface if the adiabatic vacuum is of order less than four. Therefore, adiabatic vacua are physically reasonable only if their order is at least four. A certain non-local large momentum expan...

The Energy dissipation in conventional CMOS circuits can be minimized through adiabatic technique. By adiabatic technique dissipation in PMOS network can be minimized and some of energy stored at load capacitance can be recycled instead of dissipated as heat. But the adiabatic technique is highly dependent on parameter variation. The intension of the paper is to implement combinational and sequ...

We reveal universal dynamical scaling behavior across adiabatic quantum phase transitions in networks ranging from traditional spatial systems (Ising model) to fully connected ones (Dicke and Lipkin-Meshkov-Glick models). Our findings, which lie beyond traditional critical exponent analysis and adiabatic perturbation approximations, are applicable even where excitations have not yet stabilized ...

A previous theory for studying the distribution of non-uniform fields in multiple-quantum-well photodetectors under an ac voltage is generalized by including non-adiabatic space-charge-field effects. Numerical calculations indicate that field-domain effects are only important at high temperatures or high voltages when both injection and sequentialtunneling currents are significant. On the other...

The adiabatic manipulation of quantum states is a powerful technique that opened up new directions in quantum engineering--enabling tests of fundamental concepts such as geometrical phases and topological transitions, and holding the promise of alternative models of quantum computation. Here we benchmark the stimulated Raman adiabatic passage for circuit quantum electrodynamics by employing the...

Data collected in situ with the Meteo-France Merlin-IV instrumented aircraft during the EUCREX mission 206 are analyzed to document cloud properties that are relevant to the calculation of cloud radiative properties. Ascents and descents through the cloud layer reveal that Ž . most of the vertical profiles of liquid water content LWC and droplet sizes are close to adiabatic profiles. Analysis o...

The novel design of various adiabatic adders based on pass transistor logic is introduced. Also, a new I-bit full adder basic cell with a small number of transistors is designed. The architectural design of each adiabatic adder and new formulas for their corresponding delay, are presented. The performance of various adiabatic adders, in this work, against the performance of theirs CMOS counterp...

The conventional formulation of the non-adiabatic (Aharonov-Anandan) phase is based on the equivalence class {eα(t)ψ(t, ~x)}. This equivalence class when understood as defining generalized rays in the Hilbert space is not generally consistent with the superposition principle in interference and polarization phenomena. The hidden local gauge symmetry, which arises from the arbitrariness of the c...

Abstract An optimisation study of a shock-wave-focusing geometry is presented in this work. The configuration serves as reliable and deterministic detonation initiator pulsed engine. combustion chamber consists circular pipe with one convergent–divergent axisymmetric nozzle, acting focusing device for an incoming shock wave. Geometrical changes are proposed to reduce the minimum wave strength n...

A recently developed perturbation theory for solving self-consistent-eld equations is applied to the hydrogen atom in a strong magnetic eld. This system has been extensively studied using other methods and is therefore a good test case for the new method. The perturbation theory yields summable large-order expansions. The accuracy of the self-consistent-eld approximation varies according to eld...