نتایج جستجو برای: trap state
تعداد نتایج: 881693 فیلتر نتایج به سال:
A single $^{40}$Ca ion is confine in the harmonic potential of a Paul trap and cooled to temperature few mK, with wave packet sub-m spatial sub-m/s velocity uncertainty. Deterministically extracted from trap, propagating over distance 0.27 m detected. By engineering extraction process on initial packet, theoretically modeling trajectories, studying experimentally time-of-flight distribution, we...
In order to help detecting superfluidity, we theoretically investigate p-wave pairing superfluids in neutral Fermion atom gases confined by a three dimensimentional (3D) harmonic potential. The Ginzburg-Landau framework, which is generic for p-wave superfluids, is used to describe the order parameter spatial structure, or texture characterized by the l-vector both at rest and under rotation. Th...
Colloidal quantum dot (CQD) films allow large-area solution processing and bandgap tuning through the quantum size effect. However, the high ratio of surface area to volume makes CQD films prone to high trap state densities if surfaces are imperfectly passivated, promoting recombination of charge carriers that is detrimental to device performance. Recent advances have replaced the long insulati...
In [7], Jan Černý conjectured that an arbitrary directable automaton with n states has a directing word of length not longer than (n−1). This conjecture is one of the most longstanding open problems in the theory of finite automata. Most of papers dealing with this conjecture reduce the problem to special classes of automata. In present paper we deal with this conjecture in the class of automat...
Perovskite solar cells are well-known for their high energy conversion efficiency, low-temperature processing, and cost-effective production. Flash infrared annealing (FIRA) of slot-die cast perovskite precursors offers an attractive manufacturing route using high-throughput roll-to-roll technology. Despite the recent progress in FIRA annealing, optimal composition precursor is yet to be develo...
A rapid second order phase transition can have a significant probability of producing a metastable state instead of the equilibrium state. We consider the case of rapid BoseEinstein condensation in a toroidal trap resulting in a spontaneous superfluid current, and compare the phenomenological time-dependent Ginzburg-Landau theory with quantum kinetic theory. A simple model suggests the effect s...
We present an effective method of coherent state superposition (cat state) generation using single trapped ion in a Paul trap. The method is experimentally feasible for coherent states with amplitude α ≤ 2 using available technology. It works both in and beyond the Lamb-Dicke regime.
In 2010, the World Bank categorized countries in per capita gross domestic product in terms of purchasing power parity (at constant 1990 prices) in three categories: low, middle (lower and upper) and high income. If a country caught at least 28 years in lower middle income level and at least 14 years caught in upper middle-income level, then they are trapped in lower middle and upper middle...
Recent experimental and theoretical work has shown that there are conditions in which a trapped, low-density Bose gas behaves like the one-dimensional delta-function Bose gas solved years ago by Lieb and Liniger. This is an intrinsically quantum-mechanical phenomenon because it is not necessary to have a trap width that is the size of an atom – as might have been supposed – but it suffices mere...
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