We consider the transversal modes of ions in a linear radio frequency (rf) trap where we control the time dependent axial confinement to show that we can excite quanta of motion via a two-mode squeezing process. This effect is analogous to phenomena predicted to occur during the evaporation of black holes and cosmological particle creation, in general out of reach for experimental investigation. As substantial advantage of this proposal in comparison to previous ones we propose to exploit radial and axial modes simultaneously to permit experimental access of these effects based on state-of-the-art technology. In addition, we propose to create and explore entanglement, starting with two ions, and relate the results to fundamental aspects of the entropy of black holes.
Tailored Ion Beam for Precise Color Center Creation
我们提出了一个单一的量子控制方案，产生一个高度单色的离子束从保罗陷阱。我们的协议是可实施的，通过提供电压的顺序的电压的分段电极，这减轻了波动的电压在以前的设计的影响，并导致低色散离子束。此外，我们的建议不依赖于同情地冷却离子，这绕过了在阱中装载不同物种的需要-即，被推进的离子，例如，$^{40}$ Ca $^+$原子能够施加交感神经冷却--增加发射过程的重复率。我们的计划是基于一个不变的运营商线性的位置和动量，这使我们能够控制平均提取能量和传出的动量传播。此外，我们提出了一个顺序的操作，以定制的横向特性的射束喷射前，以尽量减少影响点，并增加横向分辨率的注入。
Engineering the unitary charge-conjugation operator of quantum field theory for particle-antiparticle using trapped ions and light fields in cavity QED
Demonstration of a dressed-state phase gate for trapped ions
我们演示了Bermudez等人提出的捕获离子纠缠门方案。[Phys. Rev. A 85，040302（2012）]。强载流子和单边带跃迁的同时激发使得能够确定性地产生纠缠态。该方法适用于磁场不敏感状态，对热激发是鲁棒的，包括从量子位退相误差的动态解耦，并且与具有捕获离子的一些其他纠缠门相比，在实验实现中提供了简化。我们实现了0.974（4）的贝尔态保真度，并确定了主要的误差来源。
