Kienzler D, Lo H-Y, Negnevitsky V, Flühmann C, Marinelli M, Home J P
Institute for Quantum Electronics, ETH Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.
Phys Rev Lett. 2017 Jul 21;119(3):033602. doi: 10.1103/PhysRevLett.119.033602.
We demonstrate control of a trapped-ion quantum harmonic oscillator in a squeezed Fock state basis, using engineered Hamiltonians analogous to the Jaynes-Cummings and anti-Jaynes-Cummings forms. We demonstrate that for squeezed Fock states with low n the engineered Hamiltonians reproduce the sqrt[n] scaling of the matrix elements which is typical of Jaynes-Cummings physics, and also examine deviations due to the finite wavelength of our control fields. Starting from a squeezed vacuum state, we apply sequences of alternating transfer pulses which allow us to climb the squeezed Fock state ladder, creating states up to excitations of n=6 with up to 8.7 dB of squeezing, as well as demonstrating superpositions of these states. These techniques offer access to new sets of states of the harmonic oscillator which may be applicable for precision metrology or quantum information science.
我们展示了在压缩福克态基下对囚禁离子量子谐振子的控制，使用了类似于杰恩斯 - 卡明斯和反杰恩斯 - 卡明斯形式的工程哈密顿量。我们证明，对于低(n)的压缩福克态，工程哈密顿量重现了杰恩斯 - 卡明斯物理中典型的矩阵元(\sqrt{n})缩放规律，并且还研究了由于我们控制场的有限波长引起的偏差。从压缩真空态开始，我们应用交替转移脉冲序列，这使我们能够攀登压缩福克态阶梯，创建高达(n = 6)激发且压缩高达(8.7)分贝的态，同时还展示了这些态的叠加。这些技术提供了访问谐振子新态集的途径，这可能适用于精密计量或量子信息科学。
