Development of new method for observing molecular dynamics utilizing quantum entanglement

开发利用量子纠缠观察分子动力学的新方法

• 批准号: 17550005
• 负责人: OHTSUKI Yukiyoshi
• 金额: $ 1.6万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17550005/
• 关键词: entangled state; optimal control theory; molecular spectroscopy; quantum information; quantum computation; geometric phase effect; conical intersection; 量子制御; 位相緩和; 分子分光; 量子干渉

We have developed a generalized algorithm for solving optimal control problems. The new simulation algorithm has been applied to the creation and control of intramolecular entangled state, which enabled us to develop novel spectroscopic procedures.Coherent control of a molecular wave function with extreme precision is essential to create and control a specified intramolecular entangled state. For this purpose, a closed-loop (optimal control) experiment has already developed. We have applied its theoretical counterpart, optimal control theory, to representative examples, which include non-adiabatic transitions induced by a conical intersection, and adsorbed molecules under the influence of strong dissipation. The latter could be regarded as a model system of quantum devices.Quantum entanglement plays an essential role in quantum information processing. We combined quantum computation with a spectroscopic method. That is, typical quantum gates (CNOT, quantum Fourier transform) implemented in molecular degrees of freedom has been shown to be detected by a newly designed quantum interferometer. We have also shown that photo-fragmentation products induced by geometric phase effects can be used to efficiently detect intramolecular entangled states.

我们已经开发了一种用于解决最佳控制问题的广义算法。新的仿真算法已应用于分子内纠缠状态的创建和控制，这使我们能够开发新的光谱程序。对具有极高精确度的分子波函数的共控制对于创建和控制指定的分子内分子纠缠状态至关重要。为此，已经开发了闭环（最佳控制）实验。我们已将其理论对应物，最佳控制理论应用于代表性的例子，其中包括由圆锥形相交引起的非绝热跃迁，以及在强耗散影响的影响下被吸附的分子。后者可以被视为量子设备的模型系统。Quantum纠缠在量子信息处理中起着至关重要的作用。我们将量子计算与光谱法相结合。也就是说，已经证明，新设计的量子干涉仪检测到以分子自由度实现的典型量子门（CNOT，量子傅立叶变换）。我们还表明，通过几何相效应诱导的光碎片分裂产物可用于有效检测分子内纠缠状态。

项目成果

Implementation of gate operations in molecules with weak laser fields

利用弱激光场在分子中实现门操作

• 发表时间: 2006
• 期刊: J. Chem. Phys. 124
• 作者: Y.Teranishi;Y.Ohtsuki;K.Hosaka;H.Chiba;H.Katsuki;K.Ohmori
• 通讯作者: K.Ohmori

Geometric phase effects in the coherent control of the branching ration of photodissociation products of phenol

苯酚光解产物支化比相干控制中的几何相位效应

• 发表时间: 2006
• 期刊: The Journal of Chemical Physics 124
• 作者: M.Abe;Y.Ohtsuki;Y.Fujimura;Z.Lan;W.Domcke
• 通讯作者: W.Domcke

Optimal control of ultrafast photoisomerization of retinal in rhodopsin via a conical intersection

通过圆锥形交叉点优化控制视紫红质中视网膜的超快光异构化

• 发表时间: 2005
• 期刊: The Journal of Chemical Physics 123
• 作者: M.Abe;Y.Ohtsuki;Y.Fujimura;W.Domcke
• 通讯作者: W.Domcke

Optimal control in a dissipative system : IR pulse excitation of CO/Cu(110)

耗散系统中的最优控制：CO/Cu(110) 的红外脉冲激励

• 发表时间: 2006
• 期刊: The Journal of Chemical Physics 124
• 作者: S.Beyvers;Y.Ohtsuki;P.Saalfrank
• 通讯作者: P.Saalfrank

Monotonically convergent algorithms for solving quantum optimal control problems described by an integro-differential equatin of motion

用于解决由运动积分微分方程描述的量子最优控制问题的单调收敛算法

• 发表时间: 2007
• 期刊: Phys. Rev. A. 75
• 作者: Y.Ohtsuki;Y.Tarnish;P.Saalfrank;G.Tuninici;H.Rabitz
• 通讯作者: H.Rabitz