How Do Schrödinger's Cats Die?

多模系统中薛定谔猫态贝尔态的快速初始化

Fast initialization of Bell states with Schrödinger cats in multi-mode systems

本文提出通过绝热和非绝热切换Kerr型哈密顿量，高效变换多模猫态，直接初始化纠缠贝尔态，避免从Fock态初始化，为猫量子比特纠缠提供快速方案。

Spontaneous emission of Schrödinger cats in a waveguide at ultrastrong coupling

Josephson circuits provide a realistic physical setup where the light-matter fine structure constant can become of order one, allowing to reach a regime dominated by non-perturbative effects beyond standard quantum optics. Simple processes, such as spontaneous emission, thus acquire a many-body character, that can be tackled using a new description of the time-dependent state vector in terms of quantum-superposed coherent states. We find that spontaneous atomic decay at ultrastrong coupling leads to the emission of spectrally broad Schrödinger cats rather than of monochromatic single photons. …

Schrödinger cats in quantum-dot--cavity systems

A Schrödinger-cat state is a coherent superposition of macroscopically distinguishable quantum states, in quantum optics usually realized as superposition of coherent states. Protocols to prepare photonic cats have been presented for atomic systems. Here, we investigate in what manner and how well the preparation protocols can be transferred to a solid state platform, namely a semiconductor quantum-dot--cavity system. In quantum-dot--cavity systems there are many disruptive influences like cavity losses, the radiative decay of the quantum dot, and the pure-dephasing type coupling to longitudin…

二维Chern-Simons-薛定谔系统简化为一维

The 2D Chern-Simons-Schr{ö}dinger system reduced to 1D

该研究通过引入强各向异性陷阱势，将二维Chern-Simons-薛定谔系统简化为一维五次非线性薛定谔方程，揭示了二维任意子系统在波导中的有效动力学行为。