热薛定谔猫态
Hot Schrödinger Cat States
AI总结：
本研究通过保持初始低纯度的动力学，仅利用与 transmon qubit 的幺正相互作用，在微波腔内制备出初始纯度低至0.06的“热”薛定谔猫态，为难以实现基态冷却的连续变量系统提供了新途径。
摘要：
对量子现象的观测通常需要足够纯的状态，这一要求往往难以实现。在本研究中，我们的目标是通过保持状态初始低纯度的动力学，从混合态出发制备一个非经典态。我们仅通过与 transmon qubit 的幺正相互作用，在微波腔内生成了平移热态的量子叠加。我们测量了这些“热”薛定谔猫态的 Wigner functions，初始纯度低至 0.06。这相当于腔模温度高达 1.8 Kelvin，比腔体的物理环境热六十倍。我们对高度混合量子叠加态的实现，可推广至其他连续变量系统（例如 nanomechanical oscillators），这类系统的基态冷却目前仍具挑战性。
英文摘要：
The observation of quantum phenomena often necessitates sufficiently pure states, a requirement that can be challenging to achieve. In this study, our goal is to prepare a non-classical state originating from a mixed state, utilizing dynamics that preserve the initial low purity of the state. We generate a quantum superposition of displaced thermal states within a microwave cavity using only unitary interactions with a transmon qubit. We measure the Wigner functions of these ``hot'' Schrödinger cat states for an initial purity as low as 0.06. This corresponds to a cavity mode temperature of up to 1.8 Kelvin, sixty times hotter than the cavity's physical environment. Our realization of highly mixed quantum superposition states could be implemented with other continuous-variable systems e.g. nanomechanical oscillators, for which ground-state cooling remains challenging.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
