Quantum sensing of ultralow temperature in biwire ultracold polar molecules

IF 2.9 2区 物理与天体物理 Q2 Physics and Astronomy
Abdelâali Boudjemâa, Karima Abbas, Asma Tahar Taiba, Qing-Shou Tan
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引用次数: 0

Abstract

We present a systematic study of quantum sensing of ultralow temperature in biwire ultracold polar molecules of a quasi-one-dimensional (1D) trap by exploring the dynamics of two physically different qubit models. The two models consist of a trapped impurity atom that act as a temperature quantum sensor interacting with polar molecules reservoir, where dipole moments are aligned head-to-tail across the wires. Our model takes advantage of the adjustable interwire distance to accurately control the precision ultralow temperatures measurement. We show that the system undergoes a transition from Markovian to non-Markovian dynamics, which can be controlled by changing the interwire separation, the dipole-–dipole interaction (DDI), and the temperature. We characterize the thermometric performance using the quantum signal-to-noise ratio for both models and demonstrate that such a quantity exhibits a higher peak at ultralow temperature. We therefore emphasize that ultracold polar molecules are crucial for revolutionizing temperature sensing.

Abstract Image

双线超冷极性分子的超低温量子传感
我们通过探索两种物理上不同的量子比特模型的动力学,对准一维(1D)陷阱的双线超冷极性分子中的超低温量子传感进行了系统研究。这两种模型都由一个被困的杂质原子组成,该杂质原子作为温度量子传感器与极性分子储层相互作用,其中偶极矩在导线上头尾对齐。我们的模型利用可调节的导线间距来精确控制超低温测量的精度。我们的研究表明,该系统经历了从马尔可夫动力学到非马尔可夫动力学的转变,这种转变可以通过改变导线间距、偶极子-偶极子相互作用(DDI)和温度来控制。我们利用这两种模型的量子信噪比来描述测温性能的特点,并证明这种量子信噪比在超低温下显示出更高的峰值。因此,我们强调,超冷极性分子对于温度传感的革命至关重要。
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来源期刊
Physical Review A
Physical Review A 物理-光学
CiteScore
5.40
自引率
24.10%
发文量
0
审稿时长
2.2 months
期刊介绍: Physical Review A (PRA) publishes important developments in the rapidly evolving areas of atomic, molecular, and optical (AMO) physics, quantum information, and related fundamental concepts. PRA covers atomic, molecular, and optical physics, foundations of quantum mechanics, and quantum information, including: -Fundamental concepts -Quantum information -Atomic and molecular structure and dynamics; high-precision measurement -Atomic and molecular collisions and interactions -Atomic and molecular processes in external fields, including interactions with strong fields and short pulses -Matter waves and collective properties of cold atoms and molecules -Quantum optics, physics of lasers, nonlinear optics, and classical optics
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