相关实验视频
Updated: Oct 22, 2025

11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
7.6K
通过LC电路介导捕获的质子的同情冷却
M Bohman1,2, V Grunhofer3, C Smorra4,3
1Max-Planck-Institut für Kernphysik, Heidelberg, Germany. matthew.bohman@mpi-hd.mpg.de.
Nature
|August 26, 2021
概括
研究人员使用分离陷中的激光冷却离子展示了单个质子的同情冷却. 这一突破使得远程量子控制和冷却等奇特的粒子.
科学领域:
- 量子物理学
- 原子物理
- 粒子物理学
背景情况:
- 对于基本物理学,计量学和量子技术来说, 能有效地冷却被困的带电粒子至关重要.
- 交感冷却传统上需要近距离的库伦相互作用,限制了它的应用.
- 一个长期目标是将激光冷却技术扩展到宏观分离的陷中的粒子.
研究的目的:
- 在空间分离的Penning陷中使用激光冷却的Be+离子来证明单个质子的同情冷却.
- 探索远程量子控制和奇特粒子冷却的潜力.
主要方法:
- 使用两个空间分离的Penning陷,通过超导电路连接9厘米的能量交换.
- 使用激光冷却的离子 (Be+) 来同情冷却单个质子.
- 用激光冷却的离子证明了宏观LC电路的共振模式.
主要成果:
- 在单独的陷中使用激光冷却的Be+离子成功实现了单个质子的交感冷却.
- 陷之间的能量交换通过超导电路发生在9厘米的距离上.
- 温度远低于被困质子的环境温度.
结论:
- 这种技术可以在宏观分离的陷中对粒子进行同情冷却,克服以前的距离限制.
- 该方法依赖于图像电流相互作用,使其适用于具有挑战性的系统,如反质子.
- 促进了高精度计量,量子信息处理和物质与反物质比较的进步.
相关概念视频
LC Circuits
2.7K
An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
2.7K
Oscillations In An LC Circuit
2.6K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.6K
RLC Series Circuits
3.2K
An RLC series circuit comprises an inductor, a resistor, and a charged capacitor connected in series. When the circuit is closed, the capacitor begins to discharge through the resistor and inductor by transferring energy from the electric field to the magnetic field. Here, the resistor connected to the circuit causes energy losses; therefore, on the complete discharge of the capacitor, the magnetic field energy acquired by the inductor is less than the original electric field energy of the...
3.2K
Parallel RLC Circuits
1.1K
Street lamps equipped with RLC surge protectors are an excellent example of applying circuit analysis in practical scenarios. These surge protectors safeguard the lamp's components against sudden voltage spikes.
A simplified parallel RLC circuit model with a DC input source generating a step response is employed in this context. When the switch is turned on, Kirchhoff's current law is applied, leading to a second-order differential equation.
A simplified parallel RLC circuit model with a DC input source generating a step response is employed in this context. When the switch is turned on, Kirchhoff's current law is applied, leading to a second-order differential equation.
1.1K
RLC Circuit as a Damped Oscillator
1.5K
An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
1.5K
Design Example: Underdamped Parallel RLC Circuit
438
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
438

