搜索结果: 16-23 共查到“知识库 量子声学”相关记录23条 . 查询时间(1.89 秒)
Do revivals of quantum correlations necessarily require quantum noise?
revivals quantum correlations necessarily quantum noise
2010/10/21
We show that in an N-partite system, where each subsystem is subject to a local completely
positive map, total correlations cannot, at later times, exceed their initial value. We then analyze the dyn...
We consider the problem of improving noisy quantum measurements by suitable preprocessing
strategies making many noisy detectors equivalent to a single ideal detector. For observables per-taining to ...
Efficient polarization qubit transmission assisted by frequency degree of freedom
Efficient polarization qubit frequency degree of freedom
2010/10/18
We present an efficient arbitrary polarization qubit transmission scheme against channel noise
by utilizing frequency degree of freedom, which is more stable in transmission surroundings. The informa...
Security of quantum key distribution with state-dependent imperfections
quantum key distribution state-dependent imperfection security
2010/10/18
In practical quantum key distribution (QKD) system, the state prepara-tion and measurement are imperfect comparing with the ideal BB84 proto-col, which are always state-dependent in practical realizat...
针对均匀传感器线阵应用被动合成孔径技术进行扩展阵列中存在阵元数较多利用率较低，且噪声累积误差问题，提出了一种基于最小冗余线阵的阵列扩展方法。该算法将四阶累积量方法和被动合成孔径技术相结合，能够采用较少的阵元获得较大的阵列扩展效果。先用四阶累积量方法对最小冗余阵作匀速直线运动采集的连续测量量作预处理，获得虚拟均匀线阵效果，而后，利用重叠相关器处理上述数据组获得相位修正因子补偿连续测量时产生的相位差，...
Quantum Fluctuations Contribution to the Random Walk of a Single Molecule and New Estimate of the Planck Constant
Quantum Fluctuations Random Walk Planck Constant
2010/3/10
It is shown, by considering the case of the harmonic oscillator, that quantum fluctuations may be the most significant contribution to the random walk of a single molecule. From this point, the contro...
Triply-resonant Optical Parametric Oscillator by Four-wave Mixing with Rubidium Vapor inside an Optical Cavity
Optical Parametric Oscillator Four-wave Mixing Optical Cavity
2010/3/10
We present an experimental demonstration of simultaneous above-threshold oscillations of the Stokes and anti-Stokes fields together with the single pumping beam with rubidium atoms inside an optical s...
Statistics and noise in a quantum measurement process
Statistics noise quantum measurement process
2010/10/18
The quantum measurement process by a single-electron transistor or a quantum point contact coupled to a quantum bit is studied. We find a unified description of the statistics of the monitored quantit...