In this article, we reconsider a version of quantum trajectory theory based on the stochastic Schrödinger equation with stochastic coefficients, which was mathematically introduced in the 1990s, and we develop it in order to describe the non-Markovian evolution of a quantum system continuously measur...
A. Quantum bits. B. Classical bits. C. Quantum particles. D. Classical particles. 相关知识点: 试题来源: 解析 A。本题考查“qubits”的含义。“qubits”是“quantum bits”的缩写,即量子比特。B 选项“经典比特”错误。C 选项“量子粒子”不准确。D 选项“经典粒子”错误。反馈...
Hence, complete positivity of Φt is sufficient but not necessary for complete positivity of the dynamical map Λt. Note, however, if Φt is not completely positive the intuitive interpretation of the series (2.17) in terms of quantum jumps is no longer valid. Time inhomogeneous evolution Time...
A Schroedinger picture analysis of time dependent quantum oscillators, in a manner of Guth and Pi, clearly identifies two physical mechanisms for possible decoherence of vacuum fluctuations in the early universe: turning of quantum oscillators upside-down, and rapid squeezing of upside-right oscillators...
However, creating such an inherent phase is still a pending challenge. Here we report in both theory and experiment that inherent time crystals can be realized in a dissipative quantum system, which represents built-in phases of many-body systems that do not rely on recurring forces or cavities...
Entropy squeezing for a two-level atom in the Jaynes-Cummings model with an intensity-depend coupling We study the squeezing for a two-level atom in the Jaynes-Cumings model with intensity-dependent coupling using quantum information entropy,and examine the... 李春先,方卯发 - 《中国物理B(英文...
(Phys.org)—For the past few years, physicists have been intrigued by a hypothetical system called a "quantum time crystal," which has the unusual property of exhibiting periodic motion in its ground state, which is its state of lowest energy. This behavior is unexpected, as it suggests that...
However the Milky Way magnetic field is not large enough to generate an observable signal, even with ASTRO-H. In contrast, M31 has optimal conditions ... JP Conlon,FV Day - 《Journal of Cosmology & Astroparticle Physics》 被引量: 76发表: 2014年 Quantum Mechanics and Discrete Time from "Ti...
The ambition of harnessing the quantum for computation is at odds with the fundamental phenomenon of decoherence. The purpose of quantum error correction (QEC) is to counteract the natural tendency of a complex system to decohere. This cooperative process, which requires participation of multiple qu...
Time-series processing is a major challenge in machine learning with enormous progress in the last years in tasks such as speech recognition and chaotic series prediction. A promising avenue for sequential data analysis is quantum machine learning, with