We theoretically propose a cyclic quantum engine in which a single-qubit working medium undergoes finitetime unitary strokes with adjustable durations,followed by a projective measurement and an outcome-dependent cohe...We theoretically propose a cyclic quantum engine in which a single-qubit working medium undergoes finitetime unitary strokes with adjustable durations,followed by a projective measurement and an outcome-dependent coherent pulse(πorπ/2 rotation).The protocol separates two independent control handles:the unitary driving speedτdr,which governs nonadiabatic transitions and phase accumulation,and the measurement parameterθ,which sets the outcome probabilities and the magnitude of measurement-induced energy injection.展开更多
Single-pixel imaging (SPI) captures two-dimensional images utilizing a sequence of modulation patterns and measurements recorded by a single-pixel detector. However, the sequential measurement of a scene is time-consu...Single-pixel imaging (SPI) captures two-dimensional images utilizing a sequence of modulation patterns and measurements recorded by a single-pixel detector. However, the sequential measurement of a scene is time-consuming, especially for high-spatial-resolution imaging. Furthermore, for spectral SPI, the enormous data storage and processing time requirements substantially diminish imaging efficiency. To reduce the required number of patterns, we propose a strategy by optimizing a Hadamard pattern sequence via Morton frequency domain scanning to enhance the quality of a reconstructed spectral cube at low sampling rates. Additionally, we expedite spectral cube reconstruction, eliminating the necessity for a large Hadamard matrix. We demonstrate the effectiveness of our approach through both simulation and experiment,achieving sub-Nyquist sampling of a three-dimensional spectral cube with a spatial resolution of 256×256 pixels and181 spectral bands and a reduction in reconstruction time by four orders of magnitude. Consequently, our method offers an efficient solution for compressed spectral imaging.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.12465009)the Major Program of the Jiangxi Provincial Natural Science Foundation(Grant No.20224ACB201007)。
文摘We theoretically propose a cyclic quantum engine in which a single-qubit working medium undergoes finitetime unitary strokes with adjustable durations,followed by a projective measurement and an outcome-dependent coherent pulse(πorπ/2 rotation).The protocol separates two independent control handles:the unitary driving speedτdr,which governs nonadiabatic transitions and phase accumulation,and the measurement parameterθ,which sets the outcome probabilities and the magnitude of measurement-induced energy injection.
文摘Single-pixel imaging (SPI) captures two-dimensional images utilizing a sequence of modulation patterns and measurements recorded by a single-pixel detector. However, the sequential measurement of a scene is time-consuming, especially for high-spatial-resolution imaging. Furthermore, for spectral SPI, the enormous data storage and processing time requirements substantially diminish imaging efficiency. To reduce the required number of patterns, we propose a strategy by optimizing a Hadamard pattern sequence via Morton frequency domain scanning to enhance the quality of a reconstructed spectral cube at low sampling rates. Additionally, we expedite spectral cube reconstruction, eliminating the necessity for a large Hadamard matrix. We demonstrate the effectiveness of our approach through both simulation and experiment,achieving sub-Nyquist sampling of a three-dimensional spectral cube with a spatial resolution of 256×256 pixels and181 spectral bands and a reduction in reconstruction time by four orders of magnitude. Consequently, our method offers an efficient solution for compressed spectral imaging.
