Physical review. A/Physical review, A, Год журнала: 2024, Номер 110(6)
Опубликована: Дек. 16, 2024
Язык: Английский
The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 4372 - 4381
Опубликована: Апрель 24, 2025
Photochemistry is a powerful tool for synthesizing important molecules that are challenging to create without light. We report compelling results indicate photochemical reaction rate (oxygenation) can be notably enhanced by utilizing very small number of entangled photons. Measurements with the same classical photons show product formation considerably lower. This suggests many orders magnitude. Theoretical calculations and excite photocatalyst different final excited states. chemical synthesis approach could have large impact on our understanding reactivity provide new insights into processes.
Язык: Английский
Процитировано
0
Proceedings of the National Academy of Sciences, Год журнала: 2025, Номер 122(18)
Опубликована: Май 2, 2025
Traditional quantum imaging is featured by remarkable sensitivity and signal-to-noise ratio, but limited bulkiness static function (either phase contrast or edge detection). Our report synergizes a polarization-entangled source with metasurface consisting of various sophisticatedly engineered spatial frequency segments. By tuning polarization, we demonstrate multiple “on”-state modes, enabling flexible switching between contrast, edge, arbitrary superimposed mode. Furthermore, the “off”-state, which characterizes background noise, enables self-calibration system subtracting this noise in resulting self-enhanced detection. approach performs difference π/4 present target object, capable detecting tiny (radius about 2 μm) defects, maintaining high image (phase 0.726, enhanced 0.902). results provide insights into constructive duet metaoptics.
Язык: Английский
Процитировано
0
Nano Letters, Год журнала: 2025, Номер unknown
Опубликована: Май 6, 2025
Quantum image distillation aims to extract the signal from a mixture of and noise images that are indistinguishable in terms spectrum polarization, process is unachievable with classical methods. However, contrast amplitude image, phase challenging via direct spatial or temporal correlation photon pairs. Incorporating polarization entanglement pairs, it demonstrated here can be quickly distilled by using an integrated computing metasurface solve Poisson equation. The proposed technique remains robust even levels two orders higher than signal, potential applications quantum communication cryptography. Based on present scheme, also enables measurement wave function achievement noninterferometric quantum-enhanced quantitative imaging. Our work involving integrated-metasurface analogue paves way for advancing efficient rapid information processing.
Язык: Английский
Процитировано
0
Journal of Physics Photonics, Год журнала: 2024, Номер 6(3), С. 033001 - 033001
Опубликована: Май 27, 2024
Abstract Quantum imaging enhances systems performance, potentially surpassing fundamental limits such as noise and resolution. However, these schemes have limitations are still a long way from replacing classical techniques. Therefore, there is strong focus on improving the practicality of quantum methods, with goal finding real-world applications. With this in mind, tutorial we describe how concepts light shaping can be applied to based entangled photon pairs. We detail two basic experimental configurations which spatial modulator used shape correlations pair state highlight key differences between shaping. then showcase recent examples that expand perform aberration scattering correction include specific details steps experiments, guide for building photon-pair-based experiments.
Язык: Английский
Процитировано
1
Chinese Physics Letters, Год журнала: 2024, Номер 41(7), С. 074205 - 074205
Опубликована: Июнь 21, 2024
Abstract High-order quantum coherence reveals the statistical correlation of particles. Manipulation light in temporal domain enables production single-photon source, which has become one most important resources. spatial plays a crucial role variety applications, such as imaging, holography, and microscopy. However, active control second-order remains challenging task. Here we predict theoretically demonstrate experimentally first manipulation coherence, exhibits capability switching between bunching anti-bunching, by mapping entanglement spatially structured photons. We also show that signal processing based on robust resistance to intensity disturbance. Our findings not only enhance existing applications but pave way for broader utilization higher-order coherence.
Язык: Английский
Процитировано
1
Physical Review Applied, Год журнала: 2024, Номер 22(6)
Опубликована: Дек. 10, 2024
Structured optical fields have led to several ground-breaking techniques in classical imaging and microscopy. At the same time, quantum domain, position-momentum entangled photon been shown unique features that can lead beyond-classical microscopy capabilities. Therefore, it is natural expect two-photon are structured push boundaries of even further beyond. Nonetheless, existing experimental schemes able produce either without entanglement, or structures. In this article, by manipulating phase-matching condition spontaneous parametric down-conversion process, we report generation with various structures their spatial correlations. We experimentally measure minimum bound on entanglement formation thereby verify field. work important implications for technologies related sensing.
Язык: Английский
Процитировано
1
Optica Quantum, Год журнала: 2024, Номер 2(4), С. 206 - 206
Опубликована: Май 23, 2024
Efficient measurement of high-dimensional quantum correlations, especially spatial ones, is essential for technologies. We propose and demonstrate an adaptively gated hybrid intensified camera (HIC) that combines the information from a high resolution sensor temporal detector, offering precise control over number photons detected within each frame. The HIC facilitates spatially resolved single-photon counting measurements. study momentum correlations photon pairs generated in type-I spontaneous parametric downconversion with possibility time-tagging registered photons. With multi-megapixels nanosecond resolution, this system allows realization previously infeasible optics experiments.
Язык: Английский
Процитировано
0
Physical Review Letters, Год журнала: 2024, Номер 133(3)
Опубликована: Июль 16, 2024
With an extremely high dimensionality, the spatial degree of freedom entangled photons is a key tool for quantum foundation and applied techniques.To fully utilize feature, essential task to experimentally characterize multiphoton wave function including amplitude phase information at different evolutionary stages.However, there no effective method measure it.Quantum state tomography costly, holography requires additional references.Here, we introduce Shack-Hartmann wavefront sensing perform efficient reference-free measurement biphoton function.The joint probability distribution photon pairs back focal plane microlens array measured used extraction reconstruction.In experiment, observe that correlation becomes weak while shows up during free-space propagation.Our work crucial step in physical adaptive optics paves way characterizing optical fields with high-order correlations or topological patterns.
Язык: Английский
Процитировано
0
Optica Quantum, Год журнала: 2024, Номер 2(5), С. 303 - 303
Опубликована: Авг. 9, 2024
Entangled photons provide transformative new paths in the fields of communication, sensing, and computing. However, when entangled propagate through a complex medium, their correlations are scrambled. Using wavefront shaping to compensate for scattering retrieve two-photon is challenging due low signal-to-noise ratio signal. While previous works partly addressed this challenge by using feedback from strong classical laser beam that co-propagates with photons, such methods frequently depend on assumptions about limiting applicability quantum shaping. In work, we propose demonstrate mechanism inspired Klyshko’s advanced wave picture: emitted one detection modes, counter-propagates reflects at crystal plane, other. The Klyshko allows compensation arbitrary samples even situations where each photon propagates different medium. Since picture applies whenever optical reciprocity valid, optimization can be used across wide range configurations, offering robust alignment-free setup. We therefore believe protocol will open door real-world applications
Язык: Английский
Процитировано
0
Optics Express, Год журнала: 2024, Номер 32(23), С. 40283 - 40283
Опубликована: Окт. 14, 2024
Photon-based entanglement sources, crucial for obtaining entangled states, are typically generated via spontaneous parametric down-conversion. However, birefringence in nonlinear crystals causes spatial or temporal walk-off, reducing photon quality. The theoretical analysis attributes birefringent walk-off to dispersive materials curbed by pre- and post-compensation. We experimentally validate this method, enhancing polarization-entangled measured the Bell state along with a violation of CHSH-Bell’s inequality ∼366 standard deviations ( S = 2.623 ± 0.0017). Our approach, simple stable, does not complicate setups. Its applicability extends optimizing various source schemes, aiding optical quantum technologies such as computation, sensing, communication.
Язык: Английский
Процитировано
0