Abstract Robust boundary states epitomize how deep physics can give rise to concrete experimental signatures with technological promise. Of late, much attention has focused on two distinct mechanisms for robustness—topological protection, as well the non-Hermitian skin effect. In this work, we report realizations of hybrid higher-order skin-topological effect, in which effect selectively acts only topological modes, not bulk modes. Our experiments, are performed specially designed...

Metal halide perovskites are promising semiconductors for next-generation light-emitting diodes (LEDs) due to their high luminance, excellent color purity, and handily tunable band gap. However, it remains a great challenge develop perovskite LEDs (PeLEDs) with pure red emission at the wavelength of 630 nm. Herein, we report spectrally stable efficient PeLED by employing sequential ligand post-treated CsPbI3 quantum dots (QDs). The synthesized QDs size ∼5 nm treated in steps using ligands...

Non-Hermitian systems reveal rich physics beyond the Hermitian regime, and have aroused great interest. One remarkable physical phenomenon is non-Hermitian skin effect. Recently, topological switching for effect has been theoretically proposed in cold-atom systems. However, experimental realization of such a remains challenge. Here, we propose experimentally demonstrate switch electrical circuit networks. By controlling operational amplifier other electric components, nonreciprocal transport...

Lead halide perovskite nanocrystals (PNCs) are emerging as promising light emitters to be actively explored for high color purity and efficient light-emitting diodes. However, the most reported lead nanocrystal diodes (PNCLEDs) encountered issues of emission line width broadening operation voltage elevating caused by quantum confinement effect. Here, we report a new type PNCLED using large-size CsPbBr3 PNCs overly exceeding Bohr exciton diameter, achieving ultranarrow rapid brightness rise...

Lead halide perovskite nanocrystals (LHP NCs) are regarded as promising emitters for next-generation ultrahigh-definition displays due to their high color purity and wide gamut. Recently, the external quantum efficiency (EQE) of LHP NC based light-emitting diodes (PNC LEDs) has been rapidly improved a level required by practical applications. However, poor operational stability device, caused ion migration at grain boundary thin films, remains great challenge. Herein, we report resurfacing...

All-inorganic CsPbI3 perovskite is attractive for deep-red light-emitting diodes (LEDs) because of its excellent carrier mobility, high color purity, and solution processability. However, the phase transition energy barrier optically active black hinders fabrication efficient bright LEDs. Here, we report a novel α-BaF2 nanoparticle substrate-promoted solution-processable heteroepitaxial growth to overcome this hindrance obtain high-quality γ-CsPbI3 thin films, achieving We unravel that...

Non-Markovian evolution of an open quantum system can be induced by the memory effects a reservoir. Although reservoir with stronger may seem like it should cause non-Markovian on interest, this seemingly intuitive thinking not always correct. We illustrate investigating qubit (a two-level atom) that is coupled to hierarchical environment, which contains single-mode cavity and consisting infinite number modes. show how character influenced coupling strength between correlation time In...

Quantum walks (QWs) provide a powerful tool as quantum simulator to study and understand topological phases. Using such simulator, some phenomena have been discussed. However, all the experimental observations on in QWs restricted evolution one dimension (1D) so far. The existing 2D platforms cannot be applied due lack of full control position space. Thus, interesting QW that do not exist 1D case, e.g., edge-state-enhanced transport, demonstrated experimentally. Here we report realization...

Abstract Metal halide perovskite light‐emitting diodes (PeLEDs) are promising high‐definition display candidates due to their narrow emission bandwidth and wide color gamut. However, efficient stable pure‐red PeLEDs have rarely been achieved. Herein, a robust strongly‐coordinated sulfate anion passivation strategy is reported achieve spectrally PeLED with an electroluminescent peak at 630 nm full width half maximum of 27 nm. Octylammonium employed construct PbSO 4 layer on the surface CsPbI...

Abstract Exceptional points (EPs) are non‐Hermitian degeneracies or branch where eigenvalues and their corresponding eigenvectors coalesce. Due to the complex non‐trivial topology of Riemann surfaces associated with Hamiltonians, dynamical encirclement proximity EPs in parameter space has been shown lead topological mode conversions some novel physical phenomena. In fact, can also form continuous line geometries, which called exceptional lines (ELs). The problem is whether state transfer...

The robust operation of quantum entanglement states is crucial for applications in information, computing, and communications1-3. However, it has always been a great challenge to complete such task because decoherence disorder. Here, we propose theoretically demonstrate experimentally an effective scheme realize by designing quadruple degeneracy exceptional points. By encircling the points on two overlapping Riemann energy surfaces, have realized chiral switch entangled with high fidelity....

High-precision sensors are of fundamental importance in modern society and technology. Although numerous have been developed, obtaining with higher levels sensitivity stronger robustness has always expected. Here, we propose theoretically demonstrate experimentally an alternative class superior performances based on exotic properties high-order non-Hermitian topological physics. The frequency shift induced by perturbations for these can show exponential growth respect to the size device,...

Revealing new topological phases is of utmost importance in both Hermitian and non-Hermitian systems due to their potential applications. Generally, depend on the dimension system. Previous studies have shown that five-dimensional (5D) exhibit certain are not supported by lower-dimensional counterparts. Here, we investigate properties 5D discover phases, such as Yang monospheres, Fermi cylinder surfaces, arcs connecting two skin effect. The invariants characterizing these can be described...

With the rapid evolution of Internet-of-Things (IoT), billions IoT devices have connected to Internet, collecting information via tags and sensors. For an device, application code itself data collected by sensors can be great commercial value. It is challenging protect them because are prone compromise due inevitable vulnerabilities commodity OSes. Trusted Execution Environment (TEE) one solutions that protects sensitive running security-sensitive workloads in a secure world. However, this...

ABSTRACT Sensors are of fundamental importance and widely used in modern society, such as industry environmental monitoring, biomedical sample ingredient analysis wireless networks. Although numerous sensors have been developed, there is a continuous demand for with increased sensitivity, to detect signals that were previously undetectable. Recently, non-Hermitian degeneracies, also known exceptional points (EPs), attracted attention way improving the responsiveness sensors. In contrast...

Seismic coherence attributes are valuable for identifying structural features, but they often face challenges due to significant background noise and non-feature-related stratigraphic discontinuities. To address this, it is necessary apply attribute conditioning the enhance visibility of these structures. The primary challenge lies in finding a concise representation that isolates only true interpretive features while effectively removing interference. In this study, we choose sheet-like...

This paper reviews object detection methods for finding small objects from remote sensing imagery and provides an empirical evaluation of four state-of-the-art to gain insights into method performance technical challenges. In particular, we use car urban satellite images bee box agricultural lands as application scenarios. Drawing the existing surveys literature, identify several top-performing study. Public, high-resolution image datasets are used in our experiments.

Dissipation always exists in real environments, and it can cause decoherence during transfer of quantum states. To avoid decoherence, dissipation is usually shielded. However, difficult to cases. Thus, how achieve efficient state although will receive great attention, remains a challenge. Here we demonstrate that be utilized realize robust control instead being avoided. Our scheme realized by constructing Liouvillian exceptional point (LEP). By tuning dissipation, the exchange eigenvectors...

Let $\psi : \mathbb{R}_{>0}\rightarrow \mathbb{R}_{>0}$ be a non-increasing function. Denote by $W(\psi)$ the set of $\psi$-well-approximable points and $E(\psi)$ such that for any $0 < \epsilon 1$ there exist infinitely many $(p,q)\in\mathbb{Z}\times\mathbb{N} $ with $$\left(1-\epsilon\right)\psi(q)< \left| x-p/q\right|< \psi(q) .$$ In this paper, we investigate metric properties $E(\psi).$ Specifically, compute Hausdorff $\mathcal{H}^s$-measure large class numbers $s \in (0,1).$...

The impact of urban morphology characteristics on regional thermal environments is a crucial topic in planning and climate adaptation research. However, existing studies are often limited to single dimension fail fully reveal the spatiotemporal mechanisms multi-dimensional their connection policies. This study focuses Guangdong–Hong Kong–Macao Greater Bay Area (GBA), combining quantitative data from landscape pattern indices, land use expansion patterns, local zones (LCZs) derived 2000 2020....