A d-dimensional second-order topological insulator (SOTI) can host topologically protected (d-2)-dimensional gapless boundary modes. Here, we show that a 2D non-Hermitian SOTI zero-energy modes at its corners. In contrast to the Hermitian case, these be localized only one corner. 3D is shown support modes, which are not along hinges but anomalously The usual bulk-corner (hinge) correspondence in (3D) system breaks down. winding number (Chern number) based on complex wave vectors used...

By using transitionless quantum driving algorithm (TQDA), we present an efficient scheme for the shortcuts to holonomic computation (HQC). It works in decoherence-free subspace (DFS) and adiabatic process can be speeded up shortest possible time. More interestingly, give a physical implementation our HQC with nitrogen-vacancy centers diamonds dispersively coupled whispering-gallery mode microsphere cavity. efficiently realized by controlling appropriately frequencies of external laser...

Three-level quantum systems, which possess some unique characteristics beyond two-level ones, such as electromagnetically induced transparency, coherent trapping, and Raman scatting, play important roles in solid-state information processing. Here, we introduce an approach to implement the physically feasible three-level transitionless driving with multiple Schr\"{o}dinger dynamics (MSDs). It can be used control accurately population transfer entanglement generation for systems a...

Near-unity energy transfer efficiency has been widely observed in natural photosynthetic complexes. This phenomenon attracted broad interest from different fields, such as physics, biology, chemistry and material science, it may offer valuable insights into efficient solar-energy harvesting. Recently, quantum coherent effects have discovered light harvesting, their potential role on seen heated debate. Here, we perform an experimental simulation of using nuclear magnetic resonance (NMR). We...

In open quantum systems, the precision of metrology inevitably suffers from noise. Markovian dynamics, can not be improved by using entangled probes although measurement time is effectively shortened. However, it was predicted over one decade ago that in a non-Markovian one, error significantly reduced Zeno effect (QZE) [Chin, Huelga, and Plenio, Phys. Rev. Lett. 109, 233601 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.233601]. this work, we apply recently developed simulation approach to...

In this paper, we systematically study the spontaneous decay phenomenon of a two-level system under influences both its environment and continuous measurements. order to clarify some well-established conclusions about quantum Zeno effect (QZE) anti-Zeno (QAZE), do not use rotating wave approximation (RWA) in obtaining an effective Hamiltonian. We examine various spectral distributions by making our present approach comparison with other approaches. It is found that respect bare excited state...

We construct an error-detected block, assisted by the quantum-dot spins in double-sided optical microcavities. With this we propose three schemes for deterministic generation, complete analysis, and nondestructive analysis of hyperentangled Bell states both polarization spatial-mode degrees freedom two-photon systems. In these schemes, errors can be detected, which improve their fidelities largely, far different from other previous interaction between photon QD-cavity system. Our scheme...

Abstract In a fully-controllable experiment platform for studying non-Markovian open quantum dynamics, we show that the non-Markovianity could be investigated from global and local aspects. By mixing random unitary demonstrate Markovian dynamics. From point of view, by tuning base frequency transition Markovianity to as measured mutual information (QMI). process, QMI decays monotonically, while it may rise temporarily in process. However, under some circumstances, is not sufficient globally...

As the hyperentanglement of photon systems presents lots unique opportunities in high-capacity quantum networking, purification protocol (hyper-EPP) becomes a vital project work and quality its accomplishment attracts much attention recently. Here we present first theoretical scheme faithful hyper-EPP for nonlocal two-photon two degrees freedom (DOFs) by constructing several fidelity-robust circuits hyper-encoded photons. With this hyper-EPP, bit-flip errors both polarization spatial-mode...

Abstract Hyperentanglement, the entanglement in several degrees of freedom (DOFs) a quantum system, has attracted much attention as it can be used to increase both channel capacity communication and its security largely. Here, we present first scheme completely distinguish hyperentangled Bell states two-photon systems three DOFs with help cross-Kerr nonlinearity without destruction, including two longitudinal momentum polarization DOF. We use construct nondemolition detectors which make...

Two-dimensional electronic spectroscopy (2DES) has high spectral resolution and is a useful tool for studying atomic dynamics. In this paper, we show smallest unit of electromagnetically induced transparency (EIT) 2DES, i.e., three-level system. It found that the original main peak split into four small ones due to introduction EIT. suggests homogeneous broadening 2DES can be effectively reduced by Moreover, in sharp contrast constant height, height peaks will manifest damped oscillation...

The enhancement of weak signals and the detection hypothetical particles, facilitated by quantum amplification, are crucial for advancing fundamental physics its practical applications. Recently, it was experimentally observed that magnetic field can be amplified using nuclear spins under Markovian noise, [H. Su, et al., Phys. Rev. Lett. 133, 191801 (2024)]. Here, we theoretically propose amplifying magnetic-field signal Zeno effect (QZE). Under identical conditions, demonstrate compared to...

The radical-pair-based chemical reaction could be used by birds for the navigation via geomagnetic direction. An inherent physical mechanism is that quantum coherent transition from a singlet state to triplet states of radical pair response weak magnetic field and sensitive direction such then results in different photopigments avian eyes sensed. Here, we propose bionic setup ultra-sensitive probe based on phase environments two electrons pair. We prove yield products recombination...

With the local resonant interaction between a nitrogen-vacancy-center ensemble (NVE) and superconducting coplanar resonator, single-qubit operation, we propose two protocols for state transfer remote NVEs fast controlled-phase (cphase) gate on these NVEs, respectively. This hybrid quantum system is composed of distant coupled to separated high-$Q$ transmission line resonators (TLRs), which are interconnected by current-biased Josephson-junction phase qubit. The fidelity our state-transfer...

Adiabatic quantum control is a very important approach for physics and information processing (QIP). It holds the advantage with robustness to experimental imperfections but accumulates more decoherence due long evolution time. Here, we propose universal protocol fast robust in multimode interactions of system by using shortcuts adiabaticity. The results show this can speed up effectively, it also keep good while adiabatic processes cannot. We apply state transfer QIP photon-phonon an...

We show that nitrogen-vacancy (NV) centers in diamond can produce a novel quantum hyperbolic metamaterial. demonstrate dispersion relation with NV be engineered and dynamically tuned by applying magnetic field. This metamaterial tunable window for the negative refraction allows construction of superlens beyond diffraction limit. In addition to subwavelength imaging, this NV-metamaterial used spontaneous emission enhancement, heat transport acoustics, analogue cosmology, lifetime engineering....

Abstract We study the measurement-induced enhancement of spontaneous decay for a two-level subsystem, where measurements are treated as couplings between excited state and an auxiliary rather than von Neumann's wave function reduction. The photon radiated in fast atom, from to state, triggers quasi-measurement, opposed projection measurement. Our use term “quasi-measurement” refers “coupling-based measurement”. Such frequent quasi-measurements result exponential survival probability atomic...

We present a non-Markovian quantum jump (NMQJ) approach for simulating coherent energy transfer dynamics in molecular systems the presence of laser fields. By combining modified Redfield theory (CMRT) and NMQJ method, this new inherits broad-range validity from CMRT highly efficient propagation NMQJ. To implement CMRT, we show that master equation can be cast into generalized Lindblad form. Moreover, extend to treat time-dependent Hamiltonian, enabling description excitonic under As...

Elucidating quantum coherence effects and geometrical factors for efficient energy transfer in photosynthesis has the potential to uncover non-classical design principles advanced organic materials. We study a linear light-harvesting model reveal that dimerized geometries with strong electronic coherences within donor acceptor pairs exhibit significantly improved efficiency, which is marked contrast predictions of classical F\"orster theory. tuning due coherent delocalization...

We investigate the effects of random onsite disorder on higher-order Thouless pumping noninteracting fermionic Benalcazar--Bernevig--Hughes (BBH) model. The interplay disorder-induced topological phase transition and delocalization-localization is extensively explored. characterized by quantized corner-to-corner charge transport nonzero Chern number, analyzed utilizing both inverse participation ratio finite-size scaling. results show that broken for strong disorder, where instantaneous bulk...

L., a common traditional Chinese medicine (TCM) with centuries-old medicinal history, owned various parts like Mori folium, ramulus, cortex and fructus. Different medical exhibit distinct modern pharmacological effects. folium exhibited analgesic, anti-inflammatory, hypoglycemic action lipid-regulation ramulus anti-bacterial, anti-asthmatic diuretic activities. showed counteraction of pain, inflammatory, bacterial, platelet aggregation. fructus could decompose fat, lower blood lipids prevent...