Quantum phase transition and chaos of anomalous Dicke model in the thermodynamic limit.

We study the anomalous Dicke model from two different perspectives including the quantum theory and semiclassical approximation method. Due to the competition between both bidirectional couplings in this appealing model, it exhibits three distinct phases, i.e.

Mediating role of health literacy in the relationship between social isolation and psychological distress among pre-frail older adults.

Background: Frailty has become a significant public health issue. The recent increase in the number of frail older adults has led to increased attention being paid to psychological care services in communities. The social isolation of pre-frail older adults can impact their psychological distress.

Realization of chiral two-mode Lipkin-Meshkov-Glick models via acoustics.

Theare mimicked in a potential hybrid quantum system, involving two ensembles of solid-state spins coupled to a pair of interconnected surface-acoustic-wave cavities. With the assistance of dichromatic classical optical drives featuring chiral designs, it can simulate two-mode LMG-type long-range spin-spin interactions with left-right asymmetry. For applications, this unconventional LMG model can not only engineer both ensembles of collective spins into two-mode spin-squeezed states but also simulate novel quantum critical phenomena and time crystal behaviors, among others.

Simulating the Dicke lattice model and quantum phase transitions using an array of coupled resonators.

A proposal for simulating the Dicke-Lattice model in a mechanics-controlled hybrid quantum system is studied here. An array of coupled mechanical resonators (MRs) can homogeneously interact with a group of trapped Bose-Einstein condensates (BECs) via the gradient magnetic field induced by the oscillating resonators. Assisted by the classical dichromatic radio-wave fields, each subsystem with the BEC-MR interaction can mimic the Dicke type spin-phonon interaction, and the whole system is therefore extended to a lattice of Dicke models with the additional adjacent phonon-phonon hopping couplings.

Sesquiterpenoids from the leaves of .

Two new sesquiterpenoids ( and ), one new natural product (), and two known compounds ( and ) were isolated from the leaves of . Their structures were elucidated by spectroscopic analysis, and the absolute configuration of compound was determined by the X-ray single-crystal diffraction analysis. The cytotoxicity of compounds was evaluated at three concentrations on two human breast cancer cell lines (MDA-MB-468 and MDA-MB-231) by MTT assay.

The efficacy of PD-1/PD-L1 inhibitors in advanced squamous-cell lung cancer: a meta-analysis of 3112 patients.

We performed a meta-analysis to explore the efficacy of immunotherapy for patients with squamous non-small-cell lung cancer (NSCLC). Randomized clinical trials comparing immunotherapy with chemotherapy for advanced NSCLC patients were included. A total of 11 trials (3112 patients) were included.