We show that under the influence of pure vacuum noise two entangled qubits become
completely disentangled in a finite-time, and in a specific example we find the time to be …

Graphene has many unique properties that make it an ideal material for fundamental
studies as well as for potential applications. Here we review recent results on the Raman …

Helpful elements: A facile bottom‐up method using citric acid and L‐cysteine as a precursor
has been developed to prepare graphene quantum dots (GQDs) co‐doped with nitrogen …

A new development in the dynamical behavior of elementary quantum systems is the surprising
discovery that correlation between two quantum units of information called qubits can be …

Background Since December, 2019, Wuhan, China, has experienced an outbreak of
coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome …

Transition‐metal disulfide with its layered structure is regarded as a kind of promising host
material for sodium insertion, and intensely investigated for sodium‐ion batteries. In this work, …

Background No therapeutics have yet been proven effective for the treatment of severe
illness caused by SARS-CoV-2. Methods We conducted a randomized, controlled, open-label …

Background An ongoing outbreak of pneumonia associated with the severe acute respiratory
coronavirus 2 (SARS-CoV-2) started in December, 2019, in Wuhan, China. Information …

Background In December, 2019, a pneumonia associated with the 2019 novel coronavirus (2019-nCoV)
emerged in Wuhan, China. We aimed to further clarify the epidemiological and …

Background A recent cluster of pneumonia cases in Wuhan, China, was caused by a novel
betacoronavirus, the 2019 novel coronavirus (2019-nCoV). We report the epidemiological, …