2,320 research outputs found
Bell-CHSH function approach to quantum phase transitions in matrix product systems
Recently, nonlocality and Bell inequalities have been used to investigate
quantum phase transitions (QPTs) in low-dimensional quantum systems.
Nonlocality can be detected by the Bell-CHSH function (BCF). In this work, we
extend the study of BCF to the QPTs in matrix product systems (MPSs). In this
kind of QPTs, the ground-state energy keeps analytical in the vicinity of the
QPT points, and is usually called the MPS-QPTs. For several typical models, our
results show that BCF can signal the MPS-QPTs very well. In addition, we find
BCF can capture signal of QPTs in unentangled states and classical states, for
which other measures of quantum correlation (quantum entanglement and quantum
discord) fail. Furthermore, we find that in these MPSs, there exists some kind
of quantum correlation which cannot be characterized by entanglement, or by
nonlocality.Comment: 12 pages, 4 figure
Nonadiabatic holonomic quantum gates based on the surface electron
The nonadiabatic holonomic quantum computation based on the geometric phase
is robust against the built-in noise and decoherence. In this work, we
theoretically propose a scheme to realize nonadiabatic holonomic quantum gates
in a surface electron system, which is a promising two-dimensional platform for
quantum computation. The holonomic gate is realized by a three-level structure
that combines the Rydberg states and spin states via an inhomogeneous magnetic
field. After a cyclic evolution, the computation bases pick up different
geometric phases and thus perform a geometric gate. Only the electron with spin
up experiences the geometric gate, while the electron with spin down is
decoupled from the state-selective driving fields. The controlled-NOT gate
encoded on the Rydberg states and spin states is then put into practice. The
fidelity of the output state exceeds 0.99 with experimentally achievable
parameters
横纹肌溶解症患者整体护理
Objective: To discuss the overall care plan of patients with rhabdomyolysis. Methods: Combining retrospective investigation with evidence-based nursing method, care measures of patients with rhabdomyolysis in clinical practice were analyzed, and care results were evaluated timely. Results: 16 patients were discharged, among whom 15 patients’ exercise abilities were fully recovered. Conclusion: Carrying out overall care, standardize care processes and methods is very important for rehabilitation of patients with rhabdomyolysis.目的 探讨横纹肌溶解症患者的整体护理方案。方法 采取回顾性调查和循证护理相结合的方法,分析在临床实践中遇到的横纹肌溶解症患者及其需要采取的护理措施,落实整体护理,并及时评价护理效果。结果 16例患者均康复出院,除一例患者运动能力未康复外,其他患者均完全康复。结论 实施整体护理、规范护理流程和护理方法对横纹肌溶解症患者的顺利康复有重要意义
4-[3-(Chloromethyl)-1,2,4-oxadiazol-5-yl]pyridine. Corrigendum
Corrigendum to Acta Cryst. (2007), E63, o4654
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