Quantum correlations in a family of two-qubit separable classical-quantum correlated states are intensively studied with four different approaches, namely, quantum discord [Phys. Rev. Lett. 88 （2002） 017901], measur...Quantum correlations in a family of two-qubit separable classical-quantum correlated states are intensively studied with four different approaches, namely, quantum discord [Phys. Rev. Lett. 88 （2002） 017901], measurement- induced disturbance （MID） [Phys. Rev. A 77 （2008） 022301], ameliorated MID [J. Phys. A： Math. Theor. 44 （2011） 352002] and quantum dissonance [Phys. Rev. Left. 104 （2010） 080501]. Quantum correlations captured with different approaches are compared and discussed so that their three distinct features are exposed.展开更多
We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant par...We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant parties with only Gaussian operations and linear optics elements. Moreover, we analyse the logarithmic negativity of the entanglement shared between the two parties when the systems are imperfect and arrive at the conclusion that the logarithmic negativity is asymptotically stable with fluctuations within a certain space range.展开更多
We study the normal form of multipartite density matrices.It is shown that the correlation matrix(CM)separability criterion can be improved from the normal form we obtained under filtering transformations.Based on CMc...We study the normal form of multipartite density matrices.It is shown that the correlation matrix(CM)separability criterion can be improved from the normal form we obtained under filtering transformations.Based on CMcriterion the entanglement witness is further constructed in terms of local orthogonal observables for both bipartite andmultipartite systems.展开更多
The design of photosensitizers that can generate·OH from water as well as efficient charge separation(CS)is integral to the hypoxic tumor photodynamic therapy(PDT).However,such·OH photo-generators are scarce...The design of photosensitizers that can generate·OH from water as well as efficient charge separation(CS)is integral to the hypoxic tumor photodynamic therapy(PDT).However,such·OH photo-generators are scarcely reported,let alone those based on a simple D-π-A scaffold.Herein,we highlight the·OH photo-generators TPESPyCx@BSA based on a co-assembly strategy to initiate the photocatalysis of water oxidation into·OH as well as the efficient charge-separation for oxygen-independent PDT.The TPESPyCx@BSA were constructed by the co-assembly of a series of simple D-π-A scaffold tetraphenylpyridine salt TPESPyCx with BSA.The high-efficiency generation of·OH was confirmed by the EPR trapping technique,and the isotope tracing experiments revealed that the oxygen source of·OH generation originated exclusively from the H_(2)O.The calculated VB potential of TPESPyCx@BSA met the thermodynamic conditions of·OH produced by the oxidation of water.Deciphered by the transient absorbance spectra,the charge separation state was realized after the co-assembly,which guaranteed the electron transfer to generate·OH following the oxygen-independent pathway.TPESPyCx@BSA exhibited superb photocytotoxicity even under severe anoxic conditions and excellent antitumor efficacy on in vivo mouse models.This work provides a strategy for constructing oxygen-independent photodynamic agents,which opens up an avenue for effective PDT against hypoxic tumors.展开更多
A new concept of forming solid electrolyte interphases（SEI） in situ in an ionic conducting Li（1.5）Al（0.5）Ge（1.5）（PO4）3-polypropylene（LAGP-PP） based separator during charging and discharging is proposed and...A new concept of forming solid electrolyte interphases（SEI） in situ in an ionic conducting Li（1.5）Al（0.5）Ge（1.5）（PO4）3-polypropylene（LAGP-PP） based separator during charging and discharging is proposed and demonstrated. This unique structure shows a high ionic conductivity, low interface resistance with electrode, and can suppress the growth of lithium dendrite. The features of forming the SEI in situ are investigated by scanning electron microscopy（SEM） and x-ray photoelectron spectroscopy（XPS）. The results confirm that SEI films mainly consist of lithium fluoride and carbonates with various alkyl contents. The cell assembled by using the LAGP-coated separator demonstrates a good cycling performance even at high charging rates, and the lithium dendrites were not observed on the lithium metal electrode. Therefore, the SEI-LAGP-PP separator can be used as a promising flexible solid electrolyte for solid state lithium batteries.展开更多
For n≥3,we construct a class{Wn,π1,π2}of n^(2)×n^(2) hermitian matrices by the permutation pairs and show that,for a pair{π1,π2}of permutations on(1,2,…,n),Wn,π1,π2 is an entanglement witness of the n⊗n s...For n≥3,we construct a class{Wn,π1,π2}of n^(2)×n^(2) hermitian matrices by the permutation pairs and show that,for a pair{π1,π2}of permutations on(1,2,…,n),Wn,π1,π2 is an entanglement witness of the n⊗n system if{π1,π2}has the property(C).Recall that a pair{π1,π2}of permutations of(1,2,…,n)has the property(C)if,for each i,one can obtain a permutation of(1,…,i−1,i+1,…,n)from(π1(1),…,π1(i−1),π1(i+1),…,π1(n))and(π2(1),…,π2(i−1),π2(i+1),…,π2(n)).We further prove that Wn,π1,π2 is not comparable with Wn,π,which is the entanglement witness constructed from a single permutationπ;Wn,π1,π2 is decomposable ifπ1π2=id orπ21=π22=id.For the low dimensional cases n∈{3,4},we give a sufficient and necessary condition onπ1,π2 for Wn,π1,π2 to be an entanglement witness.We also show that,for n∈{3,4},Wn,π1,π2 is decomposable if and only ifπ1π2=id orπ21=π22=id;W3,π1,π2 is optimal if and only if(π1,π2)=(π,π2),whereπ=(2,3,1).As applications,some entanglement criteria for states and some decomposability criteria for positive maps are established.展开更多
We exactly evaluate the entanglement of a six vertex and a nine vertex graph states which correspond to non ＂two-colorable＂ graphs. The upper bound of entanglement for five vertex ring graph state is improved to 2.9...We exactly evaluate the entanglement of a six vertex and a nine vertex graph states which correspond to non ＂two-colorable＂ graphs. The upper bound of entanglement for five vertex ring graph state is improved to 2.9275, less than the upper bound determined by local operations and classical communication. An upper bound of entanglement is proposed based on the definition of graph state.展开更多
The pursuit of enhancing solar energy utilization efficiency has led to the continuous development of innovative materials and devices and especially exploring new mechanisms in artificial solar energy technologies.Tr...The pursuit of enhancing solar energy utilization efficiency has led to the continuous development of innovative materials and devices and especially exploring new mechanisms in artificial solar energy technologies.Traditional photosensitizing systems with a single-photon process usually suffer from the waste of low-energy photons of sunlight;in this context,a multiphoton strategy have been proposed by mimicking the photosynthesis process in nature in order to overcome this limitation.This review provides insights into various novel multiphoton strategies especially the consecutive photoinduced electron transfer process.The significance of the effective utilization of low-energy photons is emphasized,presenting a key pathway for improving energy conversion efficiency in various artificial techniques including photocatalysis,photoelectrodes,and solar cells.Furthermore,the long-time stable intermediate charge separation states are highlighted as an essential issue for the multiphotonstrategy. Finally, a perspective is given on the possibletransplantation of the multiphoton strategy fromsolution to solid-state devices in the future.展开更多
基金Supported by the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20103401110007the National Natural Science Foundation of China under Grant Nos.10874122,10975001,51072002,51272003+1 种基金the Program for Excellent Talents at the University of Guangdong,(Guangdong Teacher Letter[1010]No.79)the 211 Project of Anhui University
文摘Quantum correlations in a family of two-qubit separable classical-quantum correlated states are intensively studied with four different approaches, namely, quantum discord [Phys. Rev. Lett. 88 （2002） 017901], measurement- induced disturbance （MID） [Phys. Rev. A 77 （2008） 022301], ameliorated MID [J. Phys. A： Math. Theor. 44 （2011） 352002] and quantum dissonance [Phys. Rev. Left. 104 （2010） 080501]. Quantum correlations captured with different approaches are compared and discussed so that their three distinct features are exposed.
基金Project supported by the National Natural Science Foundation of China (Grant Nos.60873191,60903152,and 60821001)the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant Nos.200800131016 and 20090005110010)+1 种基金the Beijing Nova Program,China (Grant No.2008B51)the Key Program of Ministry of Education of China (Grant No.109014)
文摘We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant parties with only Gaussian operations and linear optics elements. Moreover, we analyse the logarithmic negativity of the entanglement shared between the two parties when the systems are imperfect and arrive at the conclusion that the logarithmic negativity is asymptotically stable with fluctuations within a certain space range.
基金National Natural Science Foundation of China under Grant Nos.10675086 and KM200510028022National Key Basic Research Program of China under Grant No.2004CB318000
文摘We study the normal form of multipartite density matrices.It is shown that the correlation matrix(CM)separability criterion can be improved from the normal form we obtained under filtering transformations.Based on CMcriterion the entanglement witness is further constructed in terms of local orthogonal observables for both bipartite andmultipartite systems.
基金the National Natural Science Foundation of China(52372073,22375003,22073001,22205004)the Anhui University Scientific Research Start-up Fund(S202418001/112)+1 种基金the University Annual Scientific Research Plan of Anhui Province(2023AH050064,2022AH010013)the Tongxin Science and Technology Innovation Project of Anhui Provincial Department of Science and Technology(202423a11020004)。
文摘The design of photosensitizers that can generate·OH from water as well as efficient charge separation(CS)is integral to the hypoxic tumor photodynamic therapy(PDT).However,such·OH photo-generators are scarcely reported,let alone those based on a simple D-π-A scaffold.Herein,we highlight the·OH photo-generators TPESPyCx@BSA based on a co-assembly strategy to initiate the photocatalysis of water oxidation into·OH as well as the efficient charge-separation for oxygen-independent PDT.The TPESPyCx@BSA were constructed by the co-assembly of a series of simple D-π-A scaffold tetraphenylpyridine salt TPESPyCx with BSA.The high-efficiency generation of·OH was confirmed by the EPR trapping technique,and the isotope tracing experiments revealed that the oxygen source of·OH generation originated exclusively from the H_(2)O.The calculated VB potential of TPESPyCx@BSA met the thermodynamic conditions of·OH produced by the oxidation of water.Deciphered by the transient absorbance spectra,the charge separation state was realized after the co-assembly,which guaranteed the electron transfer to generate·OH following the oxygen-independent pathway.TPESPyCx@BSA exhibited superb photocytotoxicity even under severe anoxic conditions and excellent antitumor efficacy on in vivo mouse models.This work provides a strategy for constructing oxygen-independent photodynamic agents,which opens up an avenue for effective PDT against hypoxic tumors.
基金Project supported by the Beijing Science and Technology ProjectChina(Grant No.Z13111000340000)+1 种基金the National Basic Research Program of China(Grant No.2012CB932900)the National Natural Science Foundation of China(Grant Nos.51325206 and 51421002)
文摘A new concept of forming solid electrolyte interphases（SEI） in situ in an ionic conducting Li（1.5）Al（0.5）Ge（1.5）（PO4）3-polypropylene（LAGP-PP） based separator during charging and discharging is proposed and demonstrated. This unique structure shows a high ionic conductivity, low interface resistance with electrode, and can suppress the growth of lithium dendrite. The features of forming the SEI in situ are investigated by scanning electron microscopy（SEM） and x-ray photoelectron spectroscopy（XPS）. The results confirm that SEI films mainly consist of lithium fluoride and carbonates with various alkyl contents. The cell assembled by using the LAGP-coated separator demonstrates a good cycling performance even at high charging rates, and the lithium dendrites were not observed on the lithium metal electrode. Therefore, the SEI-LAGP-PP separator can be used as a promising flexible solid electrolyte for solid state lithium batteries.
基金partially supported by National Natural Science Foundation of China(11671294,12071336)。
文摘For n≥3,we construct a class{Wn,π1,π2}of n^(2)×n^(2) hermitian matrices by the permutation pairs and show that,for a pair{π1,π2}of permutations on(1,2,…,n),Wn,π1,π2 is an entanglement witness of the n⊗n system if{π1,π2}has the property(C).Recall that a pair{π1,π2}of permutations of(1,2,…,n)has the property(C)if,for each i,one can obtain a permutation of(1,…,i−1,i+1,…,n)from(π1(1),…,π1(i−1),π1(i+1),…,π1(n))and(π2(1),…,π2(i−1),π2(i+1),…,π2(n)).We further prove that Wn,π1,π2 is not comparable with Wn,π,which is the entanglement witness constructed from a single permutationπ;Wn,π1,π2 is decomposable ifπ1π2=id orπ21=π22=id.For the low dimensional cases n∈{3,4},we give a sufficient and necessary condition onπ1,π2 for Wn,π1,π2 to be an entanglement witness.We also show that,for n∈{3,4},Wn,π1,π2 is decomposable if and only ifπ1π2=id orπ21=π22=id;W3,π1,π2 is optimal if and only if(π1,π2)=(π,π2),whereπ=(2,3,1).As applications,some entanglement criteria for states and some decomposability criteria for positive maps are established.
文摘We exactly evaluate the entanglement of a six vertex and a nine vertex graph states which correspond to non ＂two-colorable＂ graphs. The upper bound of entanglement for five vertex ring graph state is improved to 2.9275, less than the upper bound determined by local operations and classical communication. An upper bound of entanglement is proposed based on the definition of graph state.
基金supports from National Natural Science Foundation of China(grant nos.52103206 and 52373178)the Ministry of Science and Technology of China(grant no.2022YFA1204404)the Fund of the Key Laboratory of Luminescence from Molecular Aggregates of Guangdong Province(grant no.2023B1212060003).
文摘The pursuit of enhancing solar energy utilization efficiency has led to the continuous development of innovative materials and devices and especially exploring new mechanisms in artificial solar energy technologies.Traditional photosensitizing systems with a single-photon process usually suffer from the waste of low-energy photons of sunlight;in this context,a multiphoton strategy have been proposed by mimicking the photosynthesis process in nature in order to overcome this limitation.This review provides insights into various novel multiphoton strategies especially the consecutive photoinduced electron transfer process.The significance of the effective utilization of low-energy photons is emphasized,presenting a key pathway for improving energy conversion efficiency in various artificial techniques including photocatalysis,photoelectrodes,and solar cells.Furthermore,the long-time stable intermediate charge separation states are highlighted as an essential issue for the multiphotonstrategy. Finally, a perspective is given on the possibletransplantation of the multiphoton strategy fromsolution to solid-state devices in the future.
