Results 81 to 90 of about 458,761 (298)
On Partially Trace Distance Preserving Maps and Reversible Quantum Channels
Journal of Applied Mathematics, 2013 We give a characterization of trace-preserving and positive linear maps preserving trace distance partially, that is, preservers of trace distance of quantum states or pure states rather than all matrices.
Long Jian, Kan He, Qing Yuan, Fei Wang
doaj +1 more source
The generalized inequalities via means and positive linear mappings
Sahand Communications in Mathematical Analysis, 2022 Summary: In this paper, we establish further improvements of the Young inequality and its reverse. Then, we assert operator versions corresponding them. Moreover, an application including positive linear mappings is given. For example, if \(A,B\in\mathbb{B}(\mathscr{H})\) are two invertible positive operators such that \(0 < m \leq A \leq m'< M' \leq B
Nasiri, Leila, Shams, Mehdi
openaire +3 more sources
Around Choi inequalities for positive linear maps
, 2011 We show an inequality for unital positive linear maps Φ interpolating Choi’s inequality (p=0) with a recent result of Bourin and Ricard (r=1):LetA∈A+,0⩽p⩽qandqq+p⩽r⩽2qq+p.Then|Φ(Ap)rΦ(Aq)r|⩽Φ(A(p+q)r)
Furuta, Takayuki, Takayuki Furuta
core +1 more source
Organoids in pediatric cancer research
FEBS Letters, EarlyView.Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley +1 more source
Reciprocal control of viral infection and phosphoinositide dynamics
FEBS Letters, EarlyView.Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley +1 more source
A new criterion and a special class of k-positive maps dedicated to Professor Leiba Rodman
, 2015 We study k-positive maps on operators. We obtain a new criterion on k-positivity in terms of the k-numerical range, and use it to improve and refine some earlier results on k-positive maps related to the study of quantum information science.
Poon, YT, Li, CK, Hou, J, Qi, X, Sze, NS
core +1 more source
FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source
Linear maps preserving products of positive or Hermitian matrices
, 2006 In this note we consider linear maps on the complex n×n matrix algebra Mn preserving products of either two positive matrices, a positive matrix and a Hermitian matrix, or two Hermitian matrices.
Ji, Guoxing, Fang, Li
core +1 more source
Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?
FEBS Letters, EarlyView.This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes +3 more
wiley +1 more source
There Are Many More Positive Maps Than Completely Positive Maps
, 2017 A $\ast$-linear map $\Phi$ between matrix spaces is positive if it maps positive semidefinite matrices to positive semidefinite ones, and is called completely positive if all its ampliations $I_n\otimes \Phi$ are positive.
Igor Klep +3 more
core +1 more source