Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Vahid Karimipour"'
Autor:
Abbas Poshtvan, Vahid Karimipour
We study the four well-known capacities of a two-parameter family of qubit Pauli channels. These are the channels which are covariant under the SO(2) group and contain the depolarizing channel as a special case. We find exact expressions for the clas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8931c06980e765c7c60537ce7abb66fa
http://arxiv.org/abs/2206.06106
http://arxiv.org/abs/2206.06106
Publikováno v:
Quantum Information Processing. 20
Let two coordinate systems, in possession of Alice and Bob, be related to each other by an unknown rotation $R\in SO(3)$. Alice is to send identical states $|\psi_0\ra$ to Bob who will make measurements on the received state and will determine the ro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8ec1eb6253a7252fc7aeff5422f88a0
https://doi.org/10.1007/s11128-021-03243-5
https://doi.org/10.1007/s11128-021-03243-5
We introduce the concept of quasi-inverse of quantum and classical channels, prove general properties of these inverses and determine them for a large class of channels acting in an arbitrary finite dimension. Therefore we extend the previous results
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da59b50a98d588dd4a881ec9aabad372
Two qubit density matrices, which are of X-shape, are a natural generalization of Bell Diagonal States (BDSs) recently simulated on the IBM quantum device. We generalize the previous results and propose a quantum circuit for simulation of a general t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25783381cdfe1c28b39a88527bcc0116
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 55:235301
The problem of combating de-coherence by weak measurements has already been studied for the amplitude damping channel and for specific input states. We generalize this to a large four-parameter family of qubit channels and for the average fidelity ov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4557b45b5c650dbe1137b6513645db8
https://doi.org/10.1088/1751-8121/ac6c62
https://doi.org/10.1088/1751-8121/ac6c62
Autor:
Mehregan Doroudiani, Vahid Karimipour
We construct a large family of Planar Maximally Entangled (PME) states which are a wider class of multi-partite entangled states than Absolutely Maximally Entangled (AME) states. These are states in which any half of the qudits are in a maximally mix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8991c15c2bec1802fe98fc569a165b0
Quantum operations, or quantum channels cannot be inverted in general. An arbitrary state passing through a quantum channel looses its fidelity with the input. Given a quantum channel ${\cal E}$, we introduce the concept of its quasi-inverse as a map
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a659884b7a9a6cba61529eb15c5bf0f6
http://arxiv.org/abs/1909.06118
http://arxiv.org/abs/1909.06118
Publikováno v:
Physical Review A. 100
We show that a shared singlet state (SSS) can supersede a shared reference frame (SRF) in certain quantum communication tasks, i.e., tasks in which two remote players are required to estimate certain parameters of a two-particle state sent to them. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::695d3330c4b2c9ae53ec00fdc97a4d75
https://doi.org/10.1103/physreva.100.022329
https://doi.org/10.1103/physreva.100.022329
Autor:
Morteza Moradi, Vahid Karimipour
Publikováno v:
Physical Review A. 99
We design a quasi-one-dimensional spin chain with engineered coupling strengths such that the natural dynamics of the spin chain evolves a single excitation localized at the left-hand site to any specified single-particle state on the whole chain. Ou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c3701821c7a2739a6f3cc158c351c5c
https://doi.org/10.1103/physreva.99.052115
https://doi.org/10.1103/physreva.99.052115
Any quantum communication task requires a common reference frame (i.e. phase, coordinate system). In particular, Quantum Key Distribution requires different bases for preparation and measurements of states which are obviously based on the existence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c026a886669616b4c145f6d64526f4eb
http://arxiv.org/abs/1903.08279
http://arxiv.org/abs/1903.08279