Weak Measurement-Based Entanglement Protection of Two-Qubit X-States from Amplitude Damping Decoherence
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-017-3290-1
Abstract: Considering X-states the density matrixes of which look like the letter X, we propose a weak measurement-based entanglement protection protocol of two-qubit X-states under local amplitude damping channels using weak measurement and reversal operation. It… read more here.
Keywords: weak measurement; amplitude damping; two qubit; qubit states ... See more keywords
X states of the same spectrum and entanglement as all two-qubit states
Sign Up to like & getrecommendations! Published in 2018 at "Quantum Information Processing"
DOI: 10.1007/s11128-018-2061-0
Abstract: We present an explicit family of two-qubit X states with entanglement-preserving unitary equivalence to the set of general states; that is, for any spectrum–entanglement combination achievable by general states, this family contains an X state… read more here.
Keywords: entanglement two; two qubit; qubit states; states spectrum ... See more keywords
Coherent control of $$^{171}\mathrm{Yb}^{+}$$ ion qubit states and thermometry using motional decoherence
Sign Up to like & getrecommendations! Published in 2021 at "Journal of the Korean Physical Society"
DOI: 10.1007/s40042-020-00050-6
Abstract: $$^{171} \mathrm{Yb}^{+}$$ ions were trapped in a quadrupole ion trap. A mode-locked pulse laser at 355 nm was used to generate a frequency comb to drive a Raman transition between the ground hyperfine qubit states… read more here.
Keywords: qubit states; ion qubit; geometry; ion ... See more keywords
Entanglement between charge qubit states and coherent states of nanomechanical resonator generated by ac Josephson effect
Sign Up to like & getrecommendations! Published in 2021 at "Low Temperature Physics"
DOI: 10.1063/10.0003739
Abstract: We considered a nanoelectromechanical system consisting of a movable Cooper-pair box qubit, which is subject to an electrostatic field, and coupled to the two bulk superconductors via tunneling processes. We suggest that qubit dynamics is… read more here.
Keywords: states coherent; entanglement charge; effect; qubit states ... See more keywords
Relating EPR steering with the fidelity of quantum teleportation for two- and three-qubit states
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/accabe
Abstract: Einstein–Podolsky–Rosen (EPR) steering is an important quantum resource in quantum information and computation. The relationships between EPR steering and the fidelity of quantum teleportation for two- and three-qubit states are investigated in this paper. For… read more here.
Keywords: qubit; epr steering; qubit states; teleportation ... See more keywords
Canonical steering ellipsoids of pure symmetric multiqubit states with two distinct spinors and volume monogamy of steering
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review A"
DOI: 10.1103/physreva.107.042207
Abstract: Quantum steering ellipsoid formalism provides a faithful representation of all two-qubit states and helps in obtaining correlation properties of the state through the steering ellipsoid. The steering ellipsoids corresponding to the two-qubit subsystems of permutation… read more here.
Keywords: qubit; qubit states; states two; canonical steering ... See more keywords
Geometric steering criterion for two-qubit states
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.97.012130
Abstract: According to the geometric characterization of measurement assemblages and local hidden state (LHS) models, we propose a steering criterion which is both necessary and sufficient for two-qubit states under arbitrary measurement sets. A quantity is… read more here.
Keywords: two qubit; qubit states; geometric steering; steering criterion ... See more keywords
Geometric local-hidden-state model for some two-qubit states
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.98.052345
Abstract: Adopting the geometric description of steering assemblages and local hidden states (LHS) model, we construct the optimal LHS model for some two-qubit states under continuous projective measurements, and obtain a sufficient steering criterion for all… read more here.
Keywords: two qubit; model two; qubit states; local hidden ... See more keywords
Robust self-testing of two-qubit states
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.99.052123
Abstract: It is well known that observing nonlocal correlations allows us to draw conclusions about the quantum systems under consideration. In some cases this yields a characterisation which is essentially complete, a phenomenon known as self-testing.… read more here.
Keywords: testing two; two qubit; qubit states; self testing ... See more keywords
Experimental Validation of Quantum Steering Ellipsoids and Tests of Volume Monogamy Relations.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.070402
Abstract: The set of all qubit states that can be steered to by measurements on a correlated qubit is predicted to form an ellipsoid-called the quantum steering ellipsoid-in the Bloch ball. This ellipsoid provides a simple… read more here.
Keywords: qubit states; monogamy relation; quantum; steering ellipsoids ... See more keywords
Measuring the Tangle of Three-Qubit States
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DOI: 10.3390/e22040436
Abstract: We present a quantum circuit that transforms an unknown three-qubit state into its canonical form, up to relative phases, given many copies of the original state. The circuit is made of three single-qubit parametrized quantum… read more here.
Keywords: tangle three; three qubit; qubit states; qubit ... See more keywords