Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Milne, Antony"'
Autor:
Milne, Antony
Graphical representations are invaluable for visualising physical systems and processes. In quantum information theory, the Bloch vector representation of a single qubit is ubiquitous, but visualising higher-dimensional quantum systems is far less st
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702833
We address the problem of quantum nonlocality with positive operator valued measures (POVM) in the context of Einstein-Podolsky-Rosen quantum steering. We show that, given a candidate for local hidden state (LHS) ensemble, the problem of determining
Externí odkaz:
http://arxiv.org/abs/1706.08166
Publikováno v:
Phys. Rev. A 96, 032109 (2017)
Both conservation laws and practical restrictions impose symmetry constraints on the dynamics of open quantum systems. In the case of time-translation symmetry, which arises naturally in many physically relevant scenarios, the quantum coherence betwe
Externí odkaz:
http://arxiv.org/abs/1703.01826
Publikováno v:
APL Photonics 2, 066103 (2017)
Photonic cluster states are a crucial resource for optical quantum computing. Recently a quantum dot single photon source has been demonstrated to produce strings of photons in a linear cluster state, but high photon loss rates make it impossible to
Externí odkaz:
http://arxiv.org/abs/1702.01958
Publikováno v:
Phys. Rev. A 94, 042105 (2016)
The quantum steering ellipsoid can be used to visualise two-qubit states, and thus provides a generalisation of the Bloch picture for the single qubit. Recently, a monogamy relation for the volumes of steering ellipsoids has been derived for pure 3-q
Externí odkaz:
http://arxiv.org/abs/1606.02390
Publikováno v:
Scientific Reports 6, 19365 (2016)
Lying at the heart of quantum mechanics, coherence has recently been studied as a key resource in quantum information theory. Quantum steering, a fundamental notion originally considered by Schr{\"o}dinger, has also recently received much attention.
Externí odkaz:
http://arxiv.org/abs/1507.02358
Publikováno v:
Phys. Rev. A 92, 012311 (2015)
Any two-qubit state can be represented geometrically by a steering ellipsoid inside the Bloch sphere. We extend this approach to represent any block positive two-qubit operator $B$. We derive a novel classification scheme based on the positivity of $
Externí odkaz:
http://arxiv.org/abs/1407.8440
Publikováno v:
Phys. Rev. A 90, 024302 (2014)
We investigate the entanglement, CHSH nonlocality, fully entangled fraction and symmetric extendibility of two-qubit states that have a single maximally mixed marginal. Within this set of states, the steering ellipsoid formalism has recently highligh
Externí odkaz:
http://arxiv.org/abs/1404.3951
Autor:
Milne, Antony
Publikováno v:
J. Geom. 106, 455-463 (2015)
We derive several results in classical Euclidean elementary geometry using the steering ellipsoid formalism from quantum mechanics. This gives a physically motivated derivation of very non-trivial geometric results, some of which are entirely new. We
Externí odkaz:
http://arxiv.org/abs/1404.0525