Zobrazeno 1 - 10
of 211
pro vyhledávání: '"Wolf, M. M"'
Publikováno v:
J. Math. Phys. 57, 071902 (2016)
We show a fundamental limitation in the description of quantum many-body mixed states with tensor networks in purification form. Namely, we show that there exist mixed states which can be represented as a translationally invariant (TI) matrix product
Externí odkaz:
http://arxiv.org/abs/1512.05709
Publikováno v:
Phys. Rev. Lett. 110, 110501 (2013)
Dissipative engineering constitutes a framework within which quantum information processing protocols are powered by system-environment interaction rather than by unitary dynamics alone. This framework embraces noise as a resource, and consequently,
Externí odkaz:
http://arxiv.org/abs/1205.0985
Publikováno v:
J. Math. Phys. 51, 122201 (2010)
We introduce quantum versions of the $\chi^2$-divergence, provide a detailed analysis of their properties, and apply them in the investigation of mixing times of quantum Markov processes. An approach similar to the one presented in [1-3] for classica
Externí odkaz:
http://arxiv.org/abs/1005.2358
Autor:
Jensen, K., Wasilewski, W., Krauter, H., Fernholz, T., Nielsen, B. M., Serafini, A., Owari, M., Plenio, M. B., Wolf, M. M., Polzik, E. S.
Publikováno v:
Nature Physics. Volume: 7, Pages:13-16 (2011)
A quantum memory for light is a key element for the realization of future quantum information networks. Requirements for a good quantum memory are (i) versatility (allowing a wide range of inputs) and (ii) true quantum coherence (preserving quantum i
Externí odkaz:
http://arxiv.org/abs/1002.1920
Publikováno v:
Phys.Rev.Lett.104:170405,2010
In this letter we show that the field of Operator Space Theory provides a general and powerful mathematical framework for arbitrary Bell inequalities, in particular regarding the scaling of their violation within quantum mechanics. We illustrate the
Externí odkaz:
http://arxiv.org/abs/0912.1941
In this work we show that bipartite quantum states with local Hilbert space dimension n can violate a Bell inequality by a factor of order $\sqrt{n}$ (up to a logarithmic factor) when observables with n possible outcomes are used. A central tool in t
Externí odkaz:
http://arxiv.org/abs/0910.4228
Publikováno v:
IEEE Trans. Inf. Theory 56 (2010) 4668-4673
In this paper, Wielandt's inequality for classical channels is extended to quantum channels. That is, an upper bound to the number of times a channel must be applied, so that it maps any density operator to one with full rank, is found. Using this bo
Externí odkaz:
http://arxiv.org/abs/0909.5347
Publikováno v:
New J. Phys. 12 (2010) 025010. The title of the journal version is "Characterizing symmetries in a projected entangled pair state"
We show that two different tensors defining the same translational invariant injective Projected Entangled Pair State (PEPS) in a square lattice must be the same up to a trivial gauge freedom. This allows us to characterize the existence of any local
Externí odkaz:
http://arxiv.org/abs/0908.1674
Publikováno v:
Phys. Rev. A 79, 042308 (2009)
We characterize the conditions under which a translationally invariant matrix product state (MPS) is invariant under local transformations. This allows us to relate the symmetry group of a given state to the symmetry group of a simple tensor. We expl
Externí odkaz:
http://arxiv.org/abs/0901.2223
Publikováno v:
New J. Phys. 10, 113014, (2008)
We derive fidelity benchmarks for the quantum storage and teleportation of squeezed states of continuous variable systems, for input ensembles where the degree of squeezing $s$ is fixed, no information about its orientation in phase space is given, a
Externí odkaz:
http://arxiv.org/abs/0808.2260