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Showing 2011 · quant-phShow all

22 papers · 2 filters

quant-ph2011★ 262 cited

Bilocal versus non-bilocal correlations in entanglement swapping experiments

Cyril Branciard, Denis Rosset, Nicolas Gisin +1

Entanglement swapping is a process by which two initially independent quantum systems can become entangled and generate nonlocal correlations. To characterize such correlations, we…

quant-ph2011★ 219 cited

The definition of multipartite nonlocality

Jean-Daniel Bancal, Jonathan Barrett, Nicolas Gisin +1

In a multipartite setting, it is possible to distinguish quantum states that are genuinely -way entangled from those that are separable with respect to some bipartition. Similar…

quant-ph2011★ 74 cited

Majorization theory approach to the Gaussian channel minimum entropy conjecture

Raul Garcia-Patron, Carlos Navarrete-Benlloch, Seth Lloyd +2

A longstanding open problem in quantum information theory is to find the classical capacity of an optical communication link, modeled as a Gaussian bosonic channel. It has been con…

quant-ph2011★ 169 cited

Security of practical private randomness generation

Stefano Pironio, Serge Massar

Measurements on entangled quantum systems necessarily yield outcomes that are intrinsically unpredictable if they violate a Bell inequality. This property can be used to generate c…

quant-ph2011★ 3.7k cited

Gaussian Quantum Information

Christian Weedbrook, Stefano Pirandola, Raul Garcia-Patron +4

The science of quantum information has arisen over the last two decades centered on the manipulation of individual quanta of information, known as quantum bits or qubits. Quantum c…

quant-ph2011★ 152 cited

Quantum nonlocality based on finite-speed causal influences leads to superluminal signaling

Jean-Daniel Bancal, Stefano Pironio, Antonio Acin +3

The experimental violation of Bell inequalities using spacelike separated measurements precludes the explanation of quantum correlations through causal influences propagating at su…

quant-ph2011★ 10 cited

Exceptional points in bichromatic Wannier-Stark systems

C Elsen, K Rapedius, D Witthaut +1

The resonance spectrum of a tilted periodic quantum system for a bichromatic periodic potential is investigated. For such a bichromatic Wannier-Stark system exceptional points, deg…

quant-ph2011

Consistent assignment of quantum probabilities

Manas K. Patra, Ron van der Meyden

We pose and solve a problem concerning consistent assignment of quantum probabilities to a set of bases associated with maximal projective measurements. We show that our solution i…

quant-ph2011★ 326 cited

Randomness vs Non Locality and Entanglement

Antonio Acin, Serge Massar, Stefano Pironio

According to quantum theory, the outcomes obtained by measuring an entangled state necessarily exhibit some randomness if they violate a Bell inequality. In particular, a maximal v…

quant-ph2011★ 30 cited

Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Laurent Olislager, Ismaël Mbodji, Erik Woodhead +6

Frequency-entangled photons can be readily produced using parametric down-conversion. We have recently shown how such entanglement could be manipulated and measured using electro-o…

quant-ph2011★ 12 cited

Estimating Pre- and Post-Selected Ensembles

Serge Massar, Sandu Popescu

In analogy with the usual state estimation problem, we introduce the problem of state estimation for a pre- and post-selected ensemble. The problem has fundamental physical signifi…

quant-ph2011★ 10 cited

Quantum bit commitment under Gaussian constraints

A. Mandilara, N. J. Cerf

Quantum bit commitment has long been known to be impossible. Nevertheless, just as in the classical case, imposing certain constraints on the power of the parties may enable the co…

quant-ph2011★ 1 cited

A strong direct product theorem for quantum query complexity

Troy Lee, Jérémie Roland

We show that quantum query complexity satisfies a strong direct product theorem. This means that computing copies of a function with less than times the quantum queries nee…

quant-ph2011★ 27 cited

Quantum rejection sampling

Maris Ozols, Martin Roetteler, Jérémie Roland

Rejection sampling is a well-known method to sample from a target distribution, given the ability to sample from a given distribution. The method has been first formalized by von N…

quant-ph2011★ 29 cited

Optimal signal states for quantum detectors

Ognyan Oreshkov, John Calsamiglia, Ramon Munoz-Tapia +1

Quantum detectors provide information about quantum systems by establishing correlations between certain properties of those systems and a set of macroscopically distinct states of…

quant-ph2011★ 27 cited

Approximate simulation of quantum channels

Cédric Bény, Ognyan Oreshkov

In Ref. [1], we proved a duality between two optimizations problems. The primary one is, given two quantum channels M and N, to find a quantum channel R such that RN is optimally c…

quant-ph2011

Generation of correlated photons in hydrogenated amorphous-silicon waveguides

S. Clemmen, A. Perret, S. K. Selvaraja +5

We report the first (to our knowledge) observation of correlated photon emission in hydrogenated amorphous- silicon waveguides. We compare this to photon generation in crystalline…

quant-ph2011★ 19 cited

The monomial representations of the Clifford group

D. M. Appleby, Ingemar Bengtsson, Stephen Brierley +3

We show that the Clifford group - the normaliser of the Weyl-Heisenberg group - can be represented by monomial phase-permutation matrices if and only if the dimension is a square n…

quant-ph2011★ 263 cited

Device-independent witnesses of genuine multipartite entanglement

Jean-Daniel Bancal, Nicolas Gisin, Yeong-Cherng Liang +1

We consider the problem of determining whether genuine multipartite entanglement was produced in an experiment, without relying on a characterization of the systems observed or of…

quant-ph2011★ 50 cited

Fully Distrustful Quantum Cryptography

J. Silman, A. Chailloux, N. Aharon +3

In the distrustful quantum cryptography model the different parties have conflicting interests and do not trust one another. Nevertheless, they trust the quantum devices in their l…

quant-ph2011★ 4 cited

Transition Decomposition of Quantum Mechanical Evolution

Y. Strauss, J. Silman, S. Machnes +1

We show that the existence of the family of self-adjoint Lyapunov operators introduced in [J. Math. Phys. 51, 022104 (2010)] allows for the decomposition of the state of a quantum…

quant-ph2011★ 12 cited

Low power inelastic light scattering at small detunings in silicon wire waveguides at telecom wavelengths

S. Clemmen, A. Perret, J. Saffioui +5

When a pump beam is propagating through a silicon nanophotonic waveguide, a very small fraction of the light is scattered to other frequencies. At very low intensity, the amount of…