40.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.9k papers
- University of MichiganUS2k papers
- Institute for High Energy PhysicsES1.9k papers
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- University of BonnDE1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.8k papers
- Brookhaven National LaboratoryUS1.8k papers
- University of ArizonaUS1.8k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.8k papers
- Max Planck Institute for PhysicsDE1.8k papers
- Aix-Marseille UniversitéFR1.8k papers
18 papers · 2 filters
Optimal conversion of non--local unitary operations
W. Dür, G. Vidal, J. I. Cirac
We study when a non--local unitary operation acting on two --level systems can probabilistically simulate another one when arbitrary local operations and classical communication…
Seven Steps Towards the Classical World
Valia Allori, Detlef Dürr, Shelly Goldstein +1
Classical physics is about real objects, like apples falling from trees, whose motion is governed by Newtonian laws. In standard Quantum Mechanics only the wave function or the res…
Entanglement cost of mixed states
G. Vidal, W. Dür, J. I. Cirac
We compute the entanglement cost of several families of bipartite mixed states, including arbitrary mixtures of two Bell states. This is achieved by developing a technique that all…
Intensity-intensity correlations as a probe of interferences - under conditions of none in the intensity
G. S. Agarwal, J. von Zanthier, C. Skornia +1
The different behaviour of first order interferences and second order correlations are investigated for the case of two coherently excited atoms. For intensity measurements this pr…
A security proof of quantum cryptography based entirely on entanglement purification
Hans Aschauer, Hans J. Briegel
We give a proof that entanglement purification, even with noisy apparatus, is sufficient to disentangle an eavesdropper (Eve) from the communication channel. In the security regime…
The one-way quantum computer -- a non-network model of quantum computation
Robert Raussendorf, Daniel E. Browne, Hans J. Briegel
A one-way quantum computer works by only performing a sequence of one-qubit measurements on a particular entangled multi-qubit state, the cluster state. No non-local operations are…
Entanglement purification with noisy apparatus can be used to factor out an eavesdropper
Hans Aschauer, Hans J. Briegel
We give a proof that entanglement purification, even with noisy apparatus, is sufficient to disentangle an eavesdropper (Eve) from the communication channel. Our proof applies to a…
Multipartite bound entangled states that violate Bell's inequality
W. Dür
We study the relation between distillability of multipartite states and violation of Bell's inequality. We prove that there exist multipartite bound entangled states (i.e. non-sepa…
Trapped-Atom-Interferometer in a Magnetic Microtrap
W. Hänsel, J. Reichel, P. Hommelhoff +1
We propose a configuration of a magnetic microtrap which can be used as an interferometer for three-dimensionally trapped atoms. The interferometer is realized via a dynamic splitt…
Quantum Key Distribution using Multilevel Encoding: Security Analysis
Mohamed Bourennane, Anders Karlsson, Gunnar Bjork +2
We present security proofs for a protocol for Quantum Key Distribution (QKD) based on encoding in finite high-dimensional Hilbert spaces. This protocol is an extension of Bennett's…
Opposite Arrows of Time Can Reconcile Relativity and Nonlocality
Sheldon Goldstein, Roderich Tumulka
We present a quantum model for the motion of N point particles, implying nonlocal (i.e., superluminal) influences of external fields on the trajectories, that is nonetheless fully…
The breakdown flash of Silicon Avalance Photodiodes - backdoor for eavesdropper attacks?
Christian Kurtsiefer, Patrick Zarda, Sonja Mayer +1
Silicon avalanche photodiodes are the most sensitive photodetectors in the visible to near infrared region. However, when they are used for single photon detection in a Geiger mode…
Four Photon Entanglement from Down Conversion
Harald Weinfurter, Marek Zukowski
Double-pair emission from type-II parametric down conversion results in a highly entangled 4-photon state. Due to interference, which is similar to bunching from thermal emission,…
Monitoring the Dipole-Dipole Interaction via Quantum Jumps of Individual Atoms
C. Skornia, J. von Zanthier, G. S. Agarwal +2
The emission characteristics in the fluorescence of two laser-driven dipole-dipole-interacting three level atoms is investigated. When the light from both atoms is detected separat…
Nonclassical Interference Effects In The Radiation From Coherently Driven Uncorrelated Atoms
C. Skornia, J. von Zanthier, G. S. Agarwal +2
We demonstrate the existence of new nonclassical correlations in the radiation of two atoms, which are coherently driven by a continuous laser source. The photon-photon-correlation…
High efficiency entangled photon pair collection in type II parametric fluorescence
Christian Kurtsiefer, Markus Oberparleiter, Harald Weinfurter
We report on a method for optimizing the collection of entangled photon pairs in type-II parametric fluorescence. With this technique, we detected 360000 polarization-entangled pho…
Universal unitary gate for single-photon 2-qubit states
Berthold-Georg Englert, Christian Kurtsiefer, Harald Weinfurter
Upon entangling a spatial binary alternative of a photon with its polarization, one can use single photons to study arbitrary 2-qubit states. Sending the photon through a Mach-Zehn…
Secure communication with single-photon two-qubit states
Almut Beige, Berthold-Georg Englert, Christian Kurtsiefer +1
We propose a cryptographic scheme that is deterministic: Alice sends single photons to Bob, and each and every photon detected supplies one key bit -- no photon is wasted. This is…