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Showing 2012 · quant-phShow all

43 papers · 2 filters

quant-ph2012★ 230 cited

Quantum simulation of open-system dynamical maps with trapped ions

P. Schindler, M. Müller, D. Nigg +7

Dynamical maps describe general transformations of the state of a physical system, and their iteration can be interpreted as generating a discrete time evolution. Prime examples in…

quant-ph2012★ 709 cited

Experimental Boson Sampling

Max Tillmann, Borivoje Dakić, René Heilmann +3

Universal quantum computers promise a dramatic speed-up over classical computers but a full-size realization remains challenging. However, intermediate quantum computational models…

quant-ph2012★ 148 cited

Real-Time Imaging of Quantum Entanglement

Robert Fickler, Mario Krenn, Radek Lapkiewicz +2

Quantum Entanglement is widely regarded as one of the most prominent features of quantum mechanics and quantum information science. Although, photonic entanglement is routinely stu…

quant-ph2012★ 83 cited

Highly efficient heralding of entangled single photons

Sven Ramelow, Alexandra Mech, Marissa Giustina +8

Single photons are an important prerequisite for a broad spectrum of quantum optical applications. We experimentally demonstrate a heralded single-photon source based on spontaneou…

quant-ph2012★ 68 cited

Quantum optics experiments to the International Space Station ISS: a proposal

Thomas Scheidl, Eric Wille, Rupert Ursin

We propose performing quantum optics experiments in an ground-to-space scenario using the International Space Station, which is equipped with a glass viewing window and a photograp…

quant-ph2012★ 22 cited

Undoing a quantum measurement

Philipp Schindler, Thomas Monz, Daniel Nigg +6

In general, a quantum measurement yields an undetermined answer and alters the system to be consistent with the measurement result. This process maps multiple initial states into a…

quant-ph2012★ 64 cited

Can different quantum state vectors correspond to the same physical state? An experimental test

Daniel Nigg, Thomas Monz, Philipp Schindler +7

A century on from the development of quantum theory, the interpretation of a quantum state is still discussed. If a physicist claims to have produced a system with a particular wav…

quant-ph2012★ 24 cited

Deterministic generation of arbitrary symmetric states and entanglement classes

L. Lamata, C. E. Lopez, B. P. Lanyon +3

We propose a method to generate arbitrary symmetric states of N qubits, which can be easily associated with their entanglement classes. It is particularly suited to quantum optics…

quant-ph2012★ 3 cited

A Classical Framework for Nonlocality and Entanglement

Gerhard Groessing, Siegfried Fussy, Johannes Mesa Pascasio +1

Based on our model of quantum systems as emerging from the coupled dynamics between oscillating "bouncers" and the space-filling zero-point field, a sub-quantum account of nonlocal…

quant-ph2012★ 180 cited

Single-photon nonlinearities in two-mode optomechanics

P. Kómár, S. D. Bennett, K. Stannigel +4

We present a detailed theoretical analysis of a weakly driven multimode optomechanical system, in which two optical modes are strongly and near-resonantly coupled to a single mecha…

quant-ph2012★ 21 cited

Experimental quantum teleportation over a high-loss free-space channel

Xiao-Song Ma, Sebastian Kropatschek, William Naylor +5

We present a high-fidelity quantum teleportation experiment over a high-loss free-space channel between two laboratories. We teleported six states of three mutually unbiased bases…

quant-ph2012★ 68 cited

Real-Vector-Space Quantum Theory with a Universal Quantum Bit

Antoniya Aleksandrova, Victoria Borish, William K. Wootters

We explore a model of the world based on real-vector-space quantum theory. In our model the familiar complex phase appearing in quantum states is replaced by a single binary object…

quant-ph2012★ 18 cited

Bound entanglement helps to reduce communication complexity

Michael Epping, Caslav Brukner

We present a simple communication complexity problem where three parties benefit from sharing bound entanglement. This demonstrates that entanglement distillability of the shared s…

quant-ph2012★ 37 cited

Attacks on quantum key distribution protocols that employ non-ITS authentication

Christoph Pacher, Aysajan Abidin, Thomas Lorünser +4

We demonstrate how adversaries with unbounded computing resources can break Quantum Key Distribution (QKD) protocols which employ a particular message authentication code suggested…

quant-ph2012★ 33 cited

Quantum control of spin-correlations in ultracold lattice gases

P. Hauke, R. J. Sewell, M. W. Mitchell +1

We demonstrate that it is possible to prepare a lattice gas of ultracold atoms with a desired non-classical spin-correlation function using atom-light interaction of the kind routi…

quant-ph2012★ 27 cited

Parallel execution of quantum gates in a long linear ion chain via Rydberg mode shaping

Weibin Li, Alexander W. Glaetzle, Rejish Nath +1

We present a mechanism that permits the parallel execution of multiple quantum gate operations within a single long linear ion chain. Our approach is based on large coherent forces…

quant-ph2012★ 100 cited

Impact of turbulence in long range quantum and classical communications

I. Capraro, A. Tomaello, A. Dall'Arche +4

The study of the free-space distribution of quantum correlations is necessary for any future application of quantum as classical communication aiming to connect two remote location…

quant-ph2012★ 96 cited

Atom-atom entanglement by single-photon detection

L. Slodička, G. Hétet, N. Röck +3

A scheme for entangling distant atoms is realized, as proposed in the seminal paper by Cabrillo et al. [Phys. Rev. A 59, 1025 (1999)]. The protocol is based on quantum interference…

quant-ph2012★ 197 cited

Condition for macroscopic realism beyond the Leggett-Garg inequalities

Johannes Kofler, Caslav Brukner

In 1985, Leggett and Garg put forward the concept of macroscopic realism (macrorealism) and, in analogy to Bell's theorem, derived a necessary condition in terms of inequalities, w…

quant-ph2012★ 868 cited

Quantum Entanglement of High Angular Momenta

Robert Fickler, Radek Lapkiewicz, William N. Plick +4

Single photons with helical phase structures may carry a quantized amount of orbital angular momentum (OAM) and their entanglement is important for quantum information science and…

quant-ph2012★ 297 cited

Hardware-efficient autonomous quantum error correction

Zaki Leghtas, Gerhard Kirchmair, Brian Vlastakis +3

We propose a new method to autonomously correct for errors of a logical qubit induced by energy relaxation. This scheme encodes the logical qubit as a multi-component superposition…

quant-ph2012★ 1 cited

Nonlocal appearance of a macroscopic angular momentum

G. S. Paraoanu, R. Healey

We discuss a type of measurement in which a macroscopically large angular momentum (spin) is "created" nonlocally by the measurement of just a few atoms from a double Fock state. T…

quant-ph2012★ 117 cited

Quantum erasure with causally disconnected choice

Xiao-song Ma, Johannes Kofler, Angie Qarry +9

The counterintuitive features of quantum physics challenge many common-sense assumptions. In an interferometric quantum eraser experiment, one can actively choose whether or not to…

quant-ph2012★ 100 cited

Reservoir engineering and dynamical phase transitions in optomechanical arrays

A. Tomadin, S. Diehl, M. D. Lukin +2

We study the driven-dissipative dynamics of photons interacting with an array of micromechanical membranes in an optical cavity. Periodic membrane driving and phonon creation resul…