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Showing 2011 · quant-phShow all

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quant-ph2011

Stabilizer States as a Basis for Density Matrices

Simon J. Gay

We show that the space of density matrices for n-qubit states, considered as a (2^n)^2 dimensional real vector space, has a basis consisting of density matrices of stabilizer state…

quant-ph2011★ 25 cited

Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems

F. M. Miatto, D. Giovannini, J. Romero +3

The measurement of high-dimensional entangled states of orbital angular momentum prepared by spontaneous parametric down-conversion can be considered in two separate stages: a gene…

quant-ph2011★ 934 cited

A gravitational wave observatory operating beyond the quantum shot-noise limit: Squeezed light in application

The LIGO Scientific Collaboration

Around the globe several observatories are seeking the first direct detection of gravitational waves (GWs). These waves are predicted by Einstein's General Theory of Relativity [Ei…

quant-ph2011★ 706 cited

Experimental high-dimensional two-photon entanglement and violations of generalised Bell inequalities

Adetunmise C. Dada, Jonathan Leach, Gerald S. Buller +2

Quantum entanglement plays a vital role in many quantum information and communication tasks. Entangled states of higher dimensional systems are of great interest due to the extende…

quant-ph2011★ 176 cited

Spin-orbit hybrid entanglement of photons and quantum contextuality

Ebrahim Karimi, Jonathan Leach, Sergei Slussarenko +7

We demonstrate electromagnetic quantum states of single photons and of correlated photon pairs exhibiting "hybrid" entanglement between spin and orbital angular momentum. These sta…