U. Schilling

Measuring arbitrary-order coherences: Tomography of single-mode multiphoton polarization-entangled states

A scheme is discussed for measuring Nth-order coherences of two orthogonally polarized light fields in a single spatial mode at very limited experimental cost. To implement the scheme, the only measurements needed are the Nth-order intensity moments after the light beam has passed through two quarter-wave plates, one half-wave plate, and a polarizing beam splitter for specific settings of the wave plates. It is shown that this method can be applied for arbitrarily large N. A set of explicit values is given for the settings of the wave plates, constituting an optimal measurement of the Nth-order coherences for any N. For Fock states the method introduced here corresponds to a full state tomography. Applications of the scheme to systems other than polarization optics are discussed.

Generation of total angular momentum eigenstates in remote qubits

We propose a scheme enabling the universal coupling of angular momentum of

Phase-dependent which-way information

N

Simulating the coupling of angular momenta in distant matter qubits

remote noninteracting qubits using linear optical tools only. Our system consists of

Versatile source of polarization-entangled photons

N

Generation of all symmetric as well as all total angular momentum eigenstates in photonic or matter qubits

single-photon emitters in a

Independent single photon emitters – a versatile source for the generation

\ensuremath{\Lambda}

Wave-particle duality revisited

configuration that are entangled among their long-lived ground-state qubits through suitably designed measurements of the emitted photons. In this manner, we present an experimentally feasible algorithm that is able to generate any of the

Heralded entanglement of arbitrary degree in remote atoms by detection of emitted photons

{2}^{N}

Generation of all Symmetric and all Total Angular Momentum Eigenstates in Remote Qubits

symmetric and nonsymmetric total angular momentum eigenstates spanning the Hilbert space of the