We identify classical light fields as physical examples of nonquantum entanglement. A natural measure degree polarization emerges from this identification, and we discuss its systematic application to any optical field, whether beamlike or not.

The growing recognition that entanglement is not exclusively a quantum property, and does even originate with Schrödinger's famous remark about it [Proc. Camb. Phil. Soc. 31, 555 (1935)], prompts examination of its role in marking the quantum-classical boundary. We have done this by subjecting correlations classical optical fields to new Bell-analysis experiments, report here values Bell parameter greater than ${\cal B} = 2.54$. This many standard deviations outside limit 2$ established...

Ninety years ago in 1927, at an international congress Como, Italy, Niels Bohr gave address which is recognized as the first instance term "complementarity", a physical concept, was spoken publicly [1], revealing Bohr's own thinking about Louis de Broglie's "duality". had very slowly accepted duality principle of physics: close observation any quantum object will reveal either wave-like or particle-like behavior, one other two fundamental and complementary features. Little disagreement...

Quantum optics and classical are linked in ways that becoming apparent as a result of numerous recent detailed examinations the relationships elementary notions have with each other. These include interference, polarization, coherence, complementarity entanglement. All them present both quantum optics. They historic origins, at least partly for this reason not all quantitative definitions universally accepted. This makes further investigation into their engagement very desirable. We pay...

We have discovered a new domain of optical coherence, and show that it is the third last member previously unreported fundamental triad coherences. These are unified by our derivation parallel coherence constraints take form complementarity relations. been able to enter this experimentally we describe novel tomographic approach devised for purpose.

We provide the first experimental confirmation of a three-way quantum coherence identity possessed by single pure-state photons. Our results demonstrate that traditional wave-particle duality is specifically limited this identity. As new consequence, we show itself can be amplified, attenuated, or turned completely off. In Young double-slit context found to directly relevant, and it supplies rare quantitative backup for one Bohr's philosophical pronouncements.

We conduct a systematic analysis of cavity effects on the decay dynamics an open magnonic system. The Purcell effect magnon oscillator is thoroughly examined for both driven and non-driven scenarios. Analytical conditions are determined to distinguish between strong weak coupling regimes, corresponding oscillatory pure behaviors respectively. Additionally, our theory also predicts photon mode within cavity-magnonic system, demonstrating excellent agreement with existing experimental data....

Visibility $V$ and distinguishability $D$ quantify wave-ray duality: $V^2 + D^2 \le 1$. We join them to polarization $P$ via the Polarization Coherence Theorem, a tight equality: $P^2 = V^2 D^2$.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text Xiao-Feng Qian, A. Nick Vamivakas, and Joseph H. Eberly, "Emerging Connections: Classical Quantum Optics," Optics & Photonics News 28(10), 34-41 (2017) Export BibTex Endnote (RIS) HTML Plain alert Save article

Two-path interference is the dominant scenario of studying and testing quantum duality. It an equivalent process regenerating a single particle by two-center source. The authors show that intrinsic properties such source unexpectedly controls generated particle's wave-particle duality coherence through compact Pythagorean relation

While optics and mechanics are two distinct branches of physics, they connected. It is well known that the geometrical/ray treatment light has direct analogies to mechanical descriptions particle motion. However, connections between coherence wave classical rarely reported. Here we report links through a systematic quantitative analysis polarization entanglement, optical properties under description pioneered by Huygens Fresnel. A generic complementary identity relation obtained for...

We study the pairwise concurrences, a measure of entanglement, ground states for frustrated Heisenberg ring to explore relation between entanglement and quantum phase transition associated with momentum jump. The ground-state concurrences any two sites are obtained analytically numerically. It shows that summation all possible is an appropriate candidate depict transition. also investigate role takes in jump concurrence at critical points. find abrupt change results maximal difference...

The nonconservation of entanglement, when two or more particles interact, sets it apart from other dynamical quantities, like energy and momentum, does not allow the interpretation subtle dynamics entanglement as a flow this quantity between constituents system. Nevertheless, we show that interaction qubit its environment is described by an amplitude-decay channel, conservation mean excitation number inclusion third party leads to invariant expression involving bipartite each parties two. We...

We provide a graphical description of the entanglement pure-state multiparty systems based on an analogy between bipartite purity analysis and centroid collection point masses. This applies to quantum with $N$ parties, each arbitrary number (discrete) states. The case qubits is highlighted for simplicity. geometric illustrates some restrictions in form inequalities that apply systems.

We study the quantum-state transfer (QST) of a class tight-bonding Bloch electron systems with mirror symmetry by considering mode entanglement. Some rigorous results are obtained to reveal intrinsic relationship between fidelity QST and concurrence (MMC), which is defined measure entanglement certain spatial just overlap proper wave function its image. A complementarity discovered as maximum accompanied minimum MMC. At instant that half characteristic time required accomplish perfect QST,...

We introduce a quantification of genuine three-party pure-state coherence for wave fields, classical and quantum, by borrowing concepts from optics. The tensor structure paraxial light beam composed three principle degrees freedom is shown to be equivalent that three-qubit quantum state. traditional basis-independent optical quantity called degree polarization then determined the desired quantitative two-party measure. When appropriately generalized, set fundamental constraint relations...

The dynamics of arbitrary-order quantum correlations in a cavity magnon-polariton system are investigated based on the master equation coherent state representation. phenomena Rabi-like oscillation and level repulsion average cavity-photon number agree remarkably well with existing experimental observations. competing nature incoherent components these two cases is further revealed by second-order coherence photons magnons, which can be systematically tuned driving microwave thermal bath....

We prove a set of tight entanglement inequalities for arbitrary $N$-qubit pure states. By focusing on all bi-partite marginal entanglements between each single qubit and its remaining partners, we show that the provide an upper bound entanglement, while known monogamy relation establishes lower bound. The restrictions sharing properties associated with are further analyzed geometric polytope approach, examples three-qubit GHZ-class W-class entangled states presented to illustrate results.

Sub-diffraction-limit resolution, or superresolution, has been successfully demonstrated in recent theoretical and experimental studies for two equal-brightness incoherent point sources. However, practical situations of either nonequal brightness (i.e., unbalancedness) partial coherence are shown to have fatal effects on such superresolution. As a step towards resolving issues, we consider the both unbalancedness form quantum state coherence) together by including an entangled degree freedom...

Abstract We propose a multiple-range quantum communication channel to realize coherent two-way state transport with high fidelity. In our scheme, an information carrier (a qubit) and its remote partner are both adiabatically coupled the same data bus, i.e., N -site tight-binding chain that has single defect at center. At weak interaction regime, system is effectively equivalent three level of which superposition two states constitutes dark state. The adiabatic coupling allows well...

We discuss recent developments in measurement protocols that generate quantum entanglement between two remote qubits, focusing on the theory of joint continuous detection their spontaneous emission. consider a device geometry similar to used well-known Bell state measurements, which we analyze using conceptually transparent model stochastic trajectories; use this review photodetection, most straightforward case, and then generalize diffusive trajectories from homodyne heterodyne as well....

For many decades the word "entanglement" has been firmly attached to world of quantum mechanics. So is phrase "Bell violation". Here we show, without contradicting mechanics, that classical non-deterministic fields also provide a natural basis for entanglement and Bell analyses. Surprisingly, such are not eliminated by Clauser-Horne-Shimony-Holt violation test as viable alternatives theory. An experimental setup verification proposed.

For many decades the word "entanglement" has been firmly attached to world of quantum mechanics, as is phrase "Bell violation". Here we introduce Shimony-Wolf fields, entirely classical non-deterministic states, a basis for entanglement and Bell analyses. Such fields are well known in coherence optics open test. We present experimental results showing that states exhibit strong violation, effect opening way examining new sector boundary between physics.