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For the first time, researchers at MIT, Caltech, Harvard University, and elsewhere sent quantum information across a quantum system in what could be understood as traversing a wormhole. Though this ex...
Topology and entanglement are two powerful principles for characterizing the structure of complex quantum states. In a new paper in the journal Physical Review X, researchers from the University of Pe...
Entanglement-based quantum key distribution with biased basis choice via free space
Entanglement-based quantum key distribution iased basis choice via free space
2016/1/23
We report a free-space entanglement-based quantum key dis-tribution experiment, implementing the biased basis protocol between two sites which are 15.3 km apart. Photon pairs from a polarization-entan...
Experimental Observation of Entanglement Duality for Identical Particles
entanglement duality quantum indistinguishability quantum mechanics
2016/1/22
It was shown recently that entanglement of identical particles has a feature called dualism (Bose and Home 2013 Phys. Rev. Lett. 110 140404), which is funda-mentally connected with quantum indistingui...
Implementation of a Measurement-Device-Independent Entanglement Witness
Measurement-Device-Independent Entanglement Witness
2016/1/22
Entanglement, the essential resource in quantum information processing, should be witnessed in many tasks such as quantum computing and quantum communication. The conventional entanglement witness met...
Entanglement-free Certification of Entangling Gates
Entanglement-free Certification Entangling Gates
2016/1/22
Not all quantum protocols require entanglement to outperform their classical alternatives. The nonclassical correlations that lead to a quantum advantage are conjectured to be captured by quantum disc...
Quantum entanglement is an essential resource in quantum information processing,which needs to be verified in many tasks such as quantum cryptography and computation. Due to imperfect detection device...
One-step generation of multipartite entanglement among nitrogen-vacancy center ensembles
One-step generation multipartite entanglement nitrogen-vacancy center ensembles
2016/1/22
We describe a one-step, deterministic and scalable scheme for creating macroscopic arbitrary entangled coherent states (ECSs) of separate nitrogen-vacancy center ensembles (NVEs) that couple to a supe...
Characterizing entanglement of an artificial atom and a cavity cat state with Bell’s inequality
Characterizing entanglement cavity cat state Bell’s inequality
2016/1/22
The Schrodinger’s cat thought experiment highlights the counterintuitive concept of entan-glement in macroscopically distinguishable systems. The hallmark of entanglement is the detection of strong co...
Thinking Outside the Box: The Essence and Implications of Quantum Entanglement
spin mind pixel quantum entanglement interconnectedness inseparableness
2015/8/3
Many experiments have shown that quantum entanglement is physically real. In this paper, we will discuss its ontological origin, implications and applications by thinking outside the standard interpre...
The Existence of Quantum Entanglement Catalysts.
Entanglement catalysts entanglement states entanglement
2012/11/29
Without additional resources, it is often impossible to transform one entangled quantum state into another with local quantum operations and classical communication. Jonathan and Plenio (Phys. Rev. Le...
Disclosing the spatio-temporal structure of PDC entanglement through frequency up-conversion
spatio-temporal structure of PDC entanglement frequency up-conversion Optics
2012/5/29
In this work we propose and analyse a scheme where the full spatio-temporal correlation of twin photons/beams generated by parametric down-conversion is detected by using its inverse process, i.e. sum...
Time Resolved Collective Entanglement Dynamics in Cavity Quantum Electrodynamics
Time Resolved Collective Entanglement Dynamics Cavity Quantum Electrodynamics
2012/2/27
Nonlinearity and entanglement are two important indications by which physical systems can be identified as non-classical. We study the dynamics of the resonant interaction of up to N=3 two-level syste...
Over the past few years we have built an apparatus to demonstrate the entanglement of neutral Rb atoms at optically resolvable distances using the strong interactions between Rydberg atoms. Here we re...
Multipartite Quantum Entanglement Evolution in Photosynthetic Complexes
Multipartite Quantum Entanglement Evolution Photosynthetic Complexes
2012/2/28
We investigate the evolution of entanglement in the Fenna-Matthew-Olson (FMO) complex based on simulations using the scaled hierarchy equation of motion (HEOM) approach. We examine the role of multipa...