Abstract Quantum random numbers distinguish themselves from others by their intrinsic unpredictability arising the principles of quantum mechanics. As such they are extremely useful in many scientific and real-world applications with considerable efforts going into realizations. Most demonstrations focus on high asymptotic generation rates. For this goal, a large number repeated trials required to accumulate significant store certifiable randomness, resulting latency between initial request...

Frequency translation of single photons while preserving their quantum characteristics is an important technology for flexible networking photonic communication systems. Here we demonstrate a scheme to interface different-color using optical sideband (OSSB) modulator. By changing the radio-frequency signal that drives modulators, can easily shift and precisely tune frequency photons. Using OSSB modulator, successfully erased distinguishability non-degenerated photon pairs obtain...

Multipartite entanglement is a critical resource in quantum information processing that exhibits much richer phenomenon and stronger correlations than bipartite systems. This advantage also reflected its multi-user applications. Although many demonstrations have used photonic polarization qubits, polarization-mode dispersion confines the transmission of qubits through an optical fiber. Consequently, time-bin particularly important role to play communication Here, we generate three-photon...

Quantum logic gates are important for quantum computation and information processing in numerous physical systems. Although time-bin qubits suitable communication over optical fiber, many essential them have not yet been realized. Here, we demonstrated a controlled-phase (C-Phase) gate that uses 2 × switch based on an electro-optic modulator. A Hong–Ou–Mandel interference measurement showed the could work as time-dependent beam splitter with variable splitting ratio. We confirmed two...

Abstract Quantum correlations between spatially separated parts of a d -dimensional bipartite system ( ≥ 2) have no classical analog. Such correlations, also called entanglements, are not only conceptually important, but profound impact on information science. In theory the violation Bell inequalities based local realistic theories for systems provides evidence quantum nonlocality. Experimental verification is required to confirm whether extremely large dimension can possess this feature,...

Polarization-entangled photon pairs have been widely used as a light source of quantum communication. The polarization-entangled are generally obtained at the crossing points cones that generated from type-II nonlinear crystal. However, it is hard to pick up coming out because their invisible wavelength and low intensity. In our previous work, we succeeded in generating by overlapping two paths for photon-pair generation. could be entangled all without clipping points, even with some...

Beamlike photon pairs were generated by spontaneous parametric down-conversion using a type-II $\ensuremath{\beta}$-BaB${}_{2}$O${}_{4}$ crystal. A pump laser when it transmitted through the crystal and was reflected back into mirror to generate more pairs. The first (first pairs) also overlap with light path of in second transmission (second pairs). We observed interference between modulated half period wavelength pairs, which demonstrates two-photon beamlike fringe confirms that is not...

Time-domain spectroscopy, which probes the dynamics of electronic states near Fermi surface that are associated with superconductivity, has proven to be a powerful method for providing insights into fundamental nature both pseudogap and superconducting gap. This study shows unique $T\text{\ensuremath{-}}x$ phase diagram time-evolving ultrafast ${\text{Y}}_{1\ensuremath{-}x}{\text{Pr}}_{x}{\text{Ba}}_{2}{\text{Cu}}_{3}{\text{O}}_{7\ensuremath{-}\ensuremath{\delta}}$ can used identify clearly...

The evolution of periodic ripples and dots on an Y Ba2Cu3O7 surface irradiated by single-beam dual-beam femtosecond laser pulses is investigated. density size the can be controlled number pulses. spatial period these does not show a close relation to pulse number. However, orientation geometrical are strongly dependent polarization incident angle pulses, respectively. formation processes also discussed based dependence.

We introduce our recent photonic quantum information processing experiments using the high-speed electro-optic modulator (EOM) based on a lithium niobate waveguides. First, we demonstrated frequency shifter for single photons by an optical sideband (OSSB) modulator, which is nested configuration of four phase modulators (PMs). By properly setting RF modulation signal and bias voltage to each PM, can suppress unwanted sidebands realize that tune with accuracy synthesizer. Using OSSB...

Time-bin qubits, where information is encoded in a single photon at different times, have been widely used optical-fiber- and waveguide-based quantum communications. With the recent developments distributed computation, it logical to ask whether time-bin qubits may be useful that context. We recently realized qubit controlled-phase (C-phase) gate using $2\ifmmode\times\else\texttimes\fi{}2$ optical switch based on lithium-niobate waveguide, with which we demonstrated generation of an...

Parametric down-conversion in a nonlinear crystal-generated photon pair which photons have orthogonal polarization. The was emitted cone shape for each polarization and collimated by lens to be doughnut shaped. doughnutlike runs collinear the pump laser. group delay walk-off between were compensated passing through half-wave plate crystal. Then, coupled into $1\ifmmode\times\else\texttimes\fi{}2$ fiber together with laser, i.e., intense laser used as guide alignment. After alignment...

Abstract Targeted nanoparticles have the potential to revolutionize therapeutics for medical applications. Here, we demonstrate utility of a flexible precision nanovesicle delivery system functional DNA, RNA, proteins and drugs into target cells. Nanovesicles generated by membrane sculpting protein caveolin, termed caveospheres, can be loaded with or post-synthesis incorporate genetically-encoded cargo during production without need purification. Functionalized fluorescently-labeled...

We study the interconnection among steering, uncertainty, and quantum correlation. The practical steering criteria for bipartite entanglement are proposed using multiple applications of Maassen-Uffink uncertainty relation. results show that distant causes less than in any local-hidden-variable theories. reduction entangled states leads to visibility mixed is also discussed. experimental on reported.

We demonstrate a simple scheme for generating certifiable quantum random numbers considering the imperfections in devices employed. Particularly, we show low-latency real-time randomness generation from measurements on photonic time-bin states. Every 0.12s, certify enough entropy against adversary to generate block of 8192 bits with certified error bounded by 10 -20 . It can be run continuously and is thus well suited as beacon.

A diffused germanium (Ge) p-n junction as a Ge-subcell was fabricated by using an overall Ge-based triple-junction structure to evaluate its photovoltaic properties. The key processes in the proposed include: (i) patterning contact window with 5% area of form top electrodes and (ii) semiconductor layers grown for InGaP cell (In)GaAs middle are remained atop Ge-subcell. Thus, our has duplicate absorption spectrum Ge bottom solar cell. Important parameters extracted showed that photo-generated...

Beamlike photon pairs were generated by SPDC using a type-II BBO crystal. The interference between the first and second of coincidence counts showed that beamlike have polarization entanglement.

This paper proposes a two-stage featureless hierarchical algorithm to alleviate the problems encountered in VideoOrbits (and other related) algorithms for estimation of projective coordinate transformation between images. Translation, rotation and zoom parameters are estimated by phase correlation methods first stage, which used as initial estimates Orbits second stage. In particular, hybrid devised use stage only when motion is large demonstrates most significant improvements efficiency...

In this work, we study the steering effect using Bell tests on quantum nonlocality. The results show that can reduce uncertainty than local hidden variable theory in tests.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text H. Lo, A. Yabushita, C. Luo, P. Chen, and T. Kobayashi, "Beamlike polarization entangled photon pairs generation by 2×2 fiber," in Research Optical Sciences, OSA Technical Digest (Optica Publishing Group, 2012), paper JT2A.25. Export BibTex Endnote (RIS) HTML Plain alert Save article

Polarization entangled photon pairs are generally obtained at crossing points of light cones. This work generated in beam shape and overlapped their paths to demonstrate two-photon interference polarization entanglement.

We demonstrate a flexible scheme for interfacing different-color photons in quantum communication systems using an optical single sideband (OSSB) modulator. Using the OSSB modulator, we successfully erased frequency distinguishability of non-degenerated photon pairs to obtain Hong-Ou-Mandel interference with visibility exceeding 90%.