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Title:

1 Multi dimensional Photon Entanglement of Quantum States with Phase Singularities 1

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Entanglement contains one of the most interesting features of quantum mechanics, often named quantum non-locality[1]. This means entangled states are not separable regardless of the spatial separation of their components. Measurements on one particle of a two-particle entangled state define the state of the other particle instantaneously with ne...

Entanglement contains one of the most interesting features of quantum mechanics, often named quantum non-locality[1]. This means entangled states are not separable regardless of the spatial separation of their components. Measurements on one particle of a two-particle entangled state define the state of the other particle instantaneously with neither particle enjoying its own well-defined state before the measurement. So far experimental confirmation of entanglement has been restricted to qubits, i.e. two-state quantum systems including recent realization of three- [2, 3] and four-qubit [4, 5] entanglements. Yet, an ever increasing body of theoretical work calls for entanglement in quantum system of higher dimensions[6, 7]. Here we report the first realization3 of multi-dimensional entanglement exploiting the Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-12-05

Source:

http://arxiv.org/pdf/quant-ph/0104070v2.pdf

http://arxiv.org/pdf/quant-ph/0104070v2.pdf Minimize

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text

Language:

en

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

Metadata may be used without restrictions as long as the oai identifier remains attached to it. Minimize

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Title:

1 Entanglement of Orbital Angular

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Entanglement contains one of the most interesting features of quantum mechanics, often named quantum non-locality[1, 2]. This means entangled states are not separable regardless of the spatial separation of their components. Measurement results on one particle of a two-particle entangled state define the state of the other particle instantaneous...

Entanglement contains one of the most interesting features of quantum mechanics, often named quantum non-locality[1, 2]. This means entangled states are not separable regardless of the spatial separation of their components. Measurement results on one particle of a two-particle entangled state define the state of the other particle instantaneously with neither particle enjoying its own well-defined state before the measurement. So far experimental confirmation of entanglement has been restricted to qubits, i.e. two-state quantum systems including recent realization of three- [3, 4] and four-qubit [5, 6] entanglements. Yet, an ever increasing body of theoretical work calls for entanglement in quantum system of higher dimensions[7, 8]. For photons one is restricted to qubits as long as the entanglement is realized using the photons polarization. Here we report the first realization of entanglement exploiting the orbital angular momentum of photons Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-12-05

Source:

http://arxiv.org/pdf/quant-ph/0104070v3.pdf

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Document Type:

text

Language:

en

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

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Title:

Experimental quantum teleportation of a two-qubit composite system

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Quantum teleportation1, a way to transfer the state of a quantum system from one location to another, is central to quantum communication2 and plays an important role in a number of quantum computation protocols3–5. Previous experimental demonstrations have been implemented with single photonic6–11 or ionic qubits12,13. However, teleportation of...

Quantum teleportation1, a way to transfer the state of a quantum system from one location to another, is central to quantum communication2 and plays an important role in a number of quantum computation protocols3–5. Previous experimental demonstrations have been implemented with single photonic6–11 or ionic qubits12,13. However, teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation2–5. Here, we present the experimental realization of quantum teleportation of a twoqubit composite system. In the experiment, we develop and exploit a six-photon interferometer to teleport an arbitrary polarization state of two photons. The observed teleportation fidelities for different initial states are all well beyond the state estimation limit of 0.40 for a two-qubit system14. Not only does our six-photon interferometer provide an important step towards Minimize

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The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-01-25

Source:

http://www.hep.princeton.edu/%7Emcdonald/examples/QM/zhang_np_2_678_06.pdf

http://www.hep.princeton.edu/%7Emcdonald/examples/QM/zhang_np_2_678_06.pdf Minimize

Document Type:

text

Language:

en

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

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Title:

Ueber den wahren Gesichtspunkt die Pasquille zu beurtheilen

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Year of Publication:

1802-01-01

Document Type:

Digitalisat ; NonPeerReviewed

Subjects:

ddc:090

ddc:090 Minimize

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http://epub.ub.uni-muenchen.de/10839/1/8Misc.1592_11.pdf ; Mair, Alois: Ueber den wahren Gesichtspunkt die Pasquille zu beurtheilen. Oettingen: 1802

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Title:

COMPARISON OF CYANAMIDE AND PLACEBO IN THE TREATMENT OF ALCOHOL DEPENDENCE OF ADOLESCENTS

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— Aims: About 50% of alcoholic patients relapse within 3 months of treatment. Previous studies have suggested that cyanamide may help to prevent such relapse. The aim of our study was to assess the efficacy and safety of long-term cyanamide treatment in alcohol dependence of adolescents. Methods: In this, double-blind, placebo-controlled stu...

— Aims: About 50% of alcoholic patients relapse within 3 months of treatment. Previous studies have suggested that cyanamide may help to prevent such relapse. The aim of our study was to assess the efficacy and safety of long-term cyanamide treatment in alcohol dependence of adolescents. Methods: In this, double-blind, placebo-controlled study, we recruited 26 patients, aged 16–19 years, with chronic (frequent and regular) or episodic (frequent, but irregular) alcohol dependence. Patients were randomly allocated treatment with cyanamide (200 mg daily) or a placebo for 90 days. Patients were assessed on the day the treatment was started, and on days 30 and 90, by interview, self-report, questionnaire and laboratory screening. Patients were classified as abstinent, relapsing or non-attending. Time to first treatment failure (relapse or non-attendance) was the primary outcome measure. Results: The cyanamide ( n = 13) and placebo ( n = 13) groups were well matched in terms of baseline demographic and alcohol-related variables. Mean cumulative abstinence duration was significantly greater in the cyanamide group than in the placebo group. Apart from occasional diarrhoea, there was no difference in side effects between groups. Conclusions: Cyanamide seems to be an effective and well tolerated pharmacological adjunct to psychosocial and behavioural treatment programmes for the treatment of some adolescent alcohol-dependent patients. Because of reported hepatotoxic, haematological and dermatological side effects, patients should be observed continuously by experienced clinicians. Further studies are necessary to prove the efficacy of cyanamide in adolescents. Minimize

Publisher:

Oxford University Press

Year of Publication:

2003-01-01 00:00:00.0

Document Type:

TEXT

Language:

en

Subjects:

Human Studies

Human Studies Minimize

Rights:

Copyright (C) 2003, Medical Council on Alcohol

Copyright (C) 2003, Medical Council on Alcohol Minimize

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Title:

Entanglement of Orbital Angular Momentum States of Photons

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So far experimental confirmation of entanglement has been restricted to qubits, i.e. two-state quantum systems including recent realization of three- and four-qubit entanglements. Yet, an ever increasing body of theoretical work calls for entanglement in quantum system of higher dimensions. Here we report the first realization of multi-dimension...

So far experimental confirmation of entanglement has been restricted to qubits, i.e. two-state quantum systems including recent realization of three- and four-qubit entanglements. Yet, an ever increasing body of theoretical work calls for entanglement in quantum system of higher dimensions. Here we report the first realization of multi-dimensional entanglement exploiting the orbital angular momentum of photons, which are states of the electromagnetic field with phase singularities (doughnut modes). The properties of such states could be of importance for the efforts in the field of quantum computation and quantum communication. For example, quantum cryptography with higher alphabets could enable one to increase the information flux through the communication channels. ; Comment: 4 figures Minimize

Year of Publication:

2001-04-13

Document Type:

text

Subjects:

Quantum Physics

Quantum Physics Minimize

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Title:

Taxi vs. Taksi: On orthographic word recognition in the left ventral occipitotemporal cortex

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The importance of the left occipitotemporal cortex for visual word processing is highlighted by numerous functional neuroimaging studies, but the precise function of the Visual Word Form Area (VWFA) in this brain region is still under debate. The present fMRI study varied orthographic familiarity independent from phonological-semantic familiarit...

The importance of the left occipitotemporal cortex for visual word processing is highlighted by numerous functional neuroimaging studies, but the precise function of the Visual Word Form Area (VWFA) in this brain region is still under debate. The present fMRI study varied orthographic familiarity independent from phonological-semantic familiarity by presenting orthographically familiar and orthographically unfamiliar forms (pseudohomophones) of the same words in a phonological lexical decision task. Consistent with orthographic word recognition in the VWFA, we found lower activation for familiar compared to unfamiliar forms, but no difference between pseudohomophones and pseudowords. This orthographic familiarity effect in the VWFA differed from the phonological familiarity effect in left frontal regions, where phonologically unfamiliar pseudowords led to higher activation than phonologically familiar pseudohomophones. We suggest that the VWFA not only computes letter string representations but also hosts word specific orthographic representations. These representations function as recognition units with the effect that letter strings, which readily match with stored representations lead to less activation than letter strings which do not. Minimize

Year of Publication:

2007-10

Document Type:

Text

Language:

en

Subjects:

Article

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DDC:

150 Psychology *(computed)*

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Title:

Experimental realization of one-way quantum computing with two-photon four-qubit cluster states

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We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two qubits quan...

We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two qubits quantum gates. Our experiment demonstrates that such cluster states could serve as an ideal source and a building block for rapid and precise optical quantum computation. ; Comment: 4 pages, 3 figures Minimize

Year of Publication:

2007-05-01

Document Type:

text

Subjects:

Quantum Physics

Quantum Physics Minimize

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Title:

Experimental Quantum Teleportation of a Two-Qubit Composite System

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Quantum teleportation, a way to transfer the state of a quantum system from one location to another, is central to quantum communication and plays an important role in a number of quantum computation protocols. Previous experimental demonstrations have been implemented with photonic or ionic qubits. Very recently long-distance teleportation and ...

Quantum teleportation, a way to transfer the state of a quantum system from one location to another, is central to quantum communication and plays an important role in a number of quantum computation protocols. Previous experimental demonstrations have been implemented with photonic or ionic qubits. Very recently long-distance teleportation and open-destination teleportation have also been realized. Until now, previous experiments have only been able to teleport single qubits. However, since teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation2-5, teleportation of a composite system containing two or more qubits has been seen as a long-standing goal in quantum information science. Here, we present the experimental realization of quantum teleportation of a two-qubit composite system. In the experiment, we develop and exploit a six-photon interferometer to teleport an arbitrary polarization state of two photons. The observed teleportation fidelities for different initial states are all well beyond the state estimation limit of 0.40 for a two-qubit system. Not only does our six-photon interferometer provide an important step towards teleportation of a complex system, it will also enable future experimental investigations on a number of fundamental quantum communication and computation protocols such as multi-stage realization of quantum-relay, fault-tolerant quantum computation, universal quantum error-correction and one-way quantum computation. ; Comment: 16pages, 4 figures Minimize

Year of Publication:

2006-09-18

Document Type:

text

Subjects:

Quantum Physics

Quantum Physics Minimize

DDC:

190 Modern western philosophy *(computed)*

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Title:

Experimental realization of one-way quantum computing with two-photon four-qubit cluster states

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We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two-qubit quant...

We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two-qubit quantum gates. Our experiment demonstrates that such cluster states could serve as an ideal source and a building block for rapid and precise optical quantum computation. Minimize

Publisher:

電子物理系所

Contributors:

電子物理系所

Year of Publication:

2007-09-21

Document Type:

article

Language:

en-US

Subjects:

21

21 Minimize

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PHYSICAL REVIEW LETTERS 99(12): -

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