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J.-Prof. Dr. Tim Bartley

Kontakt
Publikationen
J.-Prof. Dr. Tim Bartley

Mesoskopische Quantenoptik

Leiter - Juniorprofessor

Integrierte Quantenoptik

Mitglied - Alumnus

Telefon:
+49 5251 60-5881
Büro:
P8.3.13
Besucher:
Pohlweg 47-49
33098 Paderborn

Liste im Research Information System öffnen

2020

Single-channel electronic readout of a multipixel superconducting nanowire single photon detector

J. Tiedau, T. Schapeler, V. Anant, H. Fedder, C. Silberhorn, T. Bartley, Optics Express (2020)

DOI


2019

Scalability of parametric down-conversion for generating higher-order Fock states

J. Tiedau, T. Bartley, G. Harder, A.E. Lita, S.W. Nam, T. Gerrits, C. Silberhorn, Physical Review A (2019)

DOI


A high dynamic range optical detector for measuring single photons and bright light

J. Tiedau, E. Meyer-Scott, T. Nitsche, S. Barkhofen, T. Bartley, C. Silberhorn, Optics Express (2019)

DOI


Integrated transition edge sensors on titanium in-diffused lithium niobate waveguides

J.P. Höpker, T. Gerrits, A. Lita, S. Krapick, H. Herrmann, R. Ricken, V. Quiring, R. Mirin, S.W. Nam, C. Silberhorn, T. Bartley, APL Photonics (2019)

DOI


2018

Heralded orthogonalisation of coherent states and their conversion to discrete-variable superpositions

R. Kruse, C. Silberhorn, T. Bartley, Quantum Measurements and Quantum Metrology (2018), 4(1)

<jats:title>Abstract</jats:title><jats:p>The nonorthogonality of coherent states is a fundamental property which prevents them from being perfectly and deterministically discriminated. Here, we present an experimentally feasible protocol for the probabilistic orthogonalisation of a pair of coherent states, independent of their amplitude and phase. In contrast to unambiguous state discrimination, a successful operation of our protocol is heralded without measuring the states. As such, they remain suitable for further manipulation and the obtained orthogonal states serve as a discretevariable basis. Therefore, our protocol doubles as a simple continuous-to-discrete variable converter, which may find application in hybrid continuous-discrete quantum information processing protocols.</jats:p>


Incomplete Detection of Nonclassical Phase-Space Distributions

M. Bohmann, J. Tiedau, T. Bartley, J. Sperling, C. Silberhorn, W. Vogel, Physical Review Letters (2018)

DOI


Compressive characterization of telecom photon pairs in the spatial and spectral degrees of freedom

N. Montaut, O.S. Magaña-Loaiza, T. Bartley, V.B. Verma, S.W. Nam, R.P. Mirin, C. Silberhorn, T. Gerrits, Optica (2018)

DOI


Quantum state and mode profile tomography by the overlap

J. Tiedau, V.S. Shchesnovich, D. Mogilevtsev, V. Ansari, G. Harder, T. Bartley, N. Korolkova, C. Silberhorn, New Journal of Physics (2018)

DOI


2017

Full statistical mode reconstruction of a light field via a photon-number-resolved measurement

I.A. Burenkov, A.K. Sharma, T. Gerrits, G. Harder, T. Bartley, C. Silberhorn, E.A. Goldschmidt, S.V. Polyakov, Physical Review A (2017)

DOI


Discorrelated quantum states

E. Meyer-Scott, J. Tiedau, G. Harder, L.K. Shalm, T. Bartley, Scientific Reports (2017), 7

DOI


Limits of the time-multiplexed photon-counting method

R. Kruse, J. Tiedau, T. Bartley, S. Barkhofen, C. Silberhorn, Physical Review A (2017)

DOI


Driven Boson Sampling

S. Barkhofen, T. Bartley, L. Sansoni, R. Kruse, C.S. Hamilton, I. Jex, C. Silberhorn, Physical Review Letters (2017)

DOI


Towards integrated superconducting detectors on lithium niobate waveguides

J.P. Höpker, M. Bartnick, E. Meyer-Scott, F. Thiele, T. Meier, T. Bartley, S. Krapick, N.M. Montaut, M. Santandrea, H. Herrmann, S. Lengeling, R. Ricken, V. Quiring, A.E. Lita, V.B. Verma, T. Gerrits, S.W. Nam, C. Silberhorn, in: Quantum Photonic Devices, 2017, pp. 1035809

DOI


Limits on the heralding efficiencies and spectral purities of spectrally filtered single photons from photon-pair sources

E. Meyer-Scott, N. Montaut, J. Tiedau, L. Sansoni, H. Herrmann, T. Bartley, C. Silberhorn, Physical Review A (2017)

DOI


Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

G. Harder, V. Ansari, T. Bartley, B. Brecht, C. Silberhorn, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (2017)

DOI


2016

Quantum enhanced estimation of optical detector efficiencies

M. Barbieri, A. Datta, T. Bartley, X. Jin, W.S. Kolthammer, I.A. Walmsley, Quantum Measurements and Quantum Metrology (2016)

<jats:title>Abstract</jats:title><jats:p>Quantum mechanics establishes the ultimate limit to the scaling of the precision on any parameter, by identifying optimal probe states and measurements. While this paradigm is, at least in principle, adequate for the metrology of quantum channels involving the estimation of phase and loss parameters, we show that estimating the loss parameters associated with a quantum channel and a realistic quantum detector are fundamentally different. While Fock states are provably optimal for the former, we identify a crossover in the nature of the optimal probe state for estimating detector imperfections as a function of the loss parameter using Fisher information as a benchmark. We provide theoretical results for on-off and homodyne detectors, the most widely used detectors in quantum photonics technologies, when using Fock states and coherent states as probes.</jats:p>


Quantum enhanced estimation of optical detector efficiencies

M. Barbieri, A. Datta, T. Bartley, X. Jin, W.S. Kolthammer, I.A. Walmsley, Quantum Measurements and Quantum Metrology (2016)

<jats:title>Abstract</jats:title><jats:p>Quantum mechanics establishes the ultimate limit to the scaling of the precision on any parameter, by identifying optimal probe states and measurements. While this paradigm is, at least in principle, adequate for the metrology of quantum channels involving the estimation of phase and loss parameters, we show that estimating the loss parameters associated with a quantum channel and a realistic quantum detector are fundamentally different. While Fock states are provably optimal for the former, we identify a crossover in the nature of the optimal probe state for estimating detector imperfections as a function of the loss parameter using Fisher information as a benchmark. We provide theoretical results for on-off and homodyne detectors, the most widely used detectors in quantum photonics technologies, when using Fock states and coherent states as probes.</jats:p>


Single-Mode Parametric-Down-Conversion States with 50 Photons as a Source for Mesoscopic Quantum Optics

G. Harder, T. Bartley, A.E. Lita, S.W. Nam, T. Gerrits, C. Silberhorn, Physical Review Letters (2016)

DOI


Quantum Correlations from the Conditional Statistics of Incomplete Data

J. Sperling, T. Bartley, G. Donati, M. Barbieri, X. Jin, A. Datta, W. Vogel, I. Walmsley, Physical Review Letters (2016)

DOI


2015

Directly comparing entanglement-enhancing non-Gaussian operations

T. Bartley, I.A. Walmsley, New Journal of Physics (2015)

DOI


2014

Observing optical coherence across Fock layers with weak-field homodyne detectors

G. Donati, T. Bartley, X. Jin, M. Vidrighin, A. Datta, M. Barbieri, I.A. Walmsley, Nature Communications (2014)

DOI


2013

Direct Observation of Sub-Binomial Light

T. Bartley, G. Donati, X. Jin, A. Datta, M. Barbieri, I.A. Walmsley, Physical Review Letters (2013)

DOI


Strategies for enhancing quantum entanglement by local photon subtraction

T. Bartley, P.J.D. Crowley, A. Datta, J. Nunn, L. Zhang, I. Walmsley, Physical Review A (2013)

DOI


Requirements for two-source entanglement concentration

M. Vidrighin, T. Bartley, G. Donati, X. Jin, M. Barbieri, W.S. Kolthammer, A. Datta, I.A. Walmsley, Quantum Measurements and Quantum Metrology (2013)

DOI


2012

Multiphoton state engineering by heralded interference between single photons and coherent states

T. Bartley, G. Donati, J.B. Spring, X. Jin, M. Barbieri, A. Datta, B.J. Smith, I.A. Walmsley, Physical Review A (2012)

DOI


2011

Continuous phase stabilization and active interferometer control using two modes

G. Jotzu, T. Bartley, H.B. Coldenstrodt-Ronge, B.J. Smith, I.A. Walmsley, Journal of Modern Optics (2011), pp. 42-45

DOI


2009

Feasibility of free space quantum key distribution with coherent polarization states

D. Elser, T. Bartley, B. Heim, C. Wittmann, D. Sych, G. Leuchs, New Journal of Physics (2009)(4), pp. 045014

We demonstrate for the first time the feasibility of free space quantum key distribution with continuous variables under real atmospheric conditions. More specifically, we transmit coherent polarization states over a 100 m free space channel on the roof of our institute's building. In our scheme, signal and local oscillator (LO) are combined in a single spatial mode, which auto-compensates atmospheric fluctuations and results in an excellent interference. Furthermore, the LO acts as a spatial and spectral filter, thus allowing unrestrained daylight operation.


Atmospheric channel characteristics for quantum communication with continuous polarization variables

B. Heim, D. Elser, T. Bartley, M. Sabuncu, C. Wittmann, D. Sych, C. Marquardt, G. Leuchs, Applied Physics B (2009), pp. 635-640

DOI


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