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Foto (Matthias Groppe): Holographie-Apparatur von Herrn Dr. Andreas Redler

Photo: Foto (Matthias Groppe): Holographie-Apparatur von Herrn Dr. Andreas Redler

Publikationen


Open list in Research Information System

2023

Entanglement of particles versus entanglement of fields: Independent quantum resources

J. Sperling, E. Agudelo, Physical Review A (2023), 107(4), 042420

DOI


Detector entanglement: Quasidistributions for Bell-state measurements

J. Sperling, I. Gianani, M. Barbieri, E. Agudelo, Physical Review A (2023), 107(1), 012426

DOI


Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography

C. Lüders, M. Pukrop, F. Barkhausen, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, M. Aßmann, Physical Review Letters (2023), 130(11), 113601

DOI


2022

Two-Mode Photon-Number Correlations Created by Measurement-Induced Nonlinearity

T. Meier, J.P. Hoepker, M. Protte, C. Eigner, C. Silberhorn, P.R. Sharapova, J. Sperling, T. Bartley, in: Conference on Lasers and Electro-Optics: Applications and Technology, Optica Publishing Group, 2022, pp. JTu3A. 17

We demonstrate theoretically and experimentally complex correlations in the photon numbers of two-mode quantum states using measurement-induced nonlinearity. For this, we combine the interference of coherent states and single photons with photon sub-traction.


Driven Gaussian quantum walks

P. Held, M. Engelkemeier, S. De, S. Barkhofen, J. Sperling, C. Silberhorn, Physical Review A (2022), 105(4), 042210

DOI


Direct Measurement of Higher-Order Nonlinear Polarization Squeezing

N. Prasannan, J. Sperling, B. Brecht, C. Silberhorn, Physical Review Letters (2022), 129(26), 263601

DOI


2021

Quantum optical coherence: From linear to nonlinear interferometers

K.H. Luo, M. Santandrea, M. Stefszky, J. Sperling, M. Massaro, A. Ferreri, P. Sharapova, H. Herrmann, C. Silberhorn, Physical Review A (2021)

DOI


Quantifying Quantum Coherence in Polariton Condensates

C. Lüders, M. Pukrop, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, M. Aßmann, PRX Quantum (2021)

DOI


Probing the topological Anderson transition with quantum walks

D. Bagrets, K.W. Kim, S. Barkhofen, S. De, J. Sperling, C. Silberhorn, A. Altland, T. Micklitz, Physical Review Research (2021)

DOI


Transient subdiffusion via disordered quantum walks

A. Geraldi, S. De, A. Laneve, S. Barkhofen, J. Sperling, P. Mataloni, C. Silberhorn, Physical Review Research (2021)

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Statistical Benchmarking of Scalable Photonic Quantum Systems

J. Tiedau, M. Engelkemeier, B. Brecht, J. Sperling, C. Silberhorn, Physical Review Letters (2021), 126, 023601

DOI


Experimental entanglement characterization of two-rebit states

N. Prasannan, S. De, S. Barkhofen, B. Brecht, C. Silberhorn, J. Sperling, Physical Review A (2021), 103

DOI


Quantum Correlations beyond Entanglement and Discord

S. Köhnke, E. Agudelo, M. Schünemann, O. Schlettwein, W. Vogel, J. Sperling, B. Hage, Physical Review Letters (2021)

DOI


2020

Detector-Agnostic Phase-Space Distributions

J. Sperling, D. Phillips, J. Bulmer, G. Thekkadath, A. Eckstein, T. Wolterink, J. Lugani, S. Nam, A. Lita, T. Gerrits, W. Vogel, G. Agarwal, C. Silberhorn, I. Walmsley, Physical Review Letters (2020)

DOI


Quantum photonics with active feedback loops

M. Engelkemeier, L. Lorz, S. De, B. Brecht, I. Dhand, M.B. Plenio, C. Silberhorn, J. Sperling, Physical Review A (2020), 102, 023712

DOI


Local Versus Global Two-Photon Interference in Quantum Networks

T. Nitsche, S. De, S. Barkhofen, E. Meyer-Scott, J. Tiedau, J. Sperling, A. Gábris, I. Jex, C. Silberhorn, Physical Review Letters (2020)

DOI


Probing nonclassicality with matrices of phase-space distributions

M. Bohmann, E. Agudelo, J. Sperling, Quantum (2020), 343

<jats:p>We devise a method to certify nonclassical features via correlations of phase-space distributions by unifying the notions of quasiprobabilities and matrices of correlation functions. Our approach complements and extends recent results that were based on Chebyshev's integral inequality \cite{BA19}. The method developed here correlates arbitrary phase-space functions at arbitrary points in phase space, including multimode scenarios and higher-order correlations. Furthermore, our approach provides necessary and sufficient nonclassicality criteria, applies to phase-space functions beyond <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>s</mml:mi></mml:math>-parametrized ones, and is accessible in experiments. To demonstrate the power of our technique, the quantum characteristics of discrete- and continuous-variable, single- and multimode, as well as pure and mixed states are certified only employing second-order correlations and Husimi functions, which always resemble a classical probability distribution. Moreover, nonlinear generalizations of our approach are studied. Therefore, a versatile and broadly applicable framework is devised to uncover quantum properties in terms of matrices of phase-space distributions.</jats:p>


Classical evolution in quantum systems

J. Sperling, I.A. Walmsley, Physica Scripta (2020), 065101

DOI


2019

Quasiprobability distributions for quantum-optical coherence and beyond

J. Sperling, W. Vogel, Physica Scripta (2019), 034007

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Measuring coherence of quantum measurements

V. Cimini, I. Gianani, M. Sbroscia, J. Sperling, M. Barbieri, Physical Review Research (2019)

DOI


What can single photons do what lasers cannot do?

M. Rezai, J. Sperling, I. Gerhardt, Quantum Science and Technology (2019), 045008

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Benchmarking of Gaussian boson sampling using two-point correlators

D.S. Phillips, M. Walschaers, J.J. Renema, I.A. Walmsley, N. Treps, J. Sperling, Physical Review A (2019)

DOI


Mode-independent quantum entanglement for light

J. Sperling, A. Perez-Leija, K. Busch, C. Silberhorn, Physical Review A (2019)

DOI


Experimental Reconstruction of Entanglement Quasiprobabilities

J. Sperling, E. Meyer-Scott, S. Barkhofen, B. Brecht, C. Silberhorn, Physical Review Letters (2019)

DOI


2018

Quasistates and quasiprobabilities

J. Sperling, I.A. Walmsley, Physical Review A (2018)

DOI


Numerical Construction of Multipartite Entanglement Witnesses

S. Gerke, W. Vogel, J. Sperling, Physical Review X (2018)

DOI


Quasiprobability representation of quantum coherence

J. Sperling, I.A. Walmsley, Physical Review A (2018)

DOI


Geometrical picture of photocounting measurements

O.P. Kovalenko, J. Sperling, W. Vogel, A.A. Semenov, Physical Review A (2018)

DOI


Incomplete Detection of Nonclassical Phase-Space Distributions

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

DOI


2017

Separable and Inseparable Quantum Trajectories

J. Sperling, I. Walmsley, Physical Review Letters (2017)

DOI


High intensity click statistics from a 10 × 10 avalanche photodiode array

J. Kröger, T. Ahrens, J. Sperling, W. Vogel, H. Stolz, B. Hage, Journal of Physics B: Atomic, Molecular and Optical Physics (2017), 214003

DOI


Quantum coherences of indistinguishable particles

J. Sperling, A. Perez-Leija, K. Busch, I.A. Walmsley, Physical Review A (2017)

DOI


Conditional Hybrid Nonclassicality

E. Agudelo, J. Sperling, L. Costanzo, M. Bellini, A. Zavatta, W. Vogel, Physical Review Letters (2017)

DOI


Displaced photon-number entanglement tests

B. Kühn, W. Vogel, J. Sperling, Physical Review A (2017)

DOI


Entanglement verification of noisy NOON states

M. Bohmann, J. Sperling, W. Vogel, Physical Review A (2017)

DOI


Identification of nonclassical properties of light with multiplexing layouts

J. Sperling, A. Eckstein, W.R. Clements, M. Moore, J.J. Renema, W.S. Kolthammer, S.W. Nam, A. Lita, T. Gerrits, I.A. Walmsley, G.S. Agarwal, W. Vogel, Physical Review A (2017)

DOI


Entanglement in macroscopic systems

J. Sperling, I.A. Walmsley, Physical Review A (2017)

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Quantum correlations in composite systems

J. Sperling, E. Agudelo, I.A. Walmsley, W. Vogel, Journal of Physics B: Atomic, Molecular and Optical Physics (2017), 134003

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Time-dependent quantum correlations in phase space

F. Krumm, W. Vogel, J. Sperling, Physical Review A (2017)

DOI


Probing free-space quantum channels with laboratory-based experiments

M. Bohmann, R. Kruse, J. Sperling, C. Silberhorn, W. Vogel, Physical Review A (2017)

DOI


Quantifying nonclassicality by characteristic functions

S. Ryl, J. Sperling, W. Vogel, Physical Review A (2017)

DOI


Detector-Independent Verification of Quantum Light

J. Sperling, W. Clements, A. Eckstein, M. Moore, J. Renema, W. Kolthammer, S. Nam, A. Lita, T. Gerrits, W. Vogel, G. Agarwal, I. Walmsley, Physical Review Letters (2017)

DOI


Direct calibration of click-counting detectors

M. Bohmann, R. Kruse, J. Sperling, C. Silberhorn, W. Vogel, Physical Review A (2017)

DOI


Higher-order nonclassical effects in fluctuating-loss channels

M. Bohmann, J. Sperling, A.A. Semenov, W. Vogel, Physical Review A (2017)

DOI


Two-particle four-point correlations in dynamically disordered tight-binding networks

A. Perez-Leija, R.d.J. Leon-Montiel, J. Sperling, H. Moya-Cessa, A. Szameit, K. Busch, Journal of Physics B: Atomic, Molecular and Optical Physics (2017), 024002

DOI


2016

Multipartite Entanglement of a Two-Separable State

S. Gerke, J. Sperling, W. Vogel, Y. Cai, J. Roslund, N. Treps, C. Fabre, 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


Gaussian entanglement in the turbulent atmosphere

M. Bohmann, A.A. Semenov, J. Sperling, W. Vogel, Physical Review A (2016)

DOI


Operational definition of quantum correlations of light

J. Sperling, W. Vogel, G.S. Agarwal, Physical Review A (2016)

DOI


Characterizing maximally singular phase-space distributions

J. Sperling, Physical Review A (2016)

DOI


Multitime correlation functions in nonclassical stochastic processes

F. Krumm, J. Sperling, W. Vogel, Physical Review A (2016)

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Witnessing random unitary and projective quantum channels: Complementarity between separable and maximally entangled states

D. Bruns, J. Sperling, S. Scheel, Physical Review A (2016)

DOI


Harnessing click detectors for the genuine characterization of light states

R. Heilmann, J. Sperling, A. Perez-Leija, M. Gräfe, M. Heinrich, S. Nolte, W. Vogel, A. Szameit, Scientific Reports (2016)

DOI


2015

Homodyne detection with on-off detector systems

T. Lipfert, J. Sperling, W. Vogel, Physical Review A (2015)

DOI


Continuous sampling of the squeezed-state nonclassicality

E. Agudelo, J. Sperling, W. Vogel, S. Köhnke, M. Mraz, B. Hage, Physical Review A (2015)

DOI


Unified nonclassicality criteria

S. Ryl, J. Sperling, E. Agudelo, M. Mraz, S. Köhnke, B. Hage, W. Vogel, Physical Review A (2015)

DOI


Convex ordering and quantification of quantumness

J. Sperling, W. Vogel, Physica Scripta (2015), 074024

DOI


Entanglement and phase properties of noisy NOON states

M. Bohmann, J. Sperling, W. Vogel, Physical Review A (2015)

DOI


Entanglement witnesses for indistinguishable particles

A. Reusch, J. Sperling, W. Vogel, Physical Review A (2015)

DOI


Nonclassicality Phase-Space Functions: More Insight with Fewer Detectors

A. Luis, J. Sperling, W. Vogel, Physical Review Letters (2015)

DOI


Balanced homodyne detection with on-off detector systems: Observable nonclassicality criteria

J. Sperling, W. Vogel, G.S. Agarwal, EPL (Europhysics Letters) (2015), 34001

DOI


Full Multipartite Entanglement of Frequency-Comb Gaussian States

S. Gerke, J. Sperling, W. Vogel, Y. Cai, J. Roslund, N. Treps, C. Fabre, Physical Review Letters (2015)

DOI


Uncovering Quantum Correlations with Time-Multiplexed Click Detection

J. Sperling, M. Bohmann, W. Vogel, G. Harder, B. Brecht, V. Ansari, C. Silberhorn, Physical Review Letters (2015)

DOI


2014

Structural Quantification of Entanglement

F. Shahandeh, J. Sperling, W. Vogel, Physical Review Letters (2014)

DOI


Detection of nonlocal superpositions

A.J. Gutiérrez-Esparza, W.M. Pimenta, B. Marques, A.A. Matoso, J. Sperling, W. Vogel, S. Pádua, Physical Review A (2014)

DOI


Witnessing the degree of nonclassicality of light

M. Mraz, J. Sperling, W. Vogel, B. Hage, Physical Review A (2014)

DOI


Unified quantification of nonclassicality and entanglement

W. Vogel, J. Sperling, Physical Review A (2014)

DOI


Quantum state engineering by click counting

J. Sperling, W. Vogel, G.S. Agarwal, Physical Review A (2014)

DOI


Bipartite bound entanglement in continuous variables through degaussification

F.E.S. Steinhoff, M.C. de Oliveira, J. Sperling, W. Vogel, Physical Review A (2014)

DOI


Operational Gaussian Schmidt-number witnesses

F. Shahandeh, J. Sperling, W. Vogel, Physical Review A (2014)

DOI


2013

Correlation measurements with on-off detectors

J. Sperling, W. Vogel, G.S. Agarwal, Physical Review A (2013)

DOI


Multipartite entangled light from driven microcavities

D. Pagel, H. Fehske, J. Sperling, W. Vogel, Physical Review A (2013)

DOI


Multipartite Entanglement Witnesses

J. Sperling, W. Vogel, Physical Review Letters (2013)

DOI


Quasiprobabilities for multipartite quantum correlations of light

E. Agudelo, J. Sperling, W. Vogel, Physical Review A (2013)

DOI


2012

Quantification of nonclassicality

C. Gehrke, J. Sperling, W. Vogel, Physical Review A (2012)

DOI


Strongly entangled light from planar microcavities

D. Pagel, H. Fehske, J. Sperling, W. Vogel, Physical Review A (2012)

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Analytical progress on symmetric geometric discord: Measurement-based upper bounds

A. Miranowicz, P. Horodecki, R.W. Chhajlany, J. Tuziemski, J. Sperling, Physical Review A (2012)

DOI


Sub-Binomial Light

J. Sperling, W. Vogel, G.S. Agarwal, Physical Review Letters (2012)

DOI


Entanglement quasiprobabilities of squeezed light

J. Sperling, W. Vogel, New Journal of Physics (2012), 055026

DOI


True photocounting statistics of multiple on-off detectors

J. Sperling, W. Vogel, G.S. Agarwal, Physical Review A (2012)

DOI


2011

Determination of the Schmidt number

J. Sperling, W. Vogel, Physical Review A (2011)

DOI


The Schmidt number as a universal entanglement measure

J. Sperling, W. Vogel, Physica Scripta (2011), 045002

DOI


2010

Characterizing nonclassicality and entanglement

W. Vogel, T. Kiesel, J. Sperling, Optics and Spectroscopy (2010), pp. 197-205

DOI


2009

Verifying continuous-variable entanglement in finite spaces

J. Sperling, W. Vogel, Physical Review A (2009)

DOI


Representation of entanglement by negative quasiprobabilities

J. Sperling, W. Vogel, Physical Review A (2009)

DOI


Necessary and sufficient conditions for bipartite entanglement

J. Sperling, W. Vogel, Physical Review A (2009)

DOI


Open list in Research Information System

Head

Prof. Dr. Jan Sperling

Theoretical Quantum Science

Theoretical Quantum Science

Jan Sperling
Phone:
+49 5251 60-3360
Office:
O4.152
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