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Sunny start to the new semester (April 2023). Show image information

Sunny start to the new semester (April 2023).

Photo: Paderborn University, Besim Mazhiqi

Prof. Dr. Jan Sperling

Contact
Profile
Biography
Publications
Prof. Dr. Jan Sperling

Theoretical Quantum Science

Professor - Theoretical Quantum Science

Phone:
+49 5251 60-3360
Office:
O4.152
Web:
Visitor:
Pohlweg 51
33098 Paderborn
Research Focus

quantum science, incl. quantum optics and quantum information theory

Teaching Focus

theoretical/mathematical physics

Prof. Dr. Jan Sperling
Science Career
Since 12/2021

Professor (W2)

Theoretical Physics, Paderborn University

2018 - 2021

Postdoc

Paderborn University, Germany

2016 - 2018

Postdoc

University of Oxford, UK

2008 - 2016

Postdoc

Universität Rostock, Germany

2015

Habilitation theoretical physics (DSc)

Universität Rostock, Germany

2013

Diploma mathematics (MSc)

Universität Rostock, Germany

2011

Doctorate theoretical physics (PhD)

Universität Rostock, Germany

2008

Diploma physics (MSc)

Universität Rostock, Germany

Recognitions
Since 2013

Recognitions

2020: "Outstanding Referee Award", American Physical Society, USA

2016: participation, "66th Lindau Nobel Laureate Meeting", Lindau, Germany

2013: "Joachim Jungius PhD Award", Gesellschaft der Förderer der Universität Rostock e.V., Germany
 

Scientific Engagement
Organization of Scientific Events
Since 2019

Selected Outreach Activities

2023: Digitale INFOTAGE Uni Paderborn, lecture for pupils "Quantenlogik"

2023: lecturer at jDPG Theory-Workshop, Büren-Wewelsburg, Germany

2022: podcast interview, "PaderPhy Episode 2: Wie klingt Quantenlicht?"

2020: interview, "50 Years of Physical Review A: The Legacy of Three Classics" (appeared as part of article: Physics 13, 24)

2019: local organizer, "Central European Workshop on Quantum Optics 2019", Paderborn, Germany

Since 2015

Selected Invited Talks

2022: "Many colors of entanglement", 13th KCIK-ICTQT Symposium on Quantum Information, Sopot, Poland

2019: "Towards a universal picture for quantum coherence", IQOQI, Universität Wien (host: E. Agudelo), Vienna, Austria

2019: "Entanglement characterization via nonlinear eigenvalue equations" University of Siegen (host: O. Gühne), Siegen, Germany

2018: "Verification of Quantum Coherence", University of Nottingham (host: Gerardo Adesso), Nottingham, UK

2017: "Entanglement in Highly Multipartite Systems", University of Leeds (host: A. Beige), Leeds, UK

2016: "Detection of Multipartite Entanglement", Imperial College London (host: M. Kim), London, UK

2015: "Verification of Quantum Phenomena by Click Counting", International Conference on Light Quanta: Modern Perspectives and Applications, Allahabad, India

Since 12/2021

Professor (W2)

Theoretical Physics, Paderborn University

Science Career
Since 2019

Selected Outreach Activities

2023: Digitale INFOTAGE Uni Paderborn, lecture for pupils "Quantenlogik"

2023: lecturer at jDPG Theory-Workshop, Büren-Wewelsburg, Germany

2022: podcast interview, "PaderPhy Episode 2: Wie klingt Quantenlicht?"

2020: interview, "50 Years of Physical Review A: The Legacy of Three Classics" (appeared as part of article: Physics 13, 24)

2019: local organizer, "Central European Workshop on Quantum Optics 2019", Paderborn, Germany

Organization of Scientific Events
Since 2015

Selected Invited Talks

2022: "Many colors of entanglement", 13th KCIK-ICTQT Symposium on Quantum Information, Sopot, Poland

2019: "Towards a universal picture for quantum coherence", IQOQI, Universität Wien (host: E. Agudelo), Vienna, Austria

2019: "Entanglement characterization via nonlinear eigenvalue equations" University of Siegen (host: O. Gühne), Siegen, Germany

2018: "Verification of Quantum Coherence", University of Nottingham (host: Gerardo Adesso), Nottingham, UK

2017: "Entanglement in Highly Multipartite Systems", University of Leeds (host: A. Beige), Leeds, UK

2016: "Detection of Multipartite Entanglement", Imperial College London (host: M. Kim), London, UK

2015: "Verification of Quantum Phenomena by Click Counting", International Conference on Light Quanta: Modern Perspectives and Applications, Allahabad, India

Organization of Scientific Events
Since 2013

Recognitions

2020: "Outstanding Referee Award", American Physical Society, USA

2016: participation, "66th Lindau Nobel Laureate Meeting", Lindau, Germany

2013: "Joachim Jungius PhD Award", Gesellschaft der Förderer der Universität Rostock e.V., Germany
 

Recognitions
2018 - 2021

Postdoc

Paderborn University, Germany

Science Career
2016 - 2018

Postdoc

University of Oxford, UK

Science Career
2008 - 2016

Postdoc

Universität Rostock, Germany

Science Career
2015

Habilitation theoretical physics (DSc)

Universität Rostock, Germany

Science Career
2013

Diploma mathematics (MSc)

Universität Rostock, Germany

Science Career
2011

Doctorate theoretical physics (PhD)

Universität Rostock, Germany

Science Career
2008

Diploma physics (MSc)

Universität Rostock, Germany

Science Career
Paper

J. Sperling and E. Agudelo
Entanglement of particles versus entanglement of fields: independent quantum resources
Phys. Rev. A 107, 042420 (2023).
https://doi.org/10.1103/PhysRevA.107.042420, arXiv:2204.06245

M. Santandrea, K.-H. Luo, M. Stefszky, J. Sperling, H. Herrmann, B. Brecht, and C. Silberhorn
Lossy SU(1,1) interferometers in the single-photon-pair regime
Quantum Sci. Technol. 8, 025020 (2023).
https://doi.org/10.1088/2058-9565/acc205, arXiv:2211.07992

C. Lüders, M. Pukrop, F. Barkhausen, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, and M. Aßmann
Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography
Phys. Rev. Lett. 130, 113601 (2023).
https://doi.org/10.1103/PhysRevLett.130.113601, arXiv:2209.07129

J. Sperling, I. Gianani, M. Barbieri, and E. Agudelo
Detector entanglement: Quasidistributions for Bell-state measurements
Phys. Rev. A 107, 012426 (2023).
https://doi.org/10.1103/PhysRevA.107.012426, arXiv:2209.06232

N. Prasannan, J. Sperling, B. Brecht, and C. Silberhorn
Direct Measurement of Higher-Order Nonlinear Polarization Squeezing
Phys. Rev. Lett. 129, 263601 (2022).
https://doi.org/10.1103/PhysRevLett.129.263601, arXiv:2204.07083

P. Held, M. Engelkemeier, S. De, S. Barkhofen, J. Sperling, and C. Silberhorn
Driven Gaussian quantum walks
Phys. Rev. A 105, 042210 (2022).
https://doi.org/10.1103/PhysRevA.105.042210, arXiv:2112.08981

K.-H. Luo, M. Santandrea, M. Stefszky, J. Sperling, M. Massaro, A. Ferreri, P. R. Sharapova, H. Herrmann, and C. Silberhorn
Quantum optical coherence: From linear to nonlinear interferometers
Phys. Rev. A 104, 043707 (2021).
https://doi.org/10.1103/PhysRevA.104.043707, arXiv:2104.02641

C. Lüders, M. Pukrop, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, and M. Aßmann
Quantifying quantum coherence in polariton condensates
PRX Quantum 2, 030320 (2021).
https://doi.org/10.1103/PRXQuantum.2.030320, arXiv:2103.03033

D. Bagrets, K. W. Kim, S. Barkhofen, S. De, J. Sperling, C. Silberhorn, A. Altland, and T. Micklitz
Probing the topological Anderson transition with quantum walks
Phys. Rev. Res. 3, 023183 (2021).
https://doi.org/10.1103/PhysRevResearch.3.023183, arXiv:2102.01176

S. Köhnke, E. Agudelo, M. Schünemann, O. Schlettwein, W. Vogel, J. Sperling, and B. Hage
Quantum Correlations beyond Entanglement and Discord
Phys. Rev. Lett. 126, 170404 (2021).
https://doi.org/10.1103/PhysRevLett.126.170404, arXiv:2010.03490

N. Prasannan, S. De, S. Barkhofen, B. Brecht, C. Silberhorn, and J. Sperling
Experimental entanglement characterization of two-rebit states
Phys. Rev. A 103, L040402 (2021).
https://doi.org/10.1103/PhysRevA.103.L040402, arXiv:2102.01450

A. Geraldi, S. De, A. Laneve, S. Barkhofen, J. Sperling, P. Mataloni, and C. Silberhorn
Transient subdiffusion via disordered quantum walks
Phys. Rev. Res. 3, 023052 (2021).
https://doi.org/10.1103/PhysRevResearch.3.023052, arXiv:2007.12526

J. Tiedau, M. Engelkemeier, B. Brecht, J. Sperling, and C. Silberhorn
Statistical Benchmarking of Scalable Photonic Quantum Systems
Phys. Rev. Lett. 126, 023601 (2021).
https://doi.org/10.1103/PhysRevLett.126.023601, arXiv:2008.11542

T. Nitsche, S. De, S. Barkhofen, E. Meyer-Scott, J. Tiedau, J. Sperling, A. Gábris, I. Jex, and C. Silberhorn
Local Versus Global Two-Photon Interference in Quantum Networks
Phys. Rev. Lett. 125, 213604 (2020).
https://doi.org/10.1103/PhysRevLett.125.213604, arXiv:2005.07219

M. Bohmann, E. Agudelo, and J. Sperling
Probing nonclassicality with matrices of phase-space distributions
Quantum 4, 343 (2020).
https://doi.org/10.22331/q-2020-10-15-343, arXiv:2003.11031

M. Engelkemeier, L. Lorz, S. De, B. Brecht, I. Dhand, M. B. Plenio, C. Silberhorn, and J. Sperling
Quantum photonics with active feedback loops
Phys. Rev. A 102, 023712 (2020).
https://doi.org/10.1103/PhysRevA.102.023712, arXiv:2002.08154

J. Sperling and I. A. Walmsley
Classical evolution in quantum systems
Phys. Scr. 95, 065101 (2020).
https://doi.org/10.1088/1402-4896/ab833b, arXiv:1802.02807

J. Sperling and W. Vogel
Quasiprobability distributions for quantum-optical coherence and beyond
Phys. Scr. 95, 034007 (2020).
https://doi.org/10.1088/1402-4896/ab5501, arXiv:1907.12427

J. Sperling, D. S. Phillips, J. F. F. Bulmer, G. S. Thekkadath, A. Eckstein, T. A. W. Wolterink, J. Lugani, S. W. Nam, A. Lita, T. Gerrits, W. Vogel, G. S. Agarwal, C. Silberhorn, and I. A. Walmsley
Detector-Agnostic Phase-Space Distributions
Phys. Rev. Lett. 124, 013605 (2020).
https://doi.org/10.1103/PhysRevLett.124.013605, arXiv:1904.10893

J. Sperling, A. Perez-Leija, K. Busch, and C. Silberhorn
Mode-independent quantum entanglement for light
Phys. Rev. A 100, 062129 (2019).
https://doi.org/10.1103/PhysRevA.100.062129, arXiv:1910.02731

V. Cimini, I. Gianani, M. Sbroscia, J. Sperling, and M. Barbieri
Measuring coherence of quantum measurements
Phys. Rev. Res. 1, 033020 (2019).
https://doi.org/10.1103/PhysRevResearch.1.033020, arXiv:1903.01173

M. Rezai, J. Sperling, and I. Gerhardt
What can single photons do what lasers cannot do?
Quantum Sci. Technol. 4, 045008 (2019).
https://doi.org/10.1088/2058-9565/ab3d56

D. S. Phillips, M. Walschaers, J. J. Renema, I. A. Walmsley, N. Treps, and J. Sperling
Benchmarking of Gaussian boson sampling using two-point correlators
Phys. Rev. A 99, 023836 (2019).
https://doi.org/10.1103/PhysRevA.99.023836, arXiv:1807.11294

J. Sperling, E. Meyer-Scott, S. Barkhofen, B. Brecht, and C. Silberhorn
Experimental Reconstruction of Entanglement Quasiprobabilities
Phys. Rev. Lett. 122, 053602 (2019).
https://doi.org/10.1103/PhysRevLett.122.053602, arXiv:1810.07040

J. Sperling and I. A. Walmsley
Quasistates and quasiprobabilities
Phys. Rev. A 98, 042122 (2018).
https://doi.org/10.1103/PhysRevA.98.042122, arXiv:1808.08471

S. Gerke, W. Vogel, and J. Sperling
Numerical Construction of Multipartite Entanglement Witnesses
Phys. Rev. X 8, 031047 (2018).
https://doi.org/10.1103/PhysRevX.8.031047, arXiv:1801.08371

J. Sperling and I. A. Walmsley
Quasiprobability representation of quantum coherence
Phys. Rev. A 97, 062327 (2018).
https://doi.org/10.1103/PhysRevA.97.062327, arXiv:1803.04747

O. P. Kovalenko, J. Sperling, W. Vogel, and A. A. Semenov
Geometrical picture of photocounting measurements
Phys. Rev. A 97, 023845 (2018).
https://doi.org/10.1103/PhysRevA.97.023845, arXiv:1801.02677

M. Bohmann, J. Tiedau, T. Bartley, J. Sperling, C. Silberhorn, and W. Vogel
Incomplete Detection of Nonclassical Phase-Space Distributions
Phys. Rev. Lett. 120, 063607 (2018).
https://doi.org/10.1103/PhysRevLett.120.063607, arXiv:1711.10962

A. Perez-Leija, R. Leon-Montiel, J. Sperling, H. Moya-Cessa, A. Szameit, and K. Busch
Two-particle four-point correlations in dynamically disordered tight-binding networks
J. Phys. B: At. Mol. Opt. Phys. 51, 024002 (2018).
https://doi.org/10.1088/1361-6455/aa9aa1, arXiv:1706.09289

J. Sperling and I. A. Walmsley
Separable and Inseparable Quantum Trajectories
Phys. Rev. Lett. 119, 170401 (2017).
https://doi.org/10.1103/PhysRevLett.119.170401, arXiv:1708.04421

J. Kröger, T. Ahrens, J. Sperling, W. Vogel, H. Stolz, and B. Hage
High intensity click statistics from a 10 × 10 avalanche photodiode array
J. Phys. B: At. Mol. Opt. Phys. 50, 214003 (2017).
https://doi.org/10.1088/1361-6455/aa8e68, arXiv:1706.00949

J. Sperling, A. Perez-Leija, K. Busch, and I. A. Walmsley
Quantum coherences of indistinguishable particles
Phys. Rev. A 96, 032334 (2017).
https://doi.org/10.1103/PhysRevA.96.032334, arXiv:1707.05545

E. Agudelo, J. Sperling, L. S. Costanzo, M. Bellini, A. Zavatta, and W. Vogel
Conditional Hybrid Nonclassicality
Phys. Rev. Lett. 119, 120403 (2017).
https://doi.org/10.1103/PhysRevLett.119.120403, arXiv:1702.04257

B. Kühn, W. Vogel, and J. Sperling
Displaced photon-number entanglement tests
Phys. Rev. A 96, 032306 (2017).
https://doi.org/10.1103/PhysRevA.96.032306, arXiv:1707.01707

M. Bohmann, J. Sperling, and W. Vogel
Entanglement verification of noisy NOON states
Phys. Rev. A 96, 012321 (2017).
https://doi.org/10.1103/PhysRevA.96.012321, arXiv:1704.05637

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, and W. Vogel
Identification of nonclassical properties of light with multiplexing layouts
Phys. Rev. A 96, 013804 (2017).
https://doi.org/10.1103/PhysRevA.96.013804, arXiv:1701.07642

J. Sperling and I. A. Walmsley
Entanglement in macroscopic systems
Phys. Rev. A 95, 062116 (2017).
https://doi.org/10.1103/PhysRevA.95.062116, arXiv:1611.06028

J. Sperling, E. Agudelo, I. A. Walmsley, and W. Vogel
Quantum correlations in composite systems
J. Phys. B: At. Mol. Opt. Phys. 50, 134003 (2017).
https://doi.org/10.1088/1361-6455/aa7438, arXiv:1703.05063

F. Krumm, W. Vogel, and J. Sperling
Time-dependent quantum correlations in phase space
Phys. Rev. A 95, 063805 (2017).
https://doi.org/10.1103/PhysRevA.95.063805, arXiv:1702.02550

M. Bohmann, R. Kruse, J. Sperling, C. Silberhorn, and W. Vogel
Probing free-space quantum channels with laboratory-based experiments
Phys. Rev. A 95, 063801 (2017).
https://doi.org/10.1103/PhysRevA.95.063801, arXiv:1702.04127

S. Ryl, J. Sperling, and W. Vogel
Quantifying nonclassicality by characteristic functions
Phys. Rev. A 95, 053825 (2017).
https://doi.org/10.1103/PhysRevA.95.053825, arXiv:1702.00213

J. Sperling, W. R. Clements, A. Eckstein, M. Moore, J. J. Renema, W. S. Kolthammer, S. W. Nam, A. Lita, T. Gerrits, W. Vogel, G. S. Agarwal, and I. A. Walmsley
Detector-Independent Verification of Quantum Light
Phys. Rev. Lett. 118, 163602 (2017).
https://doi.org/10.1103/PhysRevLett.118.163602, arXiv:1701.07640

M. Bohmann, R. Kruse, J. Sperling, C. Silberhorn, and W. Vogel
Direct calibration of click-counting detectors
Phys. Rev. A 95, 033806 (2017).
https://doi.org/10.1103/PhysRevA.95.033806, arXiv:1611.04779

M. Bohmann, J. Sperling, A. A. Semenov, and W. Vogel
Higher-order nonclassical effects in fluctuating-loss channels
Phys. Rev. A 95, 012324 (2017).
https://doi.org/10.1103/PhysRevA.95.012324, arXiv:1610.09053

S. Gerke, J. Sperling, W. Vogel, Y. Cai, J. Roslund, N. Treps, and C. Fabre
Multipartite Entanglement of a Two-Separable State
Phys. Rev. Lett. 117, 110502 (2016).
https://doi.org/10.1103/PhysRevLett.117.110502, arXiv:1603.05802

J. Sperling, T. J. Bartley, G. Donati, M. Barbieri, X.-M. Jin, A. Datta, W. Vogel, and I. A. Walmsley
Quantum Correlations from the Conditional Statistics of Incomplete Data
Phys. Rev. Lett. 117, 083601 (2016).
https://doi.org/10.1103/PhysRevLett.117.083601, arXiv:1603.01389

M. Bohmann, A. A. Semenov, J. Sperling, and W. Vogel
Gaussian entanglement in the turbulent atmosphere
Phys. Rev. A 94, 010302(R) (2016).
https://doi.org/10.1103/PhysRevA.94.010302, arXiv:1603.02828

J. Sperling, W. Vogel, and G. S. Agarwal
Operational definition of quantum correlations of light
Phys. Rev. A 94, 013833 (2016).
https://doi.org/10.1103/PhysRevA.94.013833, arXiv:1605.06975

J. Sperling
Characterizing maximally singular phase-space distributions
Phys. Rev. A 94, 013814 (2016).
https://doi.org/10.1103/PhysRevA.94.013814, arXiv:1605.04425

F. Krumm, J. Sperling, and W. Vogel
Multitime correlation functions in nonclassical stochastic processes
Phys. Rev. A 93, 063843 (2016).
https://doi.org/10.1103/PhysRevA.93.063843, arXiv:1603.09555

D. Bruns, J. Sperling, and S. Scheel
Witnessing random unitary and projective quantum channels: Complementarity between separable and maximally entangled states
Phys. Rev. A 93, 032132 (2016).
https://doi.org/10.1103/PhysRevA.93.032132, arXiv:1601.04817

R. Heilmann, J. Sperling, A. Perez-Leija, M. Gräfe, M. Heinrich, S. Nolte, W. Vogel, and A. Szameit
Harnessing click detectors for the genuine characterization of light states
Sci. Rep. 6, 19489 (2016).
https://doi.org/10.1038/srep19489, arXiv:1502.04932

T. Lipfert, J. Sperling, and W. Vogel
Homodyne detection with on-off detector systems
Phys. Rev. A 92, 053835 (2015).
https://doi.org/10.1103/PhysRevA.92.053835, arXiv:1508.03142

E. Agudelo, J. Sperling, W. Vogel, S. Köhnke, M. Mraz, and B. Hage
Continuous sampling of the squeezed-state nonclassicality
Phys. Rev. A 92, 033837 (2015).
https://doi.org/10.1103/PhysRevA.92.033837, arXiv:1411.6869

S. Ryl, J. Sperling, E. Agudelo, M. Mraz, S. Köhnke, B. Hage, and W. Vogel
Unified nonclassicality criteria
Phys. Rev. A 92, 011801(R) (2015).
https://doi.org/10.1103/PhysRevA.92.011801, arXiv:1505.06089

J. Sperling, M. Bohmann, W. Vogel, G. Harder, B. Brecht, V. Ansari, and C. Silberhorn
Uncovering Quantum Correlations with Time-Multiplexed Click Detection
Phys. Rev. Lett. 115, 023601 (2015).
https://doi.org/10.1103/PhysRevLett.115.023601, arXiv:1503.08028

J. Sperling and W. Vogel
Convex ordering and quantification of quantumness
Phys. Scr. 90, 074024 (2015).
https://doi.org/10.1088/0031-8949/90/7/074024, arXiv:1004.1944

M. Bohmann, J. Sperling, and W. Vogel
Entanglement and phase properties of noisy NOON states
Phys. Rev. A 91, 042332 (2015).
https://doi.org/10.1103/PhysRevA.91.042332, arXiv:1412.3321

A. Reusch, J. Sperling, and W. Vogel
Entanglement witnesses for indistinguishable particles
Phys. Rev. A 91, 042324 (2015).
https://doi.org/10.1103/PhysRevA.91.042324, arXiv:1501.02595

A. Luis, J. Sperling, and W. Vogel
Nonclassicality Phase-Space Functions: More Insight with Fewer Detectors
Phys. Rev. Lett. 114, 103602 (2015).
https://doi.org/10.1103/PhysRevLett.114.103602, arXiv:1412.3826

J. Sperling, W. Vogel, and G. S. Agarwal
Balanced homodyne detection with on-off detector systems: Observable nonclassicality criteria
Europhys. Lett. 109, 34001 (2015).
https://doi.org/10.1209/0295-5075/109/34001, arXiv:1410.8012

S. Gerke, J. Sperling, W. Vogel, Y. Cai, J. Roslund, N. Treps, and C. Fabre
Full Multipartite Entanglement of Frequency-Comb Gaussian States
Phys. Rev. Lett. 114, 050501 (2015).
https://doi.org/10.1103/PhysRevLett.114.050501, arXiv:1409.5692

F. Shahandeh, J. Sperling, and W. Vogel
Structural Quantification of Entanglement
Phys. Rev. Lett. 113, 260502 (2014).
https://doi.org/10.1103/PhysRevLett.113.260502, arXiv:1407.4589

A. J. Gutiérrez-Esparza, W. M. Pimenta, B. Marques, A. A. Matoso, J. Sperling, W. Vogel, and S. Pádua
Detection of nonlocal superpositions
Phys. Rev. A 90, 032328 (2014).
https://doi.org/10.1103/PhysRevA.90.032328

M. Mraz, J. Sperling, W. Vogel, and B. Hage
Witnessing the degree of nonclassicality of light
Phys. Rev. A 90, 033812 (2014).
https://doi.org/10.1103/PhysRevA.90.033812, arXiv:1406.7094

W. Vogel and J. Sperling
Unified quantification of nonclassicality and entanglement
Phys. Rev. A 89, 052302 (2014).
https://doi.org/10.1103/PhysRevA.89.052302, arXiv:1401.5222

J. Sperling, W. Vogel, and G. S. Agarwal
Quantum state engineering by click counting
Phys. Rev. A 89, 043829 (2014).
https://doi.org/10.1103/PhysRevA.89.043829, arXiv:1403.1044

F. E. S. Steinhoff, M. C. de Oliveira, J. Sperling, and W. Vogel
Bipartite bound entanglement in continuous variables through degaussification
Phys. Rev. A 89, 032313 (2014).
https://doi.org/10.1103/PhysRevA.89.032313, arXiv:1304.1592

F. Shahandeh, J. Sperling, and W. Vogel
Operational Gaussian Schmidt-number witnesses
Phys. Rev. A 88, 062323 (2013).
https://doi.org/10.1103/PhysRevA.88.062323, arXiv:1309.6508

J. Sperling, W. Vogel, and G. S. Agarwal
Correlation measurements with on-off detectors
Phys. Rev. A 88, 043821 (2013).
https://doi.org/10.1103/PhysRevA.88.043821, arXiv:1309.3058

D. Pagel, H. Fehske, J. Sperling, and W. Vogel
Multipartite entangled light from driven microcavities
Phys. Rev. A 88, 042310 (2013).
https://doi.org/10.1103/PhysRevA.88.042310, arXiv:1308.6077

J. Sperling and W. Vogel
Multipartite Entanglement Witnesses
Phys. Rev. Lett. 111, 110503 (2013).
https://doi.org/10.1103/PhysRevLett.111.110503, arXiv:1303.6403

E. Agudelo, J. Sperling, and W. Vogel
Quasiprobabilities for multipartite quantum correlations of light
Phys. Rev. A 87, 033811 (2013).
https://doi.org/10.1103/PhysRevA.87.033811, arXiv:1211.1585

C. Gehrke, J. Sperling, and W. Vogel
Quantification of nonclassicality
Phys. Rev. A 86, 052118 (2012).
https://doi.org/10.1103/PhysRevA.86.052118, arXiv:0904.3390

D. Pagel, H. Fehske, J. Sperling, and W. Vogel
Strongly entangled light from planar microcavities
Phys. Rev. A 86, 052313 (2012).
https://doi.org/10.1103/PhysRevA.86.052313, arXiv:1207.4899

A. Miranowicz, P. Horodecki, R. W. Chhajlany, J. Tuziemski, and J. Sperling
Analytical progress on symmetric geometric discord: Measurement-based upper bounds
Phys. Rev. A 86, 042123 (2012).
https://doi.org/10.1103/PhysRevA.86.042123, arXiv:1209.2698

J. Sperling, W. Vogel, and G. S. Agarwal
Sub-Binomial Light
Phys. Rev. Lett. 109, 093601 (2012).
https://doi.org/10.1103/PhysRevLett.109.093601, arXiv:1205.4669

J. Sperling and W. Vogel
Entanglement quasiprobabilities of squeezed light
New J. Phys. 14, 055026 (2012).
https://doi.org/10.1088/1367-2630/14/5/055026, arXiv:1206.0165

J. Sperling, W. Vogel, and G. S. Agarwal
True photocounting statistics of multiple on-off detectors
Phys. Rev. A 85, 023820 (2012).
https://doi.org/10.1103/PhysRevA.85.023820, arXiv:1202.5106

J. Sperling and W. Vogel
Determination of the Schmidt number
Phys. Rev. A 83, 042315 (2011).
https://doi.org/10.1103/PhysRevA.83.042315, arXiv:1103.1287

J. Sperling and W. Vogel
The Schmidt number as a universal entanglement measure
Phys. Scr. 83, 045002 (2011).
https://doi.org/10.1088/0031-8949/83/04/045002, arXiv:0908.3974

W. Vogel, T. Kiesel, and J. Sperling
Characterizing nonclassicality and entanglement
Opt. Spectrosc. 108, 197 (2010).
https://doi.org/10.1134/S0030400X10020074

J. Sperling and W. Vogel
Verifying continuous-variable entanglement in finite spaces
Phys. Rev. A 79, 052313 (2009).
https://doi.org/10.1103/PhysRevA.79.052313, arXiv:0809.3197

J. Sperling and W. Vogel
Representation of entanglement by negative quasiprobabilities
Phys. Rev. A 79, 042337 (2009).
https://doi.org/10.1103/PhysRevA.79.042337, arXiv:0811.4527

J. Sperling and W. Vogel
Necessary and sufficient conditions for bipartite entanglement
Phys. Rev. A 79, 022318 (2009).
https://doi.org/10.1103/PhysRevA.79.022318, arXiv:0805.1318

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