quantum science, incl. quantum optics and quantum information theory

theoretical/mathematical physics

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