List of Publications



Comment on “Peres experiment using photons: No test for hypercomplex (quaternionic) quantum theories”
L.M. Procopio, L.A. Rozema, B. Dakic, P. Walther,
Physical Review A 96, 036101 (2017).

Macroscopic Superpositions as Quantum Ground States
B. Dakic, M. Radonjic,
Physical Review Letters 119, 090401 (2017).

Numerical Investigation of Photon-Pair Generation in Periodically Poled MTiOXO4 (M=K, Rb, Cs; X=P, As)
F. Laudenbach, R.-B. Jin, C. Greganti, M. Hentschel, P. Walther, H. Hübel,
Physical Review Applied 8, 024035 (2017).

A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
F. Laudenbach, S. Kalista, M. Hentschel, P. Walther, H. Hübel,
Scientific Reports 7, 7235 (2017).

Single-photon test of hyper-complex quantum theories using a metamaterial
L.M. Procopio, L.A. Rozema, Z. Jing Wong, D.R. Hamel, K. O'Brien, X. Zhang, B. Dakic, P. Walther,
Nature Communications 8, 15044 (2017).

Experimental Verification of an indefinite Causal Order
G. Rubino, L.A. Rozema, A. Feix, M. Araújo, J.M. Zeuner, L.M. Procopio, C. Brukner, P. Walther,
Science Advances 3, e1602589 (2017).

Gravitationally induced phase shift on a single photon
C. Hilweg, F. Massa, D. Martynov, N. Mavalvala, P.T. Chruściel, P. Walther,
New Journal of Physics 19, 033028 (2017).



On unitary reconstruction of linear optical networks
M. Tillmann, C. Schmidt, P. Walther,
Journal of Optics, 18,  4002 (2016).

Quantum technology: from research to application
W. P. Schleich, K. S. Ranade, C. Anton, M. Arndt, M. Aspelmeyer, M. Bayer, G. Berg, T. Calarco, H. Fuchs, E. Giacobino, M. Grassl, P. Hänggi, W.M. Heckl, I.-V. Hertel, S. Huelga, F. Jelezko, B. Keimer, J.P. Kotthaus, G. Leuchs, N. Lütkenhaus, U. Maurer, T. Pfau, M.B. Plenio, E.M. Rasel, O. Renn, C. Silberhorn, J. Schiedmayer, D. Schmitt-Landsiedel, K. Schönhammer, A. Ustinov, P. Walther, H. Weinfurter, E. Welzl, R. Wiesendanger, S. Wolf, A. Zeilinger, P. Zoller,
Applied Physics B, 122, 130 (2016).

Modelling parametric down-conversion yielding spectrally pure photon pairs
F. Laudenbach, H. Hübel, M. Hentschel, P. Walther, A. Poppe,
Optics Express 24, 2712-2727 (2016).

Demonstration of measurement-only blind quantum computing
C. Greganti, M.-C. Roehsner, S. Barz, T. Morimae, P. Walther.
New Journal of Physics 18, 013020 (2016).

A novel single-crystal-single-pass source for polarisation- and colour-entangled photon pairs
F. Laudenbach, S. Kalista, M. Hentschel, P. Walther, H. Hübel,
arXiv:1612.06579, (2016).

Comment on Adler's "Does the Peres experiment using photons test for hyper-complex (quaternionic) quantum theories?"
L.M. Procopio, L.A. Rozema, B. Dakic, P. Walther,
arXiv:1607.01648, (2016).



Generalized Multiphoton Quantum Interference
M. Tillmann, S.-H. Tan, S.E. Stoeckl, B.C. Sanders, H. de Guise, R. Heilmann, S. Nolte, A. Szameit, P. Walther,
Physical Review X 5, 041015 (2015).

Experimental Superposition of Orders of Quantum Gates
L.M. Procopio, A. Moqanaki, M. Araújo, F. Costa, I.A. Calafell, E.G. Dowd, D.R. Hamel, L.A. Rozema, C. Brukner, P. Walther,
Nature Communications 6, 7913 (2015).

Linear-optical generation of eigenstates of the two-site XY model
S. Barz, B. Dakic, Y.-O. Lipp, F. Verstraete, J.D. Whitfield, P. Walther,
Physical Review X 5, 021010 (2015).

Practical and efficient experimental characterization of multiqubit stabilizer states
C. Greganti, M.-C. Roehsner, S. Barz, M. Waegell, P. Walther,
Physical Review A 91, 022325 (2015).



Demonstrating elements of measurement-based quantum error correction
S. Barz, R. Vasconcelos, C. Greganti, M. Zwerger, W. Dür, H.J. Briegel, P. Walther,
Physical Review A 90, 042302 (2014).

A two-qubit photonic quantum processor and its application to solving systems of linear equations
S. Barz, I. Kassal, M. Ringbauer, Y.O. Lipp, B. Dakic, A. Aspuru-Guzik, P. Walther,
Scientific Reports 4, 6115 (2014).

Photonic toolbox for quantum simulation
X.S. Ma, B. Dakic, P. Walther,
Advances in Chemical Physics 154, 229-240 (2014).

Towards photonic quantum simulation of ground states of frustrated Heisenberg spin systems
X.S. Ma, B. Dakic, S. Kropatschek, W. Naylor, Y.-H. Chan, Z.-X. Gong, L.-M. Duan, A. Zeilinger, P. Walther,
Scientific Reports 4, 3583 (2014).

Preface: Quantum Communication, Measurement and Computing (QCMC)
J. Schmiedmayer, P. Walther (eds.),
AIP Conference Proceedings Series, Vol. 1633, 1-3 (2014).



Experimental verification of quantum computation
S. Barz, J.F. Fitzsimons, E. Kashefi, P. Walther,
Nature Physics 9, 727-731 (2013).

Experimental Boson Sampling
M. Tillmann, B. Dakic, R. Heilmann, S. Nolte, A. Szameit, P. Walther,
Nature Photonics 7, 540-544 (2013).

No-go theorem for passive single-rail linear optical quantum computing
L.-A. Wu, P. Walther, D.A. Lidar,
Scientific Reports 3, 1394 (2013).

Entanglement as an Element-of-Reality
P. Walther,
Max Planck Research Library for the History and Development of Knowledge, Proc. 3, 163-176 (2013).



Photonic quantum computing and quantum simulation P. Walther (2012).

Quantum discord as optimal resource for remote state preparation
B. Dakic, Y.-O. Lipp, X.S. Ma, M. Ringbauer, S. Kropatschek, S. Barz, T. Paterek, V. Vedral, A. Zeilinger, C. Brukner, P. Walther,
Nature Physics 8, 666-670 (2012).

Photonic quantum simulators
A. Aspuru-Guzik, P. Walther,
Nature Physics 8, 285-291 (2012)

Demonstration of blind quantum computing
S. Barz, E. Kashefi, A. Broadbent, J. Fitzsimons, A. Zeilinger, P. Walther,
Science 335, 303-308 (2012)

Nur die Neugier zählt!  ̶  Wie sonst käme ein Chemiker zur Quantenphysik?
P. Walther,
Lehrfibel der Jungen Akademie, Deutschland (2012).

Experimental engineering of photonic quantum entanglement
S. Barz, G. Cronenberg, P. Walther,
Advanced Photonic Sciences, M. Fadhali (eds.), ISBN: 978-953-51-0153-6, InTech (2012).



Quantum simulation of a frustrated Heisenberg spin system
X.S. Ma, B. Dakic, W. Naylor, A. Zeilinger, P. Walther,
Nature Physics 7, 399-405 (2011)

Quantum Simulation with Light: Frustrations between Photon Pairs
P. Walther,
Contribution to the website (2011).

Wie wirklich ist die Wirklichkeit?
P. Walther,
Das naturwissenschaftliche Weltbild am Beginn des 21. Jahrhunderts, Series of the Karl Popper Foundation Klagenfurt, B. Kanitscheider, R. Neck (eds.): Peter Lang Verlag, Vol. 6, 123-128 (2011).

Experimental photonic state engineering and quantum control of two optical qubits
S. Barz, X.S. Ma, B. Dakic, A. Zeilinger, P. Walther,
Quantum Communication, Measurement and Computing (QCMC), T. Ralph and P.-K. Lam (eds.),
AIP Conference Proceedings Series, Vol. 1363, 13-16 (2011).



Heralded generation of entangled photon pairs
S. Barz, G. Cronenberg, A. Zeilinger, P. Walther,
Nature Photonics 4, 553-556 (2010)
news and views: Nature Photonics 4, 504 (2010)

Beating the classical camera
S. Barz, P. Walther,
Nature Photonics 4, 199-200 (2010).



Experimental Realization of Dicke States of up to Six Qubits for Multiparty Quantum Networking
R. Prevedel, G. Cronenberg, M.S. Tame, M. Paternostro, P. Walther, M.S. Kim, A. Zeilinger,
Physical Review Letters 103, 020503 (2009)

Ligand dynamics on the surface of zirconium oxo clusters
P. Walther, M. Puchberger, F.R. Kogler, K. Schwarz, U. Schubert,
Physical Chemistry Chemical Physics 11, 3640 (2009)



Quantum memory for long-distance and multiphoton entanglement
P. Walther, A. Nemiroski, A. Gorshkov, A. Zibrov, and M. Lukin,
SPIE Newsroom (2008).



Experimental realization of a quantum game on a one-way quantum computer
R. Prevedel, A. Stefanov, P. Walther, A. Zeilinger,
New Journal of Physics 9, 205 (2007)

Generation of Narrow-Bandwidth Single Photons using Electromagnetically Induced Transparency in Atomic Ensembles
P. Walther, M.D. Eisaman, A. André, F. Massou, M. Fleischhauer, A.S. Zibrov, M.D. Lukin,
International Journal of Quantum Information 5, 51 (2007).

High-speed linear optics quantum computing using active feed-forward
R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, A. Zeilinger,
Nature 445, 65-69 (2007).

Heralded generation of multi-photon entanglement
P. Walther, M. Aspelmeyer, A. Zeilinger,
Physical Review A 75, 021313 (2007).

Multi-photon entanglement: From quantum curiosity to quantum computing and quantum repeaters
P. Walther, M.D. Eisaman, A. Nemiroski, A. Gorshkov, A.S. Zibrov, A. Zeilinger, M.D. Lukin,
Proc. SPIE Vol. 6664, 66640G (2007).



Experimental Entangled Entanglement
P. Walther, K. Resch, C. Brukner, A. Zeilinger,
Physical Review Letters 97, 020501 (2006).

Quantum Entanglement, Purification, and linear-optics quantum gates with photonic qubits
P. Walther, A. Zeilinger,
QP-PQ Quantum Probability and White Noise Analysis Vol. 19, Quantum Information and Computing, L. Accardi, M. Ohya and N. Watanabe (eds.): World Scientific, 360-369 (2006).



Entanglement and Nonlocality in Multi-Photon Systems P. Walther (2005).

Experimental violation of a cluster state Bell inequality
P. Walther, M. Aspelmeyer, K. Resch, A. Zeilinger,
Physical Review Letters 95, 020403 (2005).

Experimental One-Way Quantum Computing
P. Walther, K.J. Resch, T. Rudolph, E. Schenck, H. Weinfurter, V. Vedral, M. Aspelmeyer, A. Zeilinger,
Nature 434, 169-176 (2005).

Experimental Realization of a photonic Bell-state analyser
P. Walther, A. Zeilinger,
Physical Review A 72, 010302(R) (2005).

Local conversion of GHZ states to approximate W states
P. Walther, K.J. Resch, A. Zeilinger,
Physical Review Letters 94, 240501 (2005).

Full characterization of a three-photon GHZ state using quantum state tomography
K.J. Resch, P. Walther, A. Zeilinger,
Physical Review Letters 94, 070402 (2005).

Distributing entanglement and single photons through an intra-city, free-space quantum channel
K.J. Resch, M. Lindenthal, B. Blauensteiner, H.R. Böhm, A. Fedrizzi, A. Poppe, T. Schmidtt-Manderbach, M. Taraba, R. Ursin, P. Walther, H. Weier, H. Weinfurter, A. Zeilinger,
Optics Express 13, 202-209 (2005).

Quantum nonlocality obtained from local states by entanglement purification
P. Walther, K.J. Resch, C. Brukner, A.M. Steinberg, J.-W. Pan, A. Zeilinger,
Physical Review Letters 94, 040504 (2005).

Quantum Physics from A to Z
M. Arndt, M. Aspelmeyer, H.J. Bernstein, R. Bertlmann, C. Brukner, J.P. Dowling, J. Eisert, A. Ekert, C.A. Fuchs, D.M. Greenberger, M.A. Horne, T. Jennewein, P.G. Kwiat, N.D. Mermin, J.-W. Pan, E.M. Rasel, H. Rauch, T.G. Rudolph, C. Salomon, A.V. Sergienko, J. Schmiedmayer, C. Simon, V. Vedral, P. Walther, G. Weihs, P. Zoller, M. Zukowski,
Quantum Physics of Nature (QUPON) Conference, Vienna (2005).
Preprint at arXiv:quant-ph/0505187v4

Quantum Logics based on Four Photon Entanglement
P. Walther, A. Zeilinger.
Decoherence, Entanglement and Information Protection in Complex Quantum Systems, V. M. Akulin, A. Sarfati, G. Kurizki and S. Pellegrin (eds.),
Springer, 49-62 (2005).

Experimental four-qubit quantum logics based on cluster states
P. Walther, K. Resch, M. Aspelmeyer, T. Rudolph, E. Schenck, H. Weinfurter, V. Vedral, A. Zeilinger,
55. Jahrestagung der Österreichischen Physikalischen Gesellschaft Vol. 37, 36 (2005)

Advanced Quantum Communication Experiments with Entangled Photons
M. Aspelmeyer, H. Böhm, A. Fedrizzi, S. Gasparoni, M. Lindenthal, G. Molina-Terriza, A. Poppe, K. Resch, R. Ursin, P. Walther, A. Zeilinger, T. Jennewein, Book Dekker, Special Volume on Quantum Communications and Cryptography, A.V. Sergienko (eds.).
Taylor & Francis group, New York, 45-81 (2005).

Distributing entanglement and single photons through an intra-city, free-space quantum channel
K.J. Resch, M. Lindenthal, B. Blauensteiner, H. Böhm, A. Fedrizzi, M. Taraba, R. Ursin, P. Walther, A. Poppe, T. Schmitt-Manderbach, H. Weier, H. Weinfurter, A. Zeilinger,
European Quantum Electronics Conference, EQEC '05. vol. 2005, 1567464, pp. 298, (2005).



Quantum teleportation across the Danube
R. Ursin, T. Jennewein, M. Aspelmeyer, R. Kaltenbaek, M. Lindenthal, P. Walther, A. Zeilinger,
Nature 430, 849 (2004).

Realization of a Photonic Controlled-NOT Gate Sufficient for Quantum Computation
S. Gasparoni, J.-W. Pan, P. Walther, T. Rudolph, A. Zeilinger,
Physical Review Letters 92, 020504 (2004).

De Broglie Wavelength of a Nonlocal Four-Photon state
P. Walther, J.-W. Pan, M. Aspelmeyer, R. Ursin, S. Gasparoni, A. Zeilinger,
Nature 429, 158-161 (2004).

Nonlocal Photon Number States for Quantum Metrology
M. Aspelmeyer, P. Walther, T. Jennewein, A. Zeilinger, Quantum Communications and Quantum Imaging II, R. Meyers and Y. Shih (eds.)
Proc. SPIE Vol. 5551, 15-20 (2004).



Long-Distance Free-Space Distribution of Quantum Entanglement
M. Aspelmeyer, H.R. Böhm, T. Gyatso, T. Jennewein, R. Kaltenbaek, M. Lindenthal, G. Molina-Terriza, A. Poppe, K. Resch, M. Taraba, R. Ursin, P. Walther, A. Zeilinger,
Science 301, 621-623 (2003).

Quantum Communications in Space
M. Aspelmeyer, T. Jennewein, H.R. Böhm, C. Brukner, R. Kaltenbaek, M. Lindenthal, G. Molina-Terriza, J. Petschinka, R. Ursin, P. Walther, A. Zeilinger, M. Pfennigbauer, W.R. Leeb,
Tech. Rep. in contract 16358/02, ESA (2003).


Ab Initio Molecular Dynamics Applied to Oxo-zirconium Nanoparticles. P. Walther (2002).