Publications 2021
- Entangling logical qubits with lattice surgery
A. Erhard∗, H. Poulsen Nautrup∗, M. Meth, L. Postler, R. Stricker, M. Ringbauer, P. Schindler, H. J. Briegel, R. Blatt, N. Friis, T. Monz
Nature 589, 220-224 (2021)
https://doi.org/10.1038/s41586-020-03079-6; arXiv:2006.03071 - Experimental quantum speed-up in reinforcement learning agents
V. Saggio, B. E. Asenbeck, A. Hamann, T. Strömberg, P. Schiansky, V. Dunjko, N. Friis, N. C. Harris, M. Hochberg, D. Englund, S. Wölk, H. J. Briegel, P. Walther
Nature 591, 229 (2021)
https://doi.org/10.1038/s41586-021-03242-7 - Parametrized quantum policies for reinforcement learning
S. Jerbi, C. Gyurik, S. C. Marshall, H. J. Briegel, V. Dunjko
NeurIPS 34 (2021)
https://proceedings.neurips.cc/paper/2021/file/eec96a7f788e88184c0e713456026f3f-Paper.pdf - Quantum enhancements for deep reinforcement learning in large spaces
S. Jerbi, L. M. Trenkwalder, H. Poulsen Nautrup, H. J. Briegel, V. Dunjko
PRX Quantum 2, 010328 (2021)
https://doi.org/10.1103/PRXQuantum.2.010328 - Reinforcement learning for optimization of variational quantum circuit architectures
M. Ostaszewski, L. M. Trenkwalder, W. Masarczyk, E. Scerri, V. Dunjko
NeurIPS 34 (2021)
https://proceedings.neurips.cc/paper/2021/file/9724412729185d53a2e3e7f889d9f057-Paper.pdf - Quantum-accessible reinforcement learning beyond strictly epochal environments
A. Hamann, V. Dunjko, S. Wölk
Quantum Mach. Intell. 3, 22 (2021)
https://doi.org/10.1007/s42484-021-00049-7 - Emergence of biased errors in imperfect optical circuits
F. Flamini
Phys. Rev. Applied 16, 064038 (2021)
https://doi.org/10.1103/PhysRevApplied.16.064038 - Honeybee communication during collective defence is shaped by predation
A. López-Incera, M. Nouvian, K. Ried, T. Müller, H. J. Briegel
BMC Biol 19, 106 (2021)
https://doi.org/10.1186/s12915-021-01028-x - General expressions for the quantum Fisher information matrix with applications to discrete quantum imaging
L. J. Fiderer, T. Tufarelli, S. Piano, G. Adesso
PRX Quantum 2(2), 020308 (2021)
https://doi.org/10.1103/PRXQuantum.2.020308 - Witnessing Bell violations through probabilistic negativity
B. Morris, L. J. Fiderer, B. Lang, D. Goldwater
Phys. Rev. A 105, 032202 (2021)
https://doi.org/10.1103/PhysRevA.105.032202 - The Essence of Entanglement
Č. Brukner, M. Żukowski, A. Zeilinger
10. Okt. 2021, in Quantum Arrangements: Contributions in Honor of Michael Horne, Jaeger, G., Simon, D., Sergienko, A. V., Greenberger, D. & Zeilinger, A. (Hrsg.)
Springer Science and Business Media Deutschland GmbH, Band 203. S. 117-138 22 S. (Fundamental Theories of Physics, Band 203)
https://doi.org/10.1007/978-3-030-77367-0_6 - Transformation of spin in quantum reference frames
M. Mikusch, L. C. Barbado, Č. Brukner
Phys. Rev. Research 3, 043138 (2021)
https://doi.org/10.1103/PhysRevResearch.3.043138 - Quantum superposition of thermodynamic evolutions with opposing time’s arrows
G. Rubino, G. Manzano, Č. Brukner
Communication Physics 4, 251 (2021)
https://doi.org/10.1038/s42005-021-00759-1 - Reassessing the computational advantage of quantum-controlled ordering of gates
M. J. Renner, Č. Brukner
Phys. Rev. Research 3, 043012 (2021)
https://doi.org/10.1103/PhysRevResearch.3.043012 - Relativistic Bell Test within Quantum Reference Frames
L. F. Streiter, F. Giacomini, Č. Brukner
Phys. Rev. Lett. 126, 230403 (2021)
https://doi.org/10.1103/PhysRevLett.126.230403 - Experimental quantum communication enhancement by superposing trajectories
G. Rubino, L.A. Rozema, D. Ebler, H. Kristjánsson, S. Salek, P. A. Guérin, A. A. Abbott, C. Branciard, Č. Brukner, G. Chiribella, P. Walther
Phys. Rev. Research 3, 013093 (2021)
https://doi.org/10.1103/PhysRevResearch.3.013093 - Equivalence of grandfather and information antinomy under intervention
A. Baumeler, E. Tselentis
Proceedings of the 17th International Conference on Quantum Physics and Logic, Electronic Proceedings in Theoretical Computer Science 340, 1 (2021)
https://doi.org/10.4204/EPTCS.340.1 - Ticking-clock performance enhanced by nonclassical temporal correlations
C. Budroni, G. Vitagliano, M. P. Woods
Phys. Rev. Research 3, 033051 (2021)
https://dx.doi.org/10.1103/PhysRevResearch.3.033051 - Device-independent quantification of measurement incompatibility
S.-L. Chen, N. Miklin, C. Budroni, Y.-N. Chen
Phys. Rev. Research 3, 023143 (2021)
https://dx.doi.org/10.1103/PhysRevResearch.3.023143 - Simple and maximally robust processes with no classical common-cause or direct cause explanation
M. Nery, M. T. Quintino, P. A. Guérin, T. O. Maciel, R. O. Vianna
Quantum 5, 538 (2021)
https://doi.org/10.22331/q-2021-09-09-538 - Certifying dimension of quantum systems by sequential projective measurements
A. Sohbi, D. Markham, J. Kim, M.T. Quintino
Quantum 5, 472 (2021)
https://doi.org/10.22331/q-2021-06-10-472 - Success-or-Draw: A Strategy Allowing Repeat-Until-Success in Quantum Computation
Q. Dong, M.T. Quintino, A. Soeda, M. Murao
Phys. Rev. Lett. 126, 150504 (2021)
https://doi.org/10.1103/PhysRevLett.126.150504 - Strict Hierarchy between Parallel, Sequential, and Indefinite-Causal-Order Strategies for Channel Discrimination
J. Bavaresco, M. Murao, M.T. Quintino
Phys. Rev. Lett. 127, 200504 (2021)
https://doi.org/10.1103/PhysRevLett.127.200504 - Entanglement marginal problems
M. Navascues, F. Baccari, A. Acín
Quantum 5, 589 (2021)
https://doi.org/10.22331/q-2021-11-25-589 - Locally accurate tensor networks for thermal states and time evolution
Á. M. Alhambra, J. I. Cirac
PRX Quantum 2, 040331 (2021)
https://doi.org/10.1103/PRXQuantum.2.040331 - Computable Rényi mutual information: Area laws and correlations
S. O. Scalet, A. M. Alhambra, G. Styliaris, J. I. Cirac
Quantum 5, 541 (2021)
https://doi.org/10.22331/q-2021-09-14-541 - Quantum algorithms for powering stable Hermitian matrices
G. González, R. Trivedi, J. I. Cirac
Phys. Rev. A 103, 062420 (2021)
https://doi.org/10.1103/PhysRevA.103.062420 - Modeling and mitigation of cross-talk effects in readout noise with applications to the Quantum Approximate Optimization Algorithm
F. B. Maciejewski, F. Baccari, Z. Zimboras, M. Oszmaniec
Quantum 5, 464 (2021)
https://doi.org/10.22331/q-2021-06-01-464 - Algorithms for quantum simulation at finite energies
S.-R. Lu, M. C. Bañuls, J. I. Cirac
PRX Quantum 2, 020321 (2021)
https://doi.org/10.1103/PRXQuantum.2.020321 - The quantum marginal problem for symmetric states: applications to variational optimization, nonlocality and self-testing
A. Aloy, M. Fadel, J. Tura i Brugués
New J. Phys. 23, 033026 (2021)
https://doi.org/10.1088/1367-2630/abe15e - Generation of Photonic Matrix Product States with Rydberg Atomic Arrays
Z.-Y. Wei, D. Malz, A. González-Tudela, J. I. Cirac
Phys. Rev. Research 3, 023021 (2021)
https://doi.org/10.1103/PhysRevResearch.3.023021 - Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction
M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Žemlička, J. Fink
PRX Quantum 2, 040341 (2021)
https://doi.org/10.1103/PRXQuantum.2.040341 - Non-Markovian Effects of Two-Level Systems in a Niobium Coaxial Resonator with a Single-Photon Lifetime of 10 milliseconds
P. Heidler, C. M. F. Schneider, K. Kustura, C. Gonzalez-Ballestero, O. Romero-Isart, G. Kirchmair
Phys. Rev. Applied 16, 34024 (2021)
https://doi.org/10.1103/PhysRevApplied.16.034024 - Theoretical and Experimental Perspectives of Quantum Verification
J. Carrasco, A. Elben, C. Kokail, B. Kraus, and P. Zoller
PRX Quantum 2, 010102 (2021)
https://doi.org/10.1103/PRXQuantum.2.010102 - Symmetry-resolved entanglement detection using partial transpose moments
A. Neven, J. Carrasco, V. Vitale, C. Kokail, A. Elben, M. Dalmonte, P. Calabrese, P. Zoller, B. Vermersch, R. Kueng, B. Kraus
npj Qauntum Information 7, 152 (2021)
https://doi.org/10.1038/s41534-021-00487-y - Local Transformations of Multiple Multipartite States
A. Neven, D. Gunn, M. Hebenstreit, B. Kraus
SciPost Phys. 11, 042 (2021)
https://scipost.org/10.21468/SciPostPhys.11.2.042 - Measurement outcomes that do not occur and their role in entanglement transformations
M. Hebenstreit, M. Englbrecht, C. Spee, J. I. de Vicente, B. Kraus
New J. Phys. 23, 033046 (2021)
https://doi.org/10.1088/1367-2630/abe60c - Two-parameter counter-diabatic driving in quantum annealing
L. Prielinger, A. Hartmann, Y. Yamashiro, K. Nishimura, W. Lechner, H. Nishimori
Physical Review Research 3, 013227 (2021)
https://doi.org/10.1103/PhysRevResearch.3.013227 - Minimal constraints in the parity formulation of optimization problems
M. Lanthaler, W. Lechner
New Journal of Physics 23, 083039 (2021)
https://doi.org/10.1088/1367-2630/ac1897 - Embedding Overhead Scaling of Optimization Problems in Quantum Annealing
M. S. Könz, W. Lechner, H. G. Katzgraber, M. Troyer
PRX Quantum 2, 040322 (2021)
https://doi.org/10.1103/PRXQuantum.2.040322 - Qualifying quantum approaches for hard industrial optimization problems. A case study in the field of smart-charging of electric vehicles
C. Dalyac, L. Henriet, E. Jeandel, W. Lechner, S. Perdrix, M. Porcheron, M. Veshchezerova
EPJ Quantum Technology 8, 12 (2021)
https://doi.org/10.1140/epjqt/s40507-021-00100-3 - Compact ion-trap quantum computing demonstrator
I. Pogorelov, T. Feldker, Ch. D. Marciniak, L. Postler, G. Jacob, O. Krieglsteiner, V. Podlesnic, M. Meth, V. Negnevitsky, M. Stadler, B. Höfer, C. Wächter, K. Lakhmanskiy, R. Blatt, P. Schindler, and T. Monz
PRX Quantum 2, 020343 (2021)
https://doi.org/10.1103/PRXQuantum.2.020343 - Cross-verification of independent quantum devices
C. Greganti, T. F. Demarie, M. Ringbauer, J. A. Jones, V. Saggio, I. A. Calafell, L. A. Rozema, A. Erhard, M. Meth, L. Postler, R. Stricker, P. Schindler, R. Blatt, T. Monz, P. Walther, J. F. Fitzsimons
Physical Review X 11, 031049 (2021)
https://journals.aps.org/prx/abstract/10.1103/PhysRevX.11.031049 - Quantum enhancement to information speed acquisition
S. Horvat, B. Dakić
New J. Phys. 23, 033008 (2021)
https://doi.org/10.1088/1367-2630/abe9d4 - Interference as an information-theoretic game
S. Horvat B. Dakić
Quantum 5, 404 (2021)
https://doi.org/10.22331/q-2021-03-08-404 - Higher-order interference between multiple quantum particles interacting nonlinearly
L. A. Rozema, Z. Zhuo, T. Paterek, B. Dakić
Phys. Rev. A 103, 052204 (2021)
https://doi.org/10.1103/PhysRevA.103.052204 - Macroscopically nonlocal quantum correlations
M. Gallego, B. Dakić
Phys. Rev. Lett. 127, 120401 (2021)
https://doi.org/10.1103/PhysRevLett.127.120401 - Giant enhancement of third-harmonic generation in graphene–metal heterostructures
I. Alonso Calafell, L.A. Rozema, D. Alcaraz Iranzo, A. Trenti, P.K. Jenke, J.D. Cox, A. Kumar, H. Bieliaiev, S. Nanot, C. Peng, D.K. Efetov, J.Y. Hong, J. Kong, D.R. Englund, F.J. García de Abajo, F.H.L. Koppens, P. Walther
Nature Nanotechnology 16, 318–324 (2021)
https://doi.org/10.1038/s41565-020-00808-w - Probabilistic one-time programs using quantum entanglement
M.-C. Röhsner, J. A. Kettlewell, J. Fitzsimons, P. Walther
npj Quantum Information 7, 98 (2021)
https://doi.org/10.1038/s41534-021-00435-w - Quantum cryptography with highly entangled photons from semiconductor quantum dots
C. Schimpf, M. Reindl, D. Huber, B. Lehner, S.F. Covre Da Silva, S. Manna, M. Vyvlecka,
P. Walther, A. Rastelli
Science Advances 7, 16 (2021)
https://doi.org/10.1126/sciadv.abe8905 - Experimental quantum homomorphic encryption
J. Zeuner, I. Pitsios, S.-H. Tan, A. Sharma, J. Fitzsimons, R. Osellame, P. Walther
npj Quantum Information 7, 25 (2021)
https://doi.org/10.1038/s41534-020-00340-8 - Fiber-compatible photonic feed-forward with 99% fidelity
G. L. Zanin, M. Jacquet, M. Spagnolo, P. Schiansky, I. Alonso Calafell, L.A. Rozema, P. Walther
Optic Express 29, 3425-3437 (2021)
https://doi.org/10.1364/OE.409867 - Difference-frequency generation in an AlGaAs Bragg-reflection waveguide using an on-chip electrically-pumped quantum dot laser
A. Schlager, M. Götsch, R. J. Chapman, S. Frick, H. Thiel, H. Suchomel, M. Kamp, S. Höfling, C. Schneider, and G. Weihs
Journal of Optics 23, 085802 (2021)
https://doi.org/10.1088/2040-8986/ac13ae - Symmetry Allows for Distinguishability in Totally Destructive Many-Particle Interference
J. Münzberg, C. Dittel, M. Lebugle, A. Buchleitner, A. Szameit, G. Weihs, and R. Keil,
PRX Quantum 2, 020326 (2021)
https://doi.org/10.1103/PRXQuantum.2.020326 - Towards probing for hypercomplex quantum mechanics in a waveguide interferometer
S. Gstir, E. Chan, T. Eichelkraut, A. Szameit, R. Keil, and G. Weihs
New J. Phys. 23, 093038 (2021)
https://doi.org/10.1088/1367-2630/ac2451 - Wave-Particle Duality of Many-Body Quantum States
C. Dittel, G. Dufour, G. Weihs, and A. Buchleitner
Phys. Rev. X 11, 031041 (2021)
https://doi.org/10.1103/PhysRevX.11.031041 - Understanding photoluminescence in semiconductor Bragg-reflection waveguides
S. Auchter, A. Schlager, H. Thiel, K. Laiho, B. Pressl, H. Suchomel, M. Kamp, S. Höfling, C. Schneider, and G. Weihs
Journal of Optics 23 (2021)
https://doi.org/10.1088/2040-8986/abd888 - Approaching the Tsirelson bound with a Sagnac source of polarization-entangled photons
S. Meraner, R. Chapman, S. Frick, R. Keil, M. Prilmüller, and G. Weihs
SciPost Physics 10, 017 (2021)
https://doi.org/10.21468/SciPostPhys.10.1.017