Institut für Theoretische Physik

Articles in journals with peer review

  1. Non-linear media in weakly curved spacetime: optical solitons and probe pulses for gravimetry,   Alessio Belenchia, Felix Spengler, Dennis Rätzel, Daniel Braun, New J. Phys. 26 083010 (2024);  arXiv:2402.09930
  2. Simultaneous minimal-noise estimation of noncommuting rotations of a spin, Jakub Czartowski, Karol Życzkowski, Daniel Braun, Quantum 8, 1341 (2024) arXiv:2303.08591
  3. Quantum parameter estimation with many-body fermionic systems and application to the Hall effect,  Olivier Giraud, Mark-Oliver Goerbig, Daniel Braun, SciPost Physics 16, 085 (2024); arXiv:2303.10199
  4. Optical solitons in curved spacetime, Felix Spengler, Alessio Belenchia, Dennis Rätzel, and Daniel Braun, Class. Quantum Grav. 40 145008 (2023); arXiv:2301.04986
  5. Principles of Quantum Functional Testing, Nadia Milazzo, Olivier Giraud, Giovanni Gramegna, and Daniel Braun, Phys. Rev. A 108, 022602 (2023); arXiv:2209.11712
  6. Superresolution imaging with multiparameter quantum metrology in passive remote sensing, Emre Köse and Daniel Braun, Phys. Rev. A 107, 032607 (2023); arXiv:2301.01557
  7. Benchmarking the performance of portfolio optimization with QAOA, Sebastian Brandhofer, Daniel Braun, Vanessa Dehn, Gerhard Hellstern, Matthias Hüls, Yanjun Ji, Ilia Polian, Amandeep Singh Bhatia, Thomas Wellens, Quantum Information Processing 22, article number: 25 (2023);  arXiv.2207.10555
  8. Quantifying Causal Influence in Quantum Mechanics, Llorenç Escolà, Daniel Braun, Phys. Rev. A 106, 062415 (2022);  arXiv:2105.08197
  9. Stochastic emulation of quantum algorithms, Daniel Braun, Ronny Müller, NJP 24, 023028 (2022); aiv:2109.0777
  10. Quantum-enhanced passive remote sensing, Emre Köse, Gerardo Adesso, and Daniel Braun, Phys. Rev. A 106, 012601 (2022); arXiv:2112.05455

  11. Influence of cosmological expansion in local experiments, Felix Spengler, Alessio Belenchia, Dennis Rätzel, Daniel Braun, Class. Quantum Grav. 39 055005 (2022); arXiv:2109.03280

  12. Perspectives of measuring gravitational effects of laser light and particle beams, Felix Spengler, Dennis Rätzel, Daniel Braun,  NJP 24, 053021 (2022);  arXiv:2104.09209v3

  13. Quantum-router: Storing and redirecting light at the photon level, Martin C. Korzeczek, Daniel Braun,Phys. Rev. A 104, 063714 (2021), arxiv:2003.03363

  14. Perfect quantum-state synchronization, Jakub Czartowski, Ronny Müller, Karol Życzkowski, and Daniel Braun, Phys. Rev. A 104, 012410; arXiv:2103.02031

  15. Symmetric multiqudit states: Stars, entanglement, and rotosensors, Chryssomalis Chryssomalakos, Louis Hanotel, Edgar Guzmán-González, Daniel Braun, Eduardo Serrano-Ensástiga, and Karol Życzkowski, Phys. Rev. A 104, 012407 (2021)

  16. Neural-Network Heuristics for Adaptive Bayesian Quantum Estimation, Lukas J. Fiderer, Jonas Schuff, and Daniel Braun, PRX Quantum 2, 020303 (2021)

  17. Optimal estimation of time-dependent gravitational fields with quantum optomechanical systems, Sofia Qvarfort, A. Douglas K. Plato, David Edward Bruschi, Fabienne Schneiter, Daniel Braun, Alessio Serafini, Dennis Rätzel, Phys. Rev. Research 3, 013159 (2021)

  18. Truncated moment sequences and a solution to the channel separability problem, N. Milazzo, D. Braun, and O. Giraud, Phys. Rev. A 102, 052406 (2020); arXiv:2006.15003

  19. Quantum parameter-estimation of frequency and damping of a harmonic-oscillator, Patrick Binder, Daniel Braun, Phys. Rev. A 102, 012223 (2020); arxiv:1905.08288

  20. Stoner-Wohlfarth switching of the condensate magnetization in a dipolar spinor gas and the metrology of excitation damping, Seong-Ho Shinn, Daniel Braun, Uwe R. Fischer, Phys. Rev. A 102, 013315 (2020); arxiv:2002.08723

  21. Optimal estimation with quantum optomechanical systems in the nonlinear regime, Fabienne Schneiter, Sofia Qvarfort, Alessio Serafini, André Xuereb, Daniel Braun, Dennis Rätzel, David Edward Bruschi, Phys. Rev. A 101, 033834 (2020); arXiv:1910.04485

  22. Majorana representation for mixed states,  Phys. Rev. A 101, 022332 (2020), E. Serrano-Ensástiga, D. Braun; arXiv: 1909.07740

  23. Improving the dynamics of quantum sensors with reinforcement learning,  New Journal of Physics 22, 035001 (2020), Jonas Schuff, Lukas J. Fiderer, Daniel Braun; arXiv:1908.08416

  24. Time-evolution of nonlinear optomechanical systems: Interplay of mechanical squeezing and non-Gaussianity,  J. Phys. A 53, 075304 (2020), Sofia Qvarfort, Alessio Serafini, André Xuereb, Daniel Braun, Dennis Rätzel, David Edward Bruschi; arXiv:1908.00790

  25. Maximal quantum Fisher information for mixed states, Phys. Rev. Lett. 123, 250502 (2019), Lukas J. Fiderer, Julien M. E. Fraïsse, Daniel Braun; arXiv:1905:06101

  26. Trade-off relations for operation entropy of complementary quantum channels, Jakub Czartowski, Daniel Braun, Karol Życzkowski, International Journal of Quantum Information, 17, 1950046 (2019); arXiv: 1908.03492

  27. Optimal measurement strategies for fast entanglement detection, N. Milazzo, D. Braun, O. Giraud, Phys. Rev. A 100, 012328  (2019); arXiv:1902.04803v1

  28. Rotation of polarization in the gravitational field of a laser beam - Faraday effect and optical activity, Fabienne Schneiter, Dennis Rätzel, Daniel Braun; Classical and Quantum Gravity, 36, 205007 (2019); arXiv:1812.04505
     
  29. The gravitational field of a laser beam beyond the short wavelength approximation, Classical and Quantum Gravity 35, 195007 (2018), Fabienne Schneiter, Dennis Rätzel, Daniel Braun; arXiv:1804.08706
  30. Quantum enhanced measurements without entanglement, Daniel Braun, Gerardo Adesso, Fabio Benatti, Roberto Floreanini, Ugo Marzolino, Morgan W. Mitchell, Stefano Pirandola, Rev. Mod. Phys. 90, 035006 (2018); arXiv:1701.05152
  31. Two-qubit causal structures and the geometry of positive qubit-maps, Jonas Kübler and Daniel Braun, New Journal of Physics 20, 083015 (2018);  arXiv:1803.00369

  32. Frequency spectrum of an optical resonator in a curved spacetime, Dennis Rätzel, Fabienne Schneiter, Daniel Braun, Tupac Bravo, Richard Howl, Maximilian P.E. Lock, Ivette Fuentes, New J. Phys. 20, 053046 (2018); arXiv:1711.11320

  33. Quantum metrology with a quantum-chaotic sensor, Lukas Fiderer and Daniel Braun, Nature Communications 9, 1351 (2018); arXiv:1803:00441

  34. Non-classical states of light with smooth P-function, François Damanet, Jonas Kübler, John Martin, Daniel Braun, Phys. Rev. A 97, 023832 (2018); arXiv:1712.01003

  35. Fourier-Correlation Imaging, Journal of Applied Physics 123, 074502 (2018); Daniel Braun, Younes Monjid, Bernard Rougé, Yann Kerr; arXiv:1705.03684
  36. Hamiltonian extensions in quantum metrology, Julien Mathieu Elias Fraïsse, Daniel Braun, Quantum Meas. Quantum Metrol. 4, 8–16 (2017); arXiv:1610.05974
  37. Entanglement and the truncated moment problem, Fabian Bohnet-Waldraff, Daniel Braun, Olivier Giraud, Phys. Rev. A 96, 032312 (2017); arXiv:1704.02277
  38. Intrinsic measurement errors for the speed of light in vacuum, Classical and Quantum Gravity 34, 175009 (2017), Daniel Braun, Fabienne Schneiter, and Uwe R. Fischer; arXiv:1502.04979
  39. Regularly Decomposable Tensors and Classical Spin States, COMMUN. MATH. SCI.
    15, 1651 (2017), Liqun Qi, Guofeng Zhang, Daniel Braun, Fabian Bohnet-Waldraff, Olivier Giraud, arXiv:1612.02638
  40. Enhancing sensitivity in quantum metrology by Hamiltonian extensions, Julien Mathieu Elias Fraisse, Daniel Braun, Phys. Rev. A 95, 062342, arXiv:1703.03476
  41. Entropic equality for worst-case work at any protocol speed, Oscar C O Dahlsten, Mahn-Soo Choi, Daniel Braun, Andrew J P Garner, Nicole Yunger Halpern, and Vlatko Vedral, New J. Phys. 19, 043013 (2017); arXiv:1504.05152
  42. Absolutely classical spin states, F. Bohnet-Waldraff, O. Giraud, D. Braun, Phys. Rev. A 95, 102318 (2017); arXiv:1611.06064
  43. Partial transpose criteria for symmetric states, Fabian Bohnet-Waldraff, Daniel Braun, Olivier Giraud, Phys. Rev. A 94, 042343 (2016); arXiv:1606.07635
  44. Quantum channel-estimation with particle loss: GHZ versus W states, Julien Mathieu Elias Fraïsse, Daniel Braun, Quantum Meas. Quantum Metrol. 3, 53–67 (2016) ; arXiv:1608.06221
  45. Tensor eigenvalues and entanglement of symmetric states, Fabian Bohnet-Waldraff, Daniel Braun, Olivier Giraud, Phys. Rev. A 94, 042324 (2016); arXiv:1608.03537
  46. Cooperative spontaneous emission from indistinguishable atoms in arbitrary motional quantum states, F. Damanet, D. Braun, J. Martin, Phys. Rev. A 94, 033838 (2016); arXiv:1606.05102v1
  47. Quantum-phase synchronization, Lukas J. Fiderer, Marek Kuś, Daniel Braun, Phys. Rev. A 94, 032336 (2016); arXiv:1511.04309
  48. Master equation for collective spontaneous emission with quantized atomic motion, François Damanet, Daniel Braun, John Martin, Phys. Rev. A 93, 022124 (2016); arXiv:1512.06676
  49. Quantumness of spin-1 states, Fabian Bohnet-Waldraff, Daniel Braun, Olivier Giraud, Phys. Rev. A 93, 012104 (2016); arxiv:1510.07848
  50. Generalization of the Van Cittert-Zernike theorem: observers moving with respect to sources, Daniel Braun, Younes Monjid, Bernard Rougé, Yann Kerr, Meas. Sci. Technol. 27 (2015) 015002, arXiv:1506.04764v1
  51. Coherent averaging, Julien Mathieu Elias Fraïsse and Daniel Braun, Ann. Phys. 527, 701-712 (2015); arXiv:1504.03214
  52. Tensor Representation of Spin States, O. Giraud, D. Braun, D. Baguette, T. Bastin, and J. Martin Phys. Rev. Lett. 114, 080401 (2015); arXiv:1409.1106
  53. Precision measurements with photon-subtracted or photon-added Gaussian state, Daniel Braun, Pu Jian, Olivier Pinel, Nicolas Treps, Phys. Rev. A 90, 013821 (2014); arXiv:1403.1397
  54. A heat bath can generate all classes of three-qubit entanglement, Christopher Eltschka, Daniel Braun, Jens Siewert, Phys. Rev. A 89, 062307 (2014); arXiv:1312.5733
  55. Precision Measurements of Temperature and Chemical Potential of Quantum Gases, Ugo Marzolino, Daniel Braun, Phys. Rev. A 88, 063609 (2013); arXiv:1308.2735
  56. Quantum parameter estimation using general single-mode Gaussian states Olivier Pinel, Pu Jian, Claude Fabre, Nicolas Treps, Daniel Braun, Phys. Rev. A 88, 040102(R) (2013); arXiv:1307.5318
  57. A universal set of qubit quantum channels, Daniel Braun, Olivier Giraud, Ion Nechita, Clement Pellegrini, Marko Znidaric, J. Phys. A: Math. Theor. 47 135302 (2014); arXiv:1306.0495
  58. Coherently enhanced measurements in classical mechanics, Daniel Braun, Sandu Popescu, Quantum Measurements and Quantum Metrology, 2, 44 (2014); arXiv:1305.1051
  59. Dynamically stabilized decoherence-free states in non-Markovian open fermionic systems, Heng-Na Xiong, Wei-Min Zhang, and Matisse Wei-Yuan Tu, Phys. Rev. A 86, 032107 (2012); arXiv:1207.1538
  60. Sub-shot noise sensitivities without entanglement, Fabio Benatti, Daniel Braun, Phys. Rev. A 87, 012340 (2013); arXiv:1109.0206
  61. Quantum Algorithm for Data Fitting, Nathan Wiebe, Daniel Braun, and Seth Lloyd, Phys. Rev. Lett. 109, 050505 (2012); arXiv:1204.5242; synopsis
  62. Parametrization of spin-1 classical state, Olivier Giraud, Petr Braun, Daniel Braun, Phys. Rev. A 85, 032101 (2012); arXiv:1110.0325
  63. Ultimate sensitivity of precision measurements with Gaussian quantum light: a multi-modal approach, Olivier Pinel, Julien Fade, Daniel Braun, Pu Jian, Nicolas Treps, Claude Fabre, Phys. Rev. A (Rapid Communications) 85, 010101 (2012); arXiv:1105.2644
  64. Exciton transfer dynamics and quantumness of energy transfer in the Fenna-Matthews-Olson complex, Peter Nalbach, Daniel Braun, and Michael Thorwart, Phys. Rev. E 84, 041926 (2011); arXiv:1104.2031
  65. Ultimate quantum bounds on mass measurements with a nano-mechanical oscillator, Daniel Braun, Eur. Phys. Lett. 94, 68007 (2011) arXiv:1009.5020
  66. Superradiance of cold atoms coupled to a superconducting circuit, Daniel Braun, Jonathan Hoffman, Eite Tiesinga, Phys. Rev. A 82, 022302 (2010), arXiv:1101.5300
  67. Heisenberg-limited sensitivity with decoherence-enhanced measurements, D. Braun and J. Martin, Nature Communications, 2, 223 (2011); arXiv:1005.4443
  68. Large effects of boundaries on spin amplification in spin chains, Benoit Roubert, Petr Braun, Daniel Braun, Phys. Rev. A 82, 022302 (2010);arXiv:1003.5863v2
  69. Multiqubit symmetric states with high geometric entanglement, J. Martin, O. Giraud, P. A. Braun, D. Braun, and T. Bastin, Phys. Rev. A 81, 062347 (2010); arXiv:1003.0593v1
  70. Quantifying Quantumness and the Quest for Queens of Quantum, Olivier Giraud, Petr A. Braun, Daniel Braun, New Journal of Physics 12, 063005, (2010); arXiv:1002.2158v1.
  71. Parameter estimation with mixed quantum states, Daniel Braun, Eur. Phys. J. D 59 3 (2010) 521-523; arXiv:1002.1323v1
  72. Versatile cold-atom simulator of non-Abelian gauge potentials, Daniel Braun, Phys. Rev. A82, 013617 (2010); arXiv:1002.1322v1
  73. Distribution of Interference in the Presence of Decoherence, L. Arnaud and D. Braun, Phys. Rev. A 80, 062329 (2009); arXiv:0910.1826v1
  74. Comment on ``Regional Versus Global Entanglement in Resonating-Valence-Bond States", F. Alet, D. Braun, and G. Misguich, Phys. Rev. Lett. 101, 248901 (2008); arXiv:0812.1932.
  75. Hardy's Test versus the CHSH Test of Quantum Non-Locality: Fundamental and Practical Aspects, D. Braun and M.-S. Choi, Phys. Rev. A 78, 032114 (2008), arXiv:0808.0052.
  76. Quantum Cloning without Interference, B. Roubert and D. Braun, Phys. Rev. A 78, 042311 (2008), arXiv:0807.1657.
  77. Efficiency of Producing Random Unitary Matrices with Quantum Circuits, L. Arnaud and D. Braun, Phys. Rev. A 78, 062329 (2008), arXiv:0807.0775v1.
  78. Classicality of spin states, O. Giraud, P. Braun, and D. Braun, Phys. Rev. A 78, 042112 (2008), arXiv:0805.2592.
  79. Interference versus success probability in quantum algorithms with imperfections, D. Braun and B. Georgeot, Phys. Rev. A 77, 022318 (2008); arXiv:0711.1513.
  80. Spontaneous emission from a two-level atom tunneling in a double-well potential, D. Braun and J. Martin, Phys. Rev. A 77, 032102 (2008), quant-ph/0707.4158.
  81. Role of interference in quantum state transfer through spin chains, A. O. Lyakhov, D. Braun, C. Bruder, Phys. Rev. A 76, 022321 (2007), cond-mat/0705.3777.
  82. Coherent control of atomic tunneling, J. Martin and D. Braun, J. Phys. B.: At. Mol. opt. Phys. 41, 115502 (2008), quant-ph/0704.0763.
  83. Distribution of interference in random quantum algorithms, L. Arnaud and D. Braun, Phys.Rev. A 75, 062314 (2007), quant-ph/0612168.
  84. Invariant integration over the orthogonal group, D. Braun, J. Phys. A: Math. Gen. 39 (2006) 14581-14590, math-ph/0607064.
  85. Indirect decoherence in optical lattices and cold atomic gases, D. Braun, Eur. Phys. J. D 42, 103 (2007), quant-ph/0606003.
  86. Decoherence in a system of many two-level atoms, D. Braun, Phys. Rev. Lett. 96, 230502 (2006), quant-ph/0511262.
  87. A quantitative measure of interference, D. Braun and B. Georgeot, Phys. Rev. A 73, 022314 (2006), quant-ph/0510159.
  88. Entanglement from thermal black body radiation, D. Braun, Phys.Rev.A 72, 062324 (2005), quant-ph/0505082.
  89. Exact activation energy of magnetic single domain particles, D.Braun, J.Magn.Mag.Mat. 283, 1-7, (2004), cond-mat/0705.3716.
  90. Universality of decoherence for macroscopic quantum superpositions, W.T.Strunz, F.Haake, and D.Braun, Phys.Rev.A 67, 022101 (2003); quant-ph/0204129.
  91. Effect of crystalline disorder on magnetic switching in small magnetic cells, D.Braun, J.Magn.Mag.Mater. 261, 295-303 (2003); cond-mat/0307593.
  92. Quantum chaos and quantum algorithms, D.Braun, Phys.Rev. A 65, 042317-1 (2002); quant-ph/0110037.
  93. Creation of Entanglement by Interaction with a Common Heat Bath, D.Braun, Phys.Rev.Lett. 89, 277901-1, (2002); quant-ph/0205019.
  94. Universality of Decoherence, D.Braun, F.Haake, W.T.Strunz; Phys.Rev.Lett. 86, 2913 (2001); quant-ph/0006117.
  95. Boundary conditions, the critical conductance distribution, and one-parameter scaling, D.Braun, E.Hofstetter, G.Montambaux, and A.MacKinnon, Phys.Rev.B 64 155107 (2001); cond-mat/0101122.
  96. Chaos in Dissipative Quantum Maps: A Wigner Function Description, D.Braun, Physica E 9, 498 (2001).
  97. Symmetrien verlängern das Leben von Schrödingers Kätzchen (English title: Symmetries extend the life of Schrödingers kitten, D.Braun, Physik in unserer Zeit 31, 246-251 (2000) (invited article).
  98. Quantum Computing Using Dissipation to Remain in a Decoherence-Free Subspace, A.Beige, D.Braun, B.Tregenna, and P.L.Knight, Phys.Rev.Lett. 85, 1762 (2000); quant-ph/0004043.
  99. Entangling Atoms and Ions in Dissipative Environments, A.Beige, S.Bose, D.Braun, S.F.Huelga, P.L.Knight, M.B.Plenio, and V.Vedral, J.Mod.Opt. 47, 2583 (2000); quant-ph/0007082.
  100. Driving Atoms into Decoherence Free States, A.Beige, D.Braun, and P.L.Knight, New Journal of Physics 2, 22 (September 2000); quant-ph/9912004. Selected as a NJP 10th anniverary highlight article.
  101. Dissipative Chaotic Quantum Maps: Expectation Values, Correlation Functions and the Invariant State, D.Braun, Eur.Phys.J.D 11, 3(2000); chao-dyn/9910009.
  102. Critical statistics in a power-law random-banded matrix ensemble, I.Varga and D.Braun, Phys.Rev.B 61, R11859 (2000); cond-mat/9909285.
  103. Long-lived Quantum Coherence between Macroscopically Distinct States in Superradiance, D.Braun, P.A.Braun, and F.Haake; Opt.Comm. 179, 195 (2000); quant-ph/9903040.
  104. Slow Decoherence of Superpositions of Macroscopically Distinct States, D.Braun, P.A.Braun, and F.Haake; Lecture Notes in Physics 538, 55 (2000), Proceedings of the 1998 Bielefeld Conference on ``Decoherence: Theoretical, Experimental, and Conceptual Problems''; quant-ph/9903041.
  105. Semiclassics for a Dissipative Quantum Map, D.Braun, P.A.Braun, and F.Haake, Physica D 131 265 - 292 (1999); chao-dyn/9804008.
  106. Spectral Properties of Dissipative Chaotic Quantum Maps, D.Braun, Chaos 9, 730-737 (1999); chao-dyn/9904002.
  107. Boundary Conditions at the Mobility Edge, D.Braun, G.Montambaux, and M.Pascaud, Phys.Rev.Lett. 81, 1062-1065 (1998); cond-mat/9712256.
  108. WKB for a Damped Spin, P.A.Braun, D.Braun and F.Haake, Europ.Phys.Journ.D 3, 1-8 (1998); chao-dyn/9805018.
  109. Semiclassical Spin Damping: Superradiance revisited, P.A.Braun, D.Braun, F.Haake, and J.Weber, Eur.Phys.J.D 2, 165-173 (1998); quant-ph/9803041.
  110. Log-normal Distribution of Level Curvatures in the Localized Regime: Analytical Verification, M.Titov, D.Braun, and Y.V.Fyodorov, J.Phys.A: Math.Gen. 30, L339-L345 (1997); cond-mat/9611235.
  111. Time-reversal Symmetry and Random Polynomials, D.Braun, M.Kuš, and K.Życzkowski, J.Phys.A Letters: Math.Gen. 30, L117-L123 (1997); chao-dyn/9611003.
  112. Level Curvatures and Conductances: A Numerical Study of the Thouless Relation, D.Braun, E.Hofstetter, G.Montambaux, and A.MacKinnon; Phys.Rev.B 55, 7557 (1997); cond-mat/9611059.
  113. Spectral correlations from the metal to the mobility edge, D.Braun and G.Montambaux, Phys.Rev.B 52, 13903 (1995); cond-mat/9506063.
  114. Universal spectral correlations in diffusive quantum systems, D.Braun and G.Montambaux, Phys.Rev.B 50, 7776 (1994); cond-mat/9404084.
  115. Magnetization of Disordered Ballistic Quantum Billards, D.Braun, Y.Gefen, and G.Montambaux, Ann.Physik 3, 467 (1994); cond-mat/9405022.
  116. Magnetic Response of Disordered Ballistic Quantum Dots, Y.Gefen, D.Braun, and G.Montambaux, Phys.Rev.Lett. 73, 154 (1994); cond-mat/9312079.
  117. Single Level Current and Curvature Distributions in Mesoscopic Systems, A.Kamenev, and D.Braun, J.Phys.I France 4, 1049 (1994); cond-mat/9310062.
  118. Rotational Tunneling and Librational Excitations: The Loss of Quantum Coherence, D.Braun and U.Weiss, proceedings of the 6th conference on ``Quantum Molecular Tunneling in Solids'', Physica B 202, 264, (1994).
  119. Dynamics of the Damped Rotational Tunneling System: The Effect of Librational Excitations, D.Braun, and U.Weiss, Z.Phys. B92, 507-517 (1993).