Valerio Scarani
Principal Investigator
+65 6516 2813
Valerio Scarani

Short bio

Valerio Scarani joined NUS and CQT in 2007. He was born in Milan, Italy, in 1972. At the moment of choosing his university degree, he opted for physics with the grand dream of understanding the world. After graduating from Ecole Polytechnique Federale de Lausanne (EPFL) in 1996, he heard about the birth of quantum information science, but the complexities of life led him to a pragmatic PhD thesis in the same university. So he spent the next four years of his life detecting insanely broad NMR spectra from magnetic nanostructures. He was lucky enough to be given a second chance in the year 2000, when Nicolas Gisin offered him a postdoc at the University of Geneva, to work on theoretical quantum information. His luck persists to this day.




  • S. Nimmrichter, J. Dai, A.Roulet, V. Scarani. (2017). Quantum and classical dynamics of a three-mode absorption refrigerator. Quantum 1 37
  • Wan Cong, Y. Cai, Jean-Daniel Bancal, V. Scarani. (2017). Irreducible dimension witness. Phys. Rev. Lett. 119 080401
  • H.S. Poh, A. Cere, J.D. Bancal, Y. Cai, Nicolas Sangouard, V. Scarani, C. Kurtsiefer. (2017). Experimental many-pairs nonlocality. Phys. Rev. A 96 022101
  • A.Roulet, S. Nimmrichter, J.M. Arrazola, S. Seah, V. Scarani. (2017). Autonomous rotor heat engine. Phys. Rev. E 95 062131
  • Andrea Coladangelo, K.T. Goh, V. Scarani. (2017). All Pure Bipartite Entangled States can be Self-Tested. Nature Communications 8 15485
  • A. Shu, J. Dai, V. Scarani. (2017). The power of an optical Maxwell demon. Phys. Rev. A 95 022123
  • J.M. Arrazola, V. Scarani. (2016). Covert quantum communication. Phys. Rev. Lett. 117 250503
  • A.Roulet, V. Scarani. (2016). Solving the scattering of N photons on a two-level atom without computation. New J. Phys. 18 093035
  • Ernest Y.-Z. Tan, Y. Cai, V. Scarani. (2016). Measurement-dependent locality beyond independent and identically distributed runs. Phys. Rev. A 94 032117
  • Yi-Zheng Zhen, K.T. Goh, Yu-Lin Zheng, Wenfei Cao, X. Wu, Kai Chen, V. Scarani. (2016). Non-local games and optimal steering at the boundary of the quantum set. Phys. Rev. A 94 022116
  • Y. Cai, J.D. Bancal, Jacquiline Romero, V. Scarani. (2016). A new device-independent dimension witness and its experimental implementation. J. Phys. A: Math. Theor. 49 305301
  • X. Wu, J.D. Bancal, Matthew McKague, V. Scarani. (2016). Device-independent parallel self-testing of two singlets. Phys. Rev. A 93 062121
  • K.T. Goh, J.D. Bancal, V. Scarani. (2016). Measurement-device-independent quantification of entanglement for given Hilbert space dimension. New J. Phys. 18 045022
  • Roman Schmied, J.D. Bancal, Baptiste Allard, Matteo Fadel, V. Scarani, Philipp Treutlein, Nicolas Sangouard. (2016). Bell Correlations in a Bose-Einstein Condensate. Science 352 441
  • A.Roulet, Le Huy Nguyen, V. Scarani. (2016). Two photons on an atomic beam splitter: Nonlinear scattering and induced correlations. Phys. Rev. A 93 033838
  • T.P. Le, Gonzalo de la Torre, J.D. Bancal, Stefano Pironio, V. Scarani. (2016). Randomness in post-selected data. New J. Phys. 18 035007
  • W.Yukun, X. Wu, V. Scarani. (2016). All the self-testings of the singlet for two binary measurements. New J. Phys. 18 025021
  • Pierre-Olivier Guimond, A.Roulet, Le Huy Nguyen, V. Scarani. (2016). Rabi oscillation in a quantum cavity: Markovian and non-Markovian dynamics. Phys. Rev. A 93 023808
  • J. Dai, A.Roulet, Le Huy Nguyen, V. Scarani. (2015). Rectification of light in the quantum regime. Phys. Rev. A 92 063848
  • Y. Cai, Le Huy Nguyen, V. Scarani. (2015). State complexity and quantum computation. Ann. Phys. 527 684
  • J.D. Bancal, Miguel Navascues, V. Scarani, Tamas Vertesi, T.H. Yang. (2015). Physical characterization of quantum devices from nonlocal correlations. Phys. Rev. A 91 022115
  • J.D. Bancal, V. Scarani. (2014). More randomness from noisy sources. Proceedings of TQC 27 1
  • V. Scarani, C. Kurtsiefer. (2014). The black paper of quantum cryptography: Real implementation problems. Theoretical Computer Science 560 27-32
  • A.Roulet, Z.W. Teo, Le Huy Nguyen, V. Scarani. (2014). Proposal for Monitoring and Heralding Position States of Atoms in a One-Dimensional Waveguide. Phys. Rev. A 90 053821
  • X. Wu, Y. Cai, T.H. Yang, Le Huy Nguyen, J.D. Bancal, V. Scarani. (2014). Robust self testing of the 3-qubit W state. Phys. Rev. A 90 042339
  • Y. Z. Law, T.P. Le, J.D. Bancal, V. Scarani. (2014). Quantum randomness extraction for various levels of characterization of the devices. J. Phys. A: Math. Theor. 47 424028
  • T.H. Yang, Tamas Vertesi, J.D. Bancal, V. Scarani, Miguel Navascues. (2014). Robust and versatile black-box certification of quantum devices. Phys. Rev. Lett. 113 040401
  • Le Huy Nguyen, Y. Cai, X. Wu, Rafael Rabelo, V. Scarani. (2014). Maximal tree size of few-qubit states. Phys. Rev. A 89 062333
  • V. Scarani, J.D. Bancal, Antoine Suarez, Nicolas Gisin. (2014). Strong constraints on models that explain the violation of Bell inequalities with hidden superluminal influences. Found. Phys. 44 523
  • Nicolas Brunner, D. Cavalcanti, Stefano Pironio, V. Scarani, S. Wehner. (2014). Bell nonlocality. Rev. Mod. Phys. 86 419
  • J.D. Bancal, L. Sheridan, V. Scarani. (2014). More Randomness from the Same Data. New J. Phys. 16 033011
  • Melvyn Ho, J.D. Bancal, V. Scarani. (2014). Device-independent certification of the teleportation of a qubit. Phys. Rev. A 88 052318
  • Z.W. Teo, J. Minar, D. Cavalcanti, V. Scarani. (2013). Improved analysis of a proposal for a realistic loophole-free Bell test with atom-light entanglement. Phys. Rev. A 88 053848
  • Nicolas Gisin, Sandu Popescu, V. Scarani, Stefan Wolf, Jürg Wullschleger. (2013). Oblivious transfer and quantum channels as communication resources. Natural Computing 12 13-17
  • S.A. Aljunid, G. Maslennikov, Y. Wang, H.L. Dao, V. Scarani, C. Kurtsiefer. (2013). Excitation of a single atom with exponentially rising light pulses. Phys. Rev. Lett. 111 103001
  • Le Huy Nguyen, Y. Cai, X. Wu, V. Scarani. (2013). Tree-size complexity of multiqubit states. Phys. Rev. A 88 012321
  • Z.W. Teo, Mateus Araujo, Marco Tulio Quintino, J. Minar, D. Cavalcanti, V. Scarani, Marcelo Terra Cunha, Marcelo Franca Santos. (2013). Realistic loophole-free Bell test with atom-photon entanglement. Nature Communications 4 2104
  • T.P. Le, L. Sheridan, V. Scarani. (2013). Bell tests with min-entropy sources. Phys. Rev. A 87 062121
  • A. Martin, F. Kaiser, A. Vernier, A. Beveratos, V. Scarani, S. Tanzilli. (2013). Cross time-bin photonic entanglement for quantum key distribution. Phys. Rev. A (R) 87 020301
  • V. Scarani. (2012). The device-independent outlook on quantum physics (lecture notes on Bell inequalities). Acta Physica Slovaca 62 347
  • M.E. McKague, T.H. Yang, V. Scarani. (2012). Robust Self Testing of the Singlet. J. Phys. A: Math. Gen. 45 455304
  • J.D. Bancal, Stefano Pironio, Antonio Acin, Yeong-Cherng Liang, V. Scarani, Nicolas Gisin. (2012). Quantum nonlocality based on finite-speed causal influences leads to superluminal signaling. Nature Physics 8 867
  • R. Rabelo, Y. Z. Law, V. Scarani. (2012). Device-independent bounds for Hardy. Phys. Rev. Lett. 109 180401
  • D. Koh, Michael J. W. Hall, Setiawan, James E. Pope, Chiara Marletto, A. Kay, V. Scarani. (2012). The effects of reduced "free will" on Bell-based randomness expansion. Phys. Rev. Lett. 109 160404
  • Y. Wang, J. Minar, V. Scarani. (2012). State-dependent atomic excitation by multi-photon pulses propagating along two spatial modes. Phys. Rev. A 86 023811
  • T.P. Le, L. Sheridan, V. Scarani. (2012). Tomographic Quantum Cryptography Protocols are Reference Frame Independent. Int. J. Quant. Info. 10 1250035
  • G. Romero, D. Ballester, Y. Wang, V. Scarani, E. Solano. (2012). Ultrafast Quantum Gates in Circuit QED. Phys. Rev. Lett. 108 120501
  • Y. Wang, D. Ballester, G. Romero, V. Scarani, E. Solano. (2012). Validity of resonant two-qubit gates in the ultrastrong coupling regime of circuit QED. Physica Scripta T147 014031
  • T.H. Yang, D. Cavalcanti, M. Almeida, Z.W. Teo, V. Scarani. (2012). Information Causality and Extremal Tripartite Correlations. New J. Phys. 14 013061
  • D. Cavalcanti, R. Rabelo, V. Scarani. (2012). Nonlocality tests enhanced by a third observer. Phys. Rev. Lett. 108 040402
  • Y. Wang, J. Minar, Gabriel Hetet, V. Scarani. (2012). Quantum memory with a single two-level atom in a half cavity. Phys. Rev. A 85 013823
  • Cyril Branciard, Eric G. Cavalcanti, Stephen P. Walborn, V. Scarani, Howard M. Wiseman. (2012). One-sided Device-Independent Quantum Key Distribution: Security, feasability and the connection with steering. Phys. Rev. A (R) 85 010301
  • Luca Chirolli, Vittorio Giovannetti, R. Fazio, V. Scarani. (2011). Time-bin entanglement of quasi-particles in semiconductor devices. Phys. Rev. B 84 195307
  • I. Gerhardt, Qin Liu, A. Lamas-Linares, Johannes Skaar, V. Scarani, Vadim Makarov, C. Kurtsiefer. (2011). Experimentally faking the violation of Bell. Phys. Rev. Lett. 107 170404
  • R. Rabelo, Melvyn Ho, D. Cavalcanti, Nicolas Brunner, V. Scarani. (2011). Device-independent certification of entangled measurements. Phys. Rev. Lett. 107 050502
  • D. Cavalcanti, Nicolas Brunner, Paul Skrzypczyk, Alejo Salles, V. Scarani. (2011). Large violation of Bell inequalities using both particle and wave measurements. Phys. Rev. A 84 022105
  • Z.W. Teo, V. Scarani. (2011). Lenses as an Atom-Photon Interface: A Semiclassical Model. Optics Comm. 284 4485
  • Y. Wang, J. Minar, L. Sheridan, V. Scarani. (2011). Efficient excitation of a two level atom by a single photon in a propagating mode. Phys. Rev. A 83 063842
  • D. Cavalcanti, V. Scarani. (2011). Comment on "Loophole-free Bell test for continuous variables via wave and particle correlations (Phys. Rev. Lett. 105, 170404 (2010))". Phys. Rev. Lett. 106 208901
  • Stefano Pironio, Jean-Daniel Bancal, V. Scarani. (2011). Extremal correlations of the tripartite no-signaling polytope. J. Phys. A: Math. Theor. 44 065303
  • T.H. Yang, Miguel Navascues, L. Sheridan, V. Scarani. (2011). Quantum Bell Inequalities from Macroscopic Locality. Phys. Rev. A 83 022105
  • D. Cavalcanti, M. Almeida, V. Scarani, Antonio Acín. (2011). Quantum networks reveal quantum nonlocality. Nature Communications 184 2
  • M. Fitzi, E. Hänggi, V. Scarani, S. Wolf. (2010). The non-locality of n noisy Popescu-Rohrlich boxes. J. Phys. A: Math. Theor. 43 465305
  • L. Sheridan, T.P. Le, V. Scarani. (2010). Finite-key security against coherent attacks in quantum key distribution. New J. Phys. 12 123019
  • D. Cavalcanti, A. Salles, V. Scarani. (2010). Macroscopically local correlations can violate information causality. Nature Communications 1 136
  • C. Branciard, N. Gisin, V. Scarani. (2010). Local content of bipartite qubit correlations. Phys. Rev. A 81 022103
  • M. Almeida, D. Cavalcanti, V. Scarani, A. Acín. (2010). Multipartite fully nonlocal quantum states. Phys. Rev. A 81 052111
  • A. Laing, V. Scarani, J.G. Rarity, J.L. O'Brien. (2010). Reference frame independent quantum key distribution. Phys. Rev. A 82 012304
  • C. Branciard, H. Zhu, L. Chen, V. Scarani. (2010). Evaluation of two different entanglement measures on a bound entangled state. Phys. Rev. A 82 012327
  • L. Sheridan, V. Scarani. (2010). Security proof for quantum key distribution using qudit systems. Phys. Rev. A (R) 82 030301
  • S. Pironio, A. Acin, N. Brunner, N. Gisin, S. Massar, V. Scarani. (2009). Device-independent quantum key distribution secure against collective attacks. New J. Phys. 11 045021
  • M.K. Tey, G. Maslennikov, T.C.H. Liew, S.A. Aljunid, F. Huber, B. Chng, Z. Chen, V. Scarani, C. Kurtsiefer. (2009). Interfacing light and single atoms with a lens. New J. Phys. 11 043011
  • R.Y.Q. Cai, V. Scarani. (2009). Finite-key analysis for practical implementations of quantum key distribution. New J. Phys. 11 045024
  • V. Scarani, H. Bechmann-Pasquinucci, N.J. Cerf, M. Dusek, N. Lutkenhaus, M. Peev. (2009). The security of practical quantum key distribution. Rev. Mod. Phys. 81 1301-1350
  • S.A. Aljunid, M.K. Tey, B. Chng, T.C.H. Liew, G. Maslennikov, V. Scarani, C. Kurtsiefer. (2009). Phase shift of a weak coherent beam induced by a single atom. Phys. Rev. Lett. 103 153601
  • J. Allcock, N. Brunner, M. Pawlowski, V. Scarani. (2009). Recovering part of the quantum boundary from information causality. Phys. Rev. A (R) 80 040103
  • M. Pawlowski, T. Paterek, D. Kaszlikowski, V. Scarani, A. Winter, M. Zukowski. (2009). Information causality as a physical principle. Nature 461 1101-1104
  • C.E. Bardyn, M.E. McKague, S. Massar, V. Scarani. (2009). Device independent state estimation based on Bell. Phys. Rev. A 80 062327
  • Matthias Fitzi, E. Hänggi, V. Scarani, Stefan Wolf. (2008). How non-local are n noisy Popescu-Rohrlich machines?. QCMC
  • V. Scarani, R. Renner. (2008). Security Bounds for Quantum Cryptography with Finite Resources. Proceedings of TQC 5106 83-95
  • C. Branciard, N. Brunner, N. Gisin, C. Kurtsiefer, A. Lamas-Linares, A. Ling, V. Scarani. (2008). Testing quantum correlations versus single-particle properties within Leggett\'s model and beyond. Nature Physics 4 681-685
  • V. Scarani, R. Renner. (2008). Quantum cryptography with finite resources: Unconditional security bound for discrete-variable protocols with one-way post-processing. Phys. Rev. Lett. 100 200501
  • N. Brunner, N. Gisin, S. Popescu, V. Scarani. (2008). Simulation of partial entanglement with nonsignaling resources. Phys. Rev. A 78 052111
  • A. Ling, M.P. Peloso, I. Marcikic, V. Scarani, A. Lamas-Linares, C. Kurtsiefer. (2008). Experimental quantum key distribution based on a Bell test. Phys. Rev. A 78 020301
  • N. Brunner, S. Pironio, A. Acin, N. Gisin, A.A. Methot, V. Scarani. (2008). Testing the dimension of Hilbert spaces. Phys. Rev. Lett. 100 210503
  • V. Scarani. (2008). Local and nonlocal content of bipartite qubit and qutrit correlations. Phys. Rev. A 77 042112
  • C. Branciard, N. Gisin, V. Scarani. (2008). Upper Bounds for the Security of two Distributed-Phase Reference Protocols of Quantum Cryptography. New J. Phys. 10 013031
  • C. Branciard, A. Ling, N. Gisin, C. Kurtsiefer, A. Lamas-Linares, V. Scarani. (2007). Experimental Falsification of Leggett\'s Non-Local Variable Model. Phys. Rev. Lett. 99 210407
  • Fei Gao, V. Scarani, Yuqian Zhou, Yu Cai, Jean-Daniel Bancal. Many-box locality. Phys. Rev. A