Blog

Stephanie Wehner

Room B204
S.D.C.Wehner@[TUD]
Management Assistant: Chantal Smith

Stephanie is Antoni van Leeuwenhoek Professor in quantum information. Her goal is to understand the world of small particles – the laws of quantum mechanics – in order to construct better networks and computers. Quantum bits behave quite differently than classical bits, and allow us to solve tasks that are provably impossible for any classical device.Stephanie’s research advances quantum information theory and its applications to both computer science and physics. She has worked extensively in quantum cryptography and communication, and one of her goals is to overcome the theoretical challenges in building large scale quantum networks. As part of the Quantum Internet Team at QuTech, she works with experimentalists in order to jointly realize this goal.

Stephanie is one the founders of QCRYPT, which has become the largest conference in quantum cryptography. She has written numerous scientific articles in both physics and computer science. From 2010 to 2014, her research group was located at the Centre for Quantum Technologies, National University of Singapore, where she was first Assistant and later Associate Professor. Previously, she was a postdoctoral scholar at the California Institute of Technology in the group of John Preskill. In a former life, she worked as a professional hacker in industry.

Curriculum Vitae (pdf)
Recent preprints
TedXDelft – Hacking Nature

Professional appointments
Steering Committee QCRYPT – Annual conference on quantum cryptography
Steering Committee QIP – Annual conference on theoretical quantum information
Steering Committee QCMC – Conference on quantum computing, measurement and communication


Publications

2017
Quantum preparation uncertainty and lack of information
Filip Rozpędek1
, Jędrzej Kaniewski2, Patrick Coles3 and Stephanie Wehner4
New Journal of Physics, February 2017
pdf

Entropic uncertainty relations and their applications
Patrick J. Coles, Mario Berta, Marco Tomamichel, and Stephanie Wehner
American Physical Society, Rev. Mod. Phys. 89, 015002 (2017)
pdf

2016
(Nearly) optimal P-values for all Bell inequalities
David Elkouss and Stephanie Wehner
Nature Partner Journal Quantum Information, 2, 16026 (2016)
pdf


A universal test for gravitational decoherence
C. Pfister, J. Kaniewski, M. Tomamichel, A. Mantri, R. Schmucker, N. McMahon, G. Milburn and S. Wehner
Nature Communications, 13022, October 2016
pdf

Loophole-free Bell test using electron spins in diamond: second experiment and additional analysis
B. Hensen, N. Kalb, M.S. Blok, A. Dréau, A. Reiserer, R.F.L. Vermeulen, R.N. Schouten, M. Markham, D.J. Twitchen, K. Goodenough, D. Elkouss, S. Wehner, T. H. Taminiau, R. Hanson
Scientific Reports 6:30289, 2016
pdf

Relative thermalization
Lídia del Rio, Adrian Hutter, Renato Renner, and Stephanie Wehner
Phys. Rev. E 94, 022104
pdf

Contextuality without nonlocality in a superconducting quantum system
Markus Jerger, Yarema Reshitnyk, Markus Oppliger, Anton Potočnik, Mintu Mondal, Andreas Wallraff, Kenneth Goodenough, Stephanie Wehner, Kristinn Juliusson, Nathan K. Langford& Arkady Fedorov
Nature Communications, 12930, July 2016
pdf

Entropic uncertainty and measurement reversibility
Mario Berta, Stephanie Wehner and Mark M Wilde
New Journal of Physics, Volume 18, June 2016
pdf


Assessing the performance of quantum repeaters for all phase-insensitive Gaussian bosonic channels
K Goodenough, D Elkouss and S Wehner 
New Journal of Physics, Volume 18, June 2016
pdf


Device-independent two-party cryptography secure against sequential attacks
Jędrzej Kaniewski and Stephanie Wehner
New Journal of Physics, Volume 18, May 2016
pdf


Sifting attacks in finite-size quantum key distribution
Corsin Pfister, Norbert Lütkenhaus, Stephanie Wehner and Patrick J Coles
New Journal of Physics, Volume 18, May 2016
pdf


Asynchronous reference frame agreement in a quantum network
Tanvirul Islam and Stephanie Wehner
New Journal of Physics, Volume 18, March 2016
pdf


To see the world in a grain of spins
Stephanie Wehner
Science 11 Mar 2016
pdf

2015
Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres

Bas Hensen, H Bernien, AE Dréau, A Reiserer, N Kalb, MS Blok, J Ruitenberg, RFL Vermeulen, RN Schouten, C Abellán, W Amaya, V Pruneri, Morgan W Mitchell, M Markham, DJ Twitchen, D Elkouss, S Wehner, TH Taminiau, R Hanson
Nature 526 (7575), 682-686
pdf

Limits to catalysis in quantum thermodynamics
NHY Ng, C Cirstoiu, J Eisert, S Wehner
New Journal of Physics 17 (8), 085004
pdf

Practical relativistic bit commitment
Tommaso Lunghi, Jędrzej Kaniewski, Felix Bussières, Raphael Houlmann, Marco Tomamichel, Stephanie Wehner, Hugo Zbinden
Physical review letters 115 (3), 030502
pdf

The second laws of quantum thermodynamics
F Brandão, M Horodecki, N Ng, J Oppenheim, S Wehner
Proceedings of the National Academy of Sciences 112 (11), 3275-3279
pdf

Entanglement sampling and applications
F Dupuis, O Fawzi, S Wehner
Information Theory, IEEE Transactions on 61 (2), 1093-1112

2014
Entanglement-assisted guessing of complementary measurement outcomes
M Berta, PJ Coles, S Wehner
Physical Review A 90 (6), 062127
pdf

Equivalence of wave–particle duality to entropic uncertainty
PJ Coles, J Kaniewski, S Wehner
Nature communications 5
pdf

Finite blocklength converse bounds for quantum channels
W Matthews, S Wehner
Information Theory, IEEE Transactions on 60 (11), 7317-7329
pdf

A unified view on Hardyʼs paradox and the Clauser–Horne–Shimony–Holt inequality
L Mančinska, S Wehner
Journal of Physics A: Mathematical and Theoretical 47 (42), 424027
pdf

Entropic uncertainty from effective anticommutators
J Kaniewski, M Tomamichel, S Wehner
Physical Review A 90 (1), 012332
pdf

Publisher’s Note: Bell nonlocality [Rev. Mod. Phys. 86, 419 (2014)]
N Brunner, D Cavalcanti, S Pironio, V Scarani, S Wehner
Reviews of Modern Physics 86 (2), 839
pdf

Spatial reference frame agreement in quantum networks
T Islam, L Magnin, B Sorg, S Wehner
New Journal of Physics 16 (6), 063040
pdf

Bell nonlocality
N Brunner, D Cavalcanti, S Pironio, V Scarani, S Wehner
Reviews of Modern Physics 86 (2), 419
pdf

An experimental implementation of oblivious transfer in the noisy storage model
C Erven, N Ng, N Gigov, R Laflamme, S Wehner, G Weihs
Nature communications 5
pdf

2013
Experimental bit commitment based on quantum communication and special relativity
Tommaso Lunghi, J Kaniewski, Félix Bussieres, Raphaël Houlmann, M Tomamichel, A Kent, Nicolas Gisin, S Wehner, Hugo Zbinden
Physical review letters 111 (18), 180504
pdf

A monogamy-of-entanglement game with applications to device-independent quantum cryptography
M Tomamichel, S Fehr, J Kaniewski, S Wehner
New Journal of Physics 15 (10), 103002
pdf

Entanglement cost of quantum channels
M Berta, FGSL Brandao, M Christandl, S Wehner
Information Theory, IEEE Transactions on 59 (10), 6779-6795
pdf

Achieving the limits of the noisy-storage model using entanglement sampling
F Dupuis, O Fawzi, S Wehner
Advances in Cryptology–CRYPTO 2013, 326-343
pdf

Secure bit commitment from relativistic constraints
J Kaniewski, M Tomamichel, E Hanggi, S Wehner
Information Theory, IEEE Transactions on 59 (7), 4687-4699
pdf

An information-theoretic principle implies that any discrete physical theory is classical
C Pfister, S Wehner
Nature communications 4, 1851
pdf

Dependence of a quantum-mechanical system on its own initial state and the initial state of the environment it interacts with
A Hutter, S Wehner
Physical Review A 87 (1), 012121
pdf

A violation of the uncertainty principle implies a violation of the second law of thermodynamics
E Haenggi, S Wehner
Nature Communications 4, 1670
pdf

2012
Experimental implementation of bit commitment in the noisy-storage model
NHY Ng, SK Joshi, CC Ming, C Kurtsiefer, S Wehner
Nature communications 3, 1326

Min-entropy uncertainty relation for finite-size cryptography
NHY Ng, M Berta, S Wehner
Physical Review A 86 (4), 042315

Computability limits nonlocal correlations
T Islam, S Wehner
Physical Review A 86 (4), 042109

Quantum to classical randomness extractors
M Berta, O Fawzi, S Wehner
Advances in Cryptology–CRYPTO 2012, 776-793

Multipartite entanglement verification resistant against dishonest parties
A Pappa, A Chailloux, S Wehner, E Diamanti, I Kerenidis
Physical review letters 108 (26), 260502

Long distance quantum cryptography made simple
I Kerenidis, S Wehner
Quantum Information & Computation 12 (5-6), 448-460

Unconditional security from noisy quantum storage
R Koenig, S Wehner, J Wullschleger
Information Theory, IEEE Transactions on 58 (3), 1962-1984

Almost all quantum states have low entropy rates for any coupling to the environment
A Hutter, S Wehner
Physical review letters 108 (7), 070501

2011
A time-dependent Tsirelson’s bound from limits on the rate of information gain in quantum systems
AC Doherty, S Wehner
New Journal of Physics 13 (7), 073033

Does ignorance of the whole imply ignorance of the parts? Large violations of noncontextuality in quantum theory
T Vidick, S Wehner
Physical review letters 107 (3), 030402

More nonlocality with less entanglement
T Vidick, S Wehner
Physical Review A 83 (5), 052310

Achieving the physical limits of the bounded-storage model
P Mandayam, S Wehner
Physical Review A 83 (2), 022329

2010
The uncertainty principle determines the nonlocality of quantum mechanics
J Oppenheim, S Wehner
Science 330 (6007), 1072-1074

Using postmeasurement information in state discrimination
D Gopal, S Wehner
Physical Review A 82 (2), 022326

A transform of complementary aspects with applications to entropic uncertainty relations
P Mandayam, S Wehner, N Balachandran
Journal of Mathematical Physics 51 (8), 082201

Implementation of two-party protocols in the noisy-storage model
S Wehner, M Curty, C Schaffner, HK Kwong Lo
Physical Review A 81 (5), 052336

Local quantum measurement and no-signaling imply quantum correlations
H Barnum, S Beigi, S Boixo, MB Elliott, S Wehner
Physical review letters 104 (14), 140401

Entropy in general physical theories
AJ Short, S Wehner
New Journal of Physics 12 (3), 033023

Entropic uncertainty relations—a survey
S Wehner, A Winter
New Journal of Physics 12 (2), 025009

2009
Distinguishability of quantum states under restricted families of measurements with an application to quantum data hiding
W Matthews, S Wehner, A Winter
Communications in Mathematical Physics 291 (3), 813-843

A strong converse for classical channel coding using entangled inputs
R Koenig, S Wehner
Physical Review Letters 103 (7), 070504

Relaxed uncertainty relations and information processing
G Ver Steeg, S Wehner Quantum Information and Computation 9, 0801-0832

2008
Lower bound on the dimension of a quantum system given measured data
S Wehner, M Christandl, AC Doherty
Physical Review A 78 (6), 062112

State discrimination with post-measurement information
MA Ballester, S Wehner, A Winter
Information Theory, IEEE Transactions on 54 (9), 4183-4198

Possibility, impossibility, and cheat sensitivity of quantum-bit string commitment
H Buhrman, M Christandl, P Hayden, HK Lo, S Wehner
Physical Review A 78 (2), 022316

Composable security in the bounded-quantum-storage model
S Wehner, J Wullschleger
Automata, Languages and Programming, 604-615

The quantum moment problem and bounds on entangled multi-prover games
AC Doherty, YC Liang, B Toner, S Wehner
Computational Complexity, 2008. CCC’08.

Cryptography from noisy storage
S Wehner, C Schaffner, BM Terhal
Physical Review Letters 100 (22), 220502

Higher entropic uncertainty relations for anti-commuting observables
S Wehner, A Winter
Journal of Mathematical Physics 49 (6), 062105

2007
Simple family of nonadditive quantum codes

JA Smolin, G Smith, S Wehner
Physical review letters 99 (13), 130505

Entropic uncertainty relations and locking: tight bounds for mutually unbiased bases
MA Ballester, S Wehner
Physical Review A 75 (2), 022319

Analyzing worms and network traffic using compression
S Wehner
Journal of Computer Security 15 (3), 303-320

2006
Security of quantum bit string commitment depends on the information measure

H Buhrman, M Christandl, P Hayden, HK Lo, S Wehner
Physical review letters 97 (25), 250501

Implications of superstrong non-locality for cryptography
H Buhrman, M Christandl, F Unger, S Wehner, A Winter
Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences

Entanglement in interactive proof systems with binary answers
S Wehner
STACS 2006, 162-171

Tsirelson bounds for generalized clauser-horne-shimony-holt inequalities
S Wehner
Physical Review A 73 (2), 022110

2005
Improved lower bounds for locally decodable codes and private information retrieval

S Wehner, R De Wolf
Automata, Languages and Programming, 1424-1436

Quantum anonymous transmissions
M Christandl, S Wehner
ASIACRYPT, 217-235

2004
Quantum computation and privacy

S Wehner
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.10.822


Preprints

2015
Assessing the performance of quantum repeaters for all phase-insensitive Gaussian bosonic channels
K Goodenough, D Elkouss, S Wehner
arXiv:1511.08710
pdf

Entropic uncertainty relations and their applications
PJ Coles, M Berta, M Tomamichel, S Wehner
arXiv:1511.04857
pdf

Entanglement Cost of Quantum Channels
Berta, S Wehner, MM Wilde
arXiv:1511.00267
pdf

(Nearly) optimal P-values for all Bell inequalities
D Elkouss, S Wehner
arXiv:1510.07233
pdf

Continuous-Variable Protocols in the Noisy-Storage Model
F Furrer, C Schaffner, S Wehner
arXiv:1509.09123
pdf

Work and reversibility in quantum thermodynamics
S Wehner, MM Wilde, MP Woods
arXiv:1506.08145
pdf

Sifting attacks in finite-size quantum key distribution
C Pfister, PJ Coles, S Wehner, N Lütkenhaus
arXiv:1506.07502
pdf

The maximum efficiency of nano heat engines depends on more than temperature
MP Woods, N Ng, S Wehner
arXiv:1506.02322
pdf

Asynchronous reference frame agreement in a quantum network
T Islam, S Wehner
arXiv:1505.02565
pdf

Understanding nature from experimental observations: a theory independent test for gravitational decoherence
C Pfister, J Kaniewski, M Tomamichel, A Mantri, R Schmucker, N McMahon, G Milburn, S Wehner
arXiv:1503.00577
pdf

2014
Relative thermalization

L del Rio, A Hutter, R Renner, S Wehner
arXiv:1401.7997
pdf

2013
Entanglement improves classical control
DN Truong, M McKague, S Wehner
arXiv:1307.1569
pdf

An equality between entanglement and uncertainty
M Berta, PJ Coles, S Wehner
arXiv:1302.5902
pdf

2012
Convergence of SDP hierarchies for polynomial optimization on the hypersphere
AC Doherty, S Wehner
arXiv:1210.5048
pdf

2009
Unconditional security from noisy quantum storage

R Koenig, S Wehner, J Wullschleger
arXiv:0906.1030
pdf


2008

Robust cryptography in the noisy-quantum-storage model

C Schaffner, B Terhal, S Wehner
arXiv:0807.1333
pdf

Cryptography in a quantum world
S Wehner
arXiv:0806.3483
pdf