474 citations · 2k across the 28 of their papers we have counts for
28 papers
Hardware-Efficient Preparation of Graph States on Near-Term Quantum Computers
Sebastian Brandhofer, Ilia Polian, Stefanie Barz +1
Highly entangled quantum states are an ingredient in numerous applications in quantum computing. However, preparing these highly entangled quantum states on currently available qua…
Heralding Higher-Dimensional Bell and Greenberger-Horne-Zeilinger States Using Multiport Splitters
Daniel Bhatti, Stefanie Barz
One of the most important resources for quantum optical experiments and applications are on-demand highly entangled multiphoton quantum states. A promising way of generating them i…
Boosted quantum teleportation
Simone E. D'Aurelio, Matthias J. Bayerbach, Stefanie Barz
Quantum teleportation has proven to be fundamental for many quantum information and communication processes. The core concept can be exploited in many tasks, from the transmission…
Non-adaptive measurement-based quantum computation on IBM Q
Jelena Mackeprang, Daniel Bhatti, Stefanie Barz
We test the quantumness of IBM's quantum computer IBM Quantum System One in Ehningen, Germany. We generate generalised n-qubit GHZ states and measure Bell inequalities to investiga…
Generating Greenberger-Horne-Zeilinger states using multiport splitters
Daniel Bhatti, Stefanie Barz
Symmetric multiport splitters are versatile tools in optical quantum information processing. They can be used for studying multiparticle scattering, studying distinguishability and…
Experimental entanglement generation using multiport beam splitters
Shreya Kumar, Daniel Bhatti, Alex E. Jones +1
Multi-photon entanglement plays a central role in optical quantum technologies. One way to entangle two photons is to prepare them in orthogonal internal states, for example, in tw…
Bell-state measurement exceeding 50% success probability with linear optics
Matthias J. Bayerbach, Simone E. D'Aurelio, Peter van Loock +1
Bell-state projections serve as a fundamental basis for most quantum communication and computing protocols today. However, with current Bell-state measurement schemes based on line…
Experimental anonymous conference key agreement using linear cluster states
Lukas Rückle, Jakob Budde, Jarn de Jong +3
Multipartite entanglement enables secure and anonymous key exchange between multiple parties in a network. In particular Greenberger-Horne-Zeilinger (GHZ) states have been introduc…
A Quantum Optical Microphone in the Audio Band
Raphael Nold, Charles Babin, Joel Schmidt +12
The ability to perform high-precision optical measurements is paramount to science and engineering. Laser interferometry enables interaction-free sensing with a precision ultimatel…
The power of qutrits for non-adaptive measurement-based quantum computing
Jelena Mackeprang, Daniel Bhatti, Matty J. Hoban +1
Non-locality is not only one of the most prominent quantum features but can also serve as a resource for various information-theoretical tasks. Analysing it from an information-the…
Distinguishability and mixedness in quantum interference
Alex E Jones, Shreya Kumar, Simone D'Aurelio +3
We study the impact of distinguishability and mixedness -- two fundamental properties of quantum states -- on quantum interference. We show that these can influence the interferenc…
Anonymous and secret communication in quantum networks
Christopher Thalacker, Frederik Hahn, Jarn de Jong +2
Secure communication is one of the key applications of quantum networks. In recent years, following the demands for identity protection in classical communication protocols, the ne…
Anonymous Conference Key Agreement in Quantum Networks
Frederik Hahn, Jarn de Jong, Christopher Thalacker +3
Quantum Conference Key Agreement (CKA) is a cryptographic effort of multiple parties to establish a shared secret key. While bipartite quantum key distribution protocols are also u…
Correlations for computation and computation for correlations
Bülent Demirel, Weikai Weng, Christopher Thalacker +2
Quantum correlations are central to the foundations of quantum physics and form the basis of quantum technologies. Here, our goal is to connect quantum correlations and computation…
Implementation vulnerabilities in general quantum cryptography
Anqi Huang, Stefanie Barz, Erika Andersson +1
Quantum cryptography is information-theoretically secure owing to its solid basis in quantum mechanics. However, generally, initial implementations with practical imperfections mig…
Classical multiparty computation using quantum resources
Marco Clementi, Anna Pappa, Andreas Eckstein +3
In this work, we demonstrate a new way to perform classical multiparty computing amongst parties with limited computational resources. Our method harnesses quantum resources to inc…
Distinguishability and many-particle interference
Adrian J. Menssen, Alex E. Jones, Benjamin J. Metcalf +4
Quantum interference of two independent particles in pure quantum states is fully described by the particles' distinguishability: the closer the particles are to being identical, t…
Large scale quantum walks by means of optical fiber cavities
J. Boutari, A. Feizpour, S. Barz +4
We demonstrate a platform for implementing quantum walks that overcomes many of the barriers associated with photonic implementations. We use coupled fiber-optic cavities to implem…
Demonstration of measurement-only blind quantum computing
Chiara Greganti, Marie-Christine Roehsner, Stefanie Barz +2
Blind quantum computing allows for secure cloud networks of quasi-classical clients and a fully fledged quantum server. Recently, a new protocol has been proposed, which requires a…
Practical and efficient experimental characterization of multiqubit stabilizer states
Chiara Greganti, Marie-Christine Roehsner, Stefanie Barz +2
Vast developments in quantum technology have enabled the preparation of quantum states with more than a dozen entangled qubits. The full characterization of such systems demands di…
Enhanced delegated computing using coherence
Stefanie Barz, Vedran Dunjko, Florian Schlederer +3
A long-standing question is whether it is possible to delegate computational tasks securely. Recently, both a classical and a quantum solution to this problem were found. Here, we…
Linear-optical generation of eigenstates of the two-site XY model
Stefanie Barz, Borivoje Dakic, Yannick Ole Lipp +3
Much of the anticipation accompanying the development of a quantum computer relates to its application to simulating dynamics of another quantum system of interest. Here we study t…
Experimental verification of quantum computations
Stefanie Barz, Joseph F. Fitzsimons, Elham Kashefi +1
Quantum computers are expected to offer substantial speedups over their classical counterparts and to solve problems that are intractable for classical computers. Beyond such pract…
Demonstrating an element of measurement-based quantum error correction
Stefanie Barz, Rui Vasconcelos, Chiara Greganti +4
In measurement-based quantum computing an algorithm is performed by measurements on highly-entangled resource states. To date, several implementations were demonstrated, all of the…