608 citations · 2.2k across the 51 of their papers we have counts for
51 papers
The statistical disturbance bound of quantum measurements
Ties-A. Ohst, Sebastian Schlösser, Roope Uola
Quantifying the disturbance caused by a quantum measurement typically requires detailed knowledge of the underlying measurement channel. In this work, we introduce a statistical di…
Quantifying randomness with measurement incompatibility
Sebastian Schlösser, Pauli Jokinen, Martin Plávala +3
We present a trade-off between the amount of observed measurement incompatibility and the capabilities of a classical Eavesdropper in a prepare-and-measure scenario. The result is…
Certification of the genuine resolution of photon number resolving detectors
Jef Pauwels, Towsif Taher, Roope Uola +3
Photon-number-resolving (PNR) detectors are essential components of photonic quantum technologies, yet thus far, no practical metric exists to certify how many photons they can gen…
High-Dimensional Quantum Photonics: Roadmap
Mehul Malik, Micheal Kues, Takuya Ikuta +30
The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode mu…
Can every set of incompatible measurements lead to genuine multipartite steering?
Lucas E. A. Porto, Lucas Tendick, Daniel Cavalcanti +2
Measurement incompatibility and bipartite quantum steering are known to display a strong connection: a set of measurements is incompatible if and only if it can lead to bipartite s…
Bell and EPR experiments with signalling data
Lucas Maquedano, Sophie Egelhaaf, Amro Abou-Hachem +4
The no-signalling principle is a fundamental assumption in Bell-inequality and quantum-steering experiments. Nonetheless, experimental imperfections can lead to apparent violations…
Simulating quantum measurements without superposition devices
Gabriele Cobucci, Alexander Bernal, Roope Uola +1
Superposition is the core feature that sets quantum theory apart from classical physics. Here, we investigate whether sets of quantum measurements can be modelled by using devices…
Generalised contextuality of continuous variable quantum theory can be revealed with a single projective measurement
Pauli Jokinen, Mirjam Weilenmann, Martin Plávala +3
Generalized contextuality is a possible indicator of non-classical behaviour in quantum information theory. In finite-dimensional systems, this is justified by the fact that noncon…
Certification of quantum networks using the generalised Choi isomorphism
Sophie Egelhaaf, Roope Uola
We present a framework for certifying entanglement properties of quantum states and measurements in line networks. The framework is based on the generalised Choi isomorphism, which…
Certifying high-dimensional quantum channels
Sophie Engineer, Suraj Goel, Sophie Egelhaaf +9
The use of high-dimensional systems for quantum communication opens interesting perspectives, such as increased information capacity and noise resilience. In this context, it is cr…
On compatibility of binary qubit measurements
Dmitry Grinko, Roope Uola
Deciding which sets of quantum measurements allow a simultaneous readout is a central problem in quantum measurement theory. The problem is relevant not only from the foundational…
Certifying measurement incompatibility in prepare-and-measure and Bell scenarios
Sophie Egelhaaf, Jef Pauwels, Marco Túlio Quintino +1
We consider the problem of certifying measurement incompatibility in a prepare-and-measure (PM) scenario. We present different families of sets of qubit measurements which are inco…
Binarisation of multi-outcome measurements in high-dimensional quantum correlation experiments
Armin Tavakoli, Roope Uola, Jef Pauwels
High-dimensional systems are an important frontier for photonic quantum correlation experiments. These correlation tests commonly prescribe measurements with many possible outcomes…
No-broadcasting characterizes operational contextuality
Pauli Jokinen, Mirjam Weilenmann, Martin Plávala +3
Operational contextuality forms a rapidly developing subfield of quantum information theory. However, the characterization of the quantum mechanical entities that fuel the phenomen…
Compressing continuous variable quantum measurements
Pauli Jokinen, Sophie Egelhaaf, Juha-Pekka Pellonpää +1
We generalize the notion of joint measurability to continuous variable systems by extending a recently introduced compression algorithm of quantum measurements to this realm. The e…
Quantum complementarity: A novel resource for unambiguous exclusion and encryption
Chung-Yun Hsieh, Roope Uola, Paul Skrzypczyk
Complementarity is a phenomenon explaining several core features of quantum theory, such as the well-known uncertainty principle. Roughly speaking, two objects are said to be compl…
Semi-device-independent certification of number of measurements
Isadora Veeren, Martin Plávala, Leevi Leppäjärvi +1
We develop a method for semi-device-independent certification of number of measurements. We achieve this by testing whether Bob's steering equivalent observables (SEO) can be simul…
Barycentric decomposition for quantum instruments
Juha-Pekka Pellonpää, Erkka Haapasalo, Roope Uola
We present a barycentric decomposition for quantum instruments whose output space is finite-dimensional and input space is separable. As a special case, we obtain a barycentric dec…
Correcting for finite statistics effects in a quantum steering experiment
Sophie Engineer, Ana C. S. Costa, Alexandre C. Orthey +7
Verifying entanglement between parties is essential for creating secure quantum communication. However, finite statistics can lead to false positive outcomes in any tests for entan…
Unlimited One-Way Steering
Pavel Sekatski, Florian Giraud, Roope Uola +1
This work explores the asymmetry of quantum steering in a setup using high-dimensional entanglement. We construct entangled states with the following properties: one party (A…
Retrievability of information in quantum and realistic hidden variable theories
Roope Uola, Erkka Haapasalo, Juha-Pekka Pellonpää +1
We propose a generalisation of the Leggett-Garg conditions for macrorealistic behaviour. Our proposal relies on relaxing the postulate of non-invasive measurability with that of re…
Naimark dilations of qubit POVMs and joint measurements
Juha-Pekka Pellonpää, Sébastien Designolle, Roope Uola
Measurement incompatibility is one of the cornerstones of quantum theory. This phenomenon appears in many forms, of which the concept of non-joint measurability has received consid…
Equivalence between simulability of high-dimensional measurements and high-dimensional steering
Benjamin D. M. Jones, Roope Uola, Thomas Cope +4
The effect of quantum steering arises from the judicious combination of an entangled state with a set of incompatible measurements. Recently, it was shown that this form of quantum…
Quantifying the high-dimensionality of quantum devices
Thomas Cope, Roope Uola
We introduce a measure of average dimensionality (or coherence) for high-dimensional quantum devices. This includes sets of quantum measurements, steering assemblages, and quantum…