# Self-Testing of Physical Theories, or, Is Quantum Theory Optimal with Respect to Some Information-Processing Task?

@article{Weilenmann2020SelfTestingOP, title={Self-Testing of Physical Theories, or, Is Quantum Theory Optimal with Respect to Some Information-Processing Task?}, author={Mirjam Weilenmann and Roger Colbeck}, journal={Physical review letters}, year={2020}, volume={125 6}, pages={ 060406 } }

Self-testing usually refers to the task of taking a given set of observed correlations that are assumed to arise via a process that is accurately described by quantum theory, and trying to infer the quantum state and measurements. In other words it is concerned with the question of whether we can tell what quantum black-box devices are doing by looking only at their input-output behavior and is known to be possible in several cases. Here we introduce a more general question: is it possible to…

## 8 Citations

Toward correlation self-testing of quantum theory in the adaptive Clauser-Horne-Shimony-Holt game

- Computer Science
- 2020

It is proved that it is impossible to recover the quantum performance in various cases in the adaptive CHSH game, enabling an experiment that could rule out all theories in which the set of realisable correlations does not coincide with the quantum set.

Distributed Computing Model: Classical vs. Quantum vs. Post-Quantum.

- Computer Science
- 2020

The proposed computing model provides a new approach to single out quantum theory in the theory space and promises a novel perspective towards the axiomatic derivation of Hilbert space quantum mechanics.

Quantum physics needs complex numbers

- Physics
- 2021

Marc-Olivier Renou, David Trillo, Mirjam Weilenmann, Le Phuc Thinh, Armin Tavakoli, Nicolas Gisin, Antonio Aćın and Miguel Navascués ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of…

Covariance Decomposition as a Universal Limit on Correlations in Networks

- MathematicsIEEE Transactions on Information Theory
- 2022

It is shown that in a network satisfying a certain condition, the covariance matrix of any feasible correlation can be decomposed as a summation of positive semidefinite matrices each of whose terms corresponds to a source in the network.

Information Processing Methods of Electronic Warfare Events Based on Communication Technology

- Computer ScienceSecur. Commun. Networks
- 2022

The experimental results show that the method proposed in this paper increases the recall rate by 5 to 20% compared with other methods and can effectively shorten the time for electronic countermeasure incident intelligence processing.

Operational Theories in Phase Space: Toy Model for the Harmonic Oscillator.

- PhysicsPhysical review letters
- 2022

We show how to construct general probabilistic theories that contain an energy observable dependent on position and momentum. The construction is in accordance with classical and quantum theory and…

Any physical theory of nature must be boundlessly multipartite nonlocal

- PhysicsPhysical Review A
- 2021

We introduce the class of Genuinely Local Operation and Shared Randomness (LOSR) Multipartite Nonlocal correlations, that is, correlations between N parties that cannot be obtained from unlimited…

Quantum theory based on real numbers can be experimentally falsified.

- PhysicsNature
- 2021

It is shown that real and complex Hilbert-space formulations of quantum theory make different predictions in network scenarios comprising independent states and measurements, which allows us to devise a Bell-like experiment, the successful realization of which would disprove real quantum theory in the same way as standard Bell experiments disproved local physics.

## References

SHOWING 1-10 OF 33 REFERENCES

Toward correlation self-testing of quantum theory in the adaptive Clauser-Horne-Shimony-Holt game

- Computer Science
- 2020

It is proved that it is impossible to recover the quantum performance in various cases in the adaptive CHSH game, enabling an experiment that could rule out all theories in which the set of realisable correlations does not coincide with the quantum set.

Information processing in generalized probabilistic theories

- Physics
- 2005

A framework in which a variety of probabilistic theories can be defined, including classical and quantum theories, and many others, is introduced, and a tensor product rule for combining separate systems can be derived.

Generalized probabilistic theories without the no-restriction hypothesis

- Mathematics
- 2013

The framework of generalized probabilistic theories (GPTs) is a popular approach for studying the physical foundations of quantum theory. The standard framework assumes the no-restriction hypothesis,…

Information causality as a physical principle

- Computer ScienceNature
- 2009

It is suggested that information causality—a generalization of the no-signalling condition—might be one of the foundational properties of nature and help to distinguish physical theories from non-physical ones.

Almost quantum correlations.

- Physics, PhilosophyNature communications
- 2015

It is reported that, at the level of correlations among different systems, quantum theory is not so special, and a set of correlations is defined, dubbed 'almost quantum', that strictly contains the set of quantum correlations but satisfies all-but-one of the proposed principles to capture quantum correlations.

All pure bipartite entangled states can be self-tested

- PhysicsNature communications
- 2017

This work addresses the long-standing open question of whether every pure bipartite entangled state is self-testable and answers it affirmatively by providing explicit self-testing correlations for all such states.

Beyond Bell's theorem: correlation scenarios

- Computer Science
- 2012

This work considers scenarios which feature several sources, but no choice of measurement for the observers, and describes examples of (quantum) non-locality in some of these scenarios, while posing many open problems along the way.

Limits on nonlocal correlations from the structure of the local state space

- Physics
- 2010

The outcomes of measurements on entangled quantum systems can be nonlocally correlated. However, while it is easy to write down toy theories allowing arbitrary nonlocal correlations, those allowed in…

A glance beyond the quantum model

- PhysicsProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
- 2009

One of the most important problems in physics is to reconcile quantum mechanics with general relativity, and some authors have suggested that this may be realized at the expense of having to drop the…

Local orthogonality as a multipartite principle for quantum correlations.

- Computer ScienceNature communications
- 2013

Local orthogonality, an intrinsically multipartite principle stating that events involving different outcomes of the same local measurement must be exclusive or orthogonal, is introduced and it is proved that it is equivalent to no-signalling in the bipartite scenario but more restrictive for more than two parties.