Device-independent certification of non-classical joint measurements via causal models

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Experimental semi-device-independent certification of entangled measurements.

Certifying the entanglement of quantum states with Bell inequalities allows one to guarantee the security of quantum information protocols independently of imperfections in the measuring devices. Here, we present a similar procedure for witnessing entangled measurements, which play a central role in many quantum information tasks. Our procedure is termed semi-device-independent, as it uses unch...

متن کامل

Computational tameness of classical non-causal models

We show that the computational power of the non-causal circuit model, i.e. the circuit model where the assumption of a global causal order is replaced by the assumption of logical consistency, is completely characterized by the complexity class UP∩coUP. An example of a problem in that class is factorization. Our result implies that classical deterministic closed timelike curves (CTCs) cannot ef...

متن کامل

Device-independent certification of high-dimensional quantum systems.

An important problem in quantum information processing is the certification of the dimension of quantum systems without making assumptions about the devices used to prepare and measure them, that is, in a device-independent manner. A crucial question is whether such certification is experimentally feasible for high-dimensional quantum systems. Here we experimentally witness in a device-independ...

متن کامل

Device-independent tests of classical and quantum dimensions.

We address the problem of testing the dimensionality of classical and quantum systems in a "black-box" scenario. We develop a general formalism for tackling this problem. This allows us to derive lower bounds on the classical dimension necessary to reproduce given measurement data. Furthermore, we generalize the concept of quantum dimension witnesses to arbitrary quantum systems, allowing one t...

متن کامل

Signal Acquisition from Measurements via Non-Linear Models

We consider the problem of reconstruction of a non-linear finite-parametric model M = Mp(x), with p = (p1, . . . , pr) a set of parameters, from a set of measurements μj(M). In this paper μj(M) are always the moments mj(M) = ∫ xMp(x)dx. This problem is a central one in Signal Processing, Statistics, and in many other applications. We concentrate on a direct (and somewhat “naive”) approach to th...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: npj Quantum Information

سال: 2019

ISSN: 2056-6387

DOI: 10.1038/s41534-019-0151-1