Incomplete quantum state estimation: A comprehensive study

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

Traffic state estimation on highway: A comprehensive survey

Traffic state estimation (TSE) refers to the process of the inference of traffic state variables (i.e., flow, density, speed and other equivalent variables) on road segments using partially observed traffic data. It is a key component of traffic control and operations, because traffic variables are measured not everywhere due to technological and financial limitations, and their measurement is ...

متن کامل

Least-bias state estimation with incomplete unbiased measurements

Jaroslav Řeháček,1 Zdeněk Hradil,1 Yong Siah Teo,1 Luis L. Sánchez-Soto,2,3 Hui Khoon Ng,4,5,6 Jing Hao Chai,5 and Berthold-Georg Englert5,6,7 1Department of Optics, Palacký University, 17. listopadu 12, 77146 Olomouc, Czech Republic 2Departamento de Óptica, Facultad de Fı́sica, Universidad Complutense, 28040 Madrid, Spain 3Max-Planck-Institut für die Physik des Lichts, Günther-Scharowsky-Straße...

متن کامل

Bhattacharyya inequality for quantum state estimation

Using higher-order derivative with respect to the parameter, we will give lower bounds for variance of unbiased estimators in quantum estimation problems. This is a quantum version of the Bhattacharyya inequality in the classical statistical estimation. Because of non-commutativity of operator multiplication, we obtain three different types of lower bounds; Type S, Type R and Type L. If the par...

متن کامل

Intensity and State Estimation in Quantum Cryptography

This paper describes how the communicating parties can employ intensity and state estimation to detect if the eavesdropper has siphoned off and injected photons in the received communication. This is of relevance in quantum cryptography based on random rotations of photon polarizations. Introduction The paper investigates the use of state and intensity measurements by Alice and Bob to detect th...

متن کامل

Quantum state estimation and large deviations

In this paper we propose a method to estimate the density matrix ρ of a d-level quantum system by measurements on the N-fold system in the joint state ρ . The scheme is based on covariant observables and representation theory of unitary groups and it extends previous results concerning the estimation of the spectrum of ρ. We show that it is consistent (i.e. the original input state ρ is recover...

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: Physical Review A

سال: 2012

ISSN: 1050-2947,1094-1622

DOI: 10.1103/physreva.85.042317