155 citations · 468 across the 44 of their papers we have counts for
49 papers
Simultaneous estimations of quantum state and detector through multiple quantum processes
Shuixin Xiao, Weichao Liang, Yuanlong Wang +3
The estimation of all the parameters in an unknown quantum state or measurement device, commonly known as quantum state tomography (QST) and quantum detector tomography (QDT), is c…
A two-disk approach to the synthesis of coherent passive equalizers for linear quantum systems
Valery Ugrinovskii, Shuixin Xiao
The coherent equalization problem consists in designing a quantum system acting as a mean-square near-optimal filter for a given quantum communication channel. The paper develops a…
Continuous-Time Channel Gain Control for Minimum-Information Kalman-Bucy Filtering
Takashi Tanaka, Vrushabh Zinage, Valery Ugrinovskii +1
We consider the problem of estimating a continuous-time Gauss-Markov source process observed through a vector Gaussian channel with an adjustable channel gain matrix. For a given (…
Distributed Estimation Resilient to Biasing Attacks
Valery Ugrinovskii
We consider the distributed estimation problem with an additional requirement of resilience to biasing attacks. An attack scenario is considered where an adversary misap…
Wiener Filtering for Passive Linear Quantum Systems
V. Ugrinovskii, M. R. James
This paper considers a version of the Wiener filtering problem for equalization of passive quantum linear quantum systems. We demonstrate that taking into consideration the quantum…
Detection and Mitigation of Biasing Attacks on Distributed Estimation Networks
Mohammad Deghat, Valery Ugrinovskii, Iman Shames +1
The paper considers a problem of detecting and mitigating biasing attacks on networks of state observers targeting cooperative state estimation algorithms. The problem is cast with…
Resilient Distributed Estimation via Dynamic Rejection of Biasing Attacks
V. Ugrinovskii
We consider the distributed estimation problem with additional requirement of resilience to biasing attacks. An attack scenario is considered where an adversary misappro…
A Systems Theory Approach to the Synthesis of Minimum Noise Phase-Insensitive Quantum Amplifiers
Ian R. Petersen, Matthew R. James, Valery Ugrinovskii +1
We present a systems theory approach to the proof of a result bounding the required level of added quantum noise in a phase-insensitive quantum amplifier. We also present a synthes…
Robust Detection of Biasing Attacks on Misappropriated Distributed Observers via Decentralized synthesis
V. Ugrinovskii
We develop a decentralized synthesis approach to detection of biasing misappropriation attacks on distributed observers. Its starting point is to equip the observer with…
Pole Placement Approach to Coherent Passive Reservoir Engineering for Storing Quantum Information
T. Nguyen, Z. Miao, Y. Pan +3
Reservoir engineering is the term used in quantum control and information technologies to describe manipulating the environment within which an open quantum system operates. Reserv…
Optimal Sensor Design and Zero-Delay Source Coding for Continuous-Time Vector Gauss-Markov Processes
Takashi Tanaka, Mikael Skoglund, Valeri Ugrinovskii
We consider the situation in which a continuous-time vector Gauss-Markov process is observed through a vector Gaussian channel (sensor) and estimated by the Kalman-Bucy filter. Unl…
Controller-jammer game models of Denial of Service in control systems operating over packet-dropping links
V. Ugrinovskii, C. Langbort
The paper introduces a class of zero-sum games between the adversary and controller as a scenario for a `denial of service' in a networked control system. The communication link is…
Detection of Biasing Attacks on Distributed Estimation Networks
Mohammad Deghat, Valery Ugrinovskii, Iman Shames +1
The paper addresses the problem of detecting attacks on distributed estimator networks that aim to intentionally bias process estimates produced by the network. It provides a suffi…
Cooperative Robust Estimation with Local Performance Guarantees
M. Zamani, V. Ugrinovskii
The paper considers the problem of cooperative estimation for a linear uncertain plant observed by a network of communicating sensors. We take a novel approach by treating the filt…
Event-triggered leader-following tracking control for multivariable multi-agent systems
Yi Cheng, V. Ugrinovskii
The paper considers event-triggered leader-follower tracking control for multi-agent systems with general linear dynamics. For both undirected and directed follower graphs, we prop…
Quantum state transfer through time reversal of an optical channel
M. R. Hush, C. D. B. Bentley, R. L. Ahlefeldt +3
Rare earth ions have exceptionally long coherence times, making them an excellent candidate for quantum information processing. A key part of this processing is quantum state trans…
Cooperative Estimation for Synchronization of Heterogeneous Multi-Agent Systems Using Relative Information
Jingbo Wu, Valery Ugrinovskii, Frank Allgöwer
In this paper, we present a distributed estimation setup where local agents estimate their states from relative measurements received from their neighbours. In the case of heteroge…
Distributed robust estimation over randomly switching networks using consensus
V. Ugrinovskii
The paper considers a distributed robust estimation problem over a network with Markovian randomly varying topology. The objective is to deal with network variations locally, by sw…
Distributed Filter Design for Cooperative H-Infinity-Type Estimation
Jingbo Wu, Li Li, Valery Ugrinovskii +1
In this paper, we consider the distributed robust filtering problem, where estimator design is based on a set of coupled linear matrix inequalities (LMIs). We separate the problem…
Pole placement design for quantum systems via coherent observers
Zibo Miao, Matthew R. James, Valery A. Ugrinovskii
We previously extended Luenberger's approach for observer design to the quantum case, and developed a class of coherent observers which tracks linear quantum stochastic systems in…
LQG feedback control of a class of linear non-Markovian quantum systems
Shibei Xue, Matthew R. James, Valery Ugrinovskii +1
In this paper we present a linear quadratic Gaussian (LQG) feedback control strategy for a class of linear non-Markovian quantum systems. The feedback control law is designed based…
Quantum filter for a non-Markovian single qubit system
Shibei Xue, Matthew R. James, Alireza Shabani +2
In this paper, a quantum filter for estimating the states of a non-Markovian qubit system is presented in an augmented Markovian system framework including both the qubit system of…
Cooperative H-infinity Estimation for Large-Scale Interconnected Linear Systems
Jingbo Wu, Valery Ugrinovskii, Frank Allgöwer
In this paper, a synthesis method for distributed estimation is presented, which is suitable for dealing with large-scale interconnected linear systems with disturbance. The main f…
Quantum filter for a class of non-Markovian quantum systems
Shibei Xue, Matthew R. James, Alireza Shabani +2
In this paper we present a Markovian representation approach to constructing quantum filters for a class of non-Markovian quantum systems disturbed by Lorenztian noise. An ancillar…