Abstract

In the recent years we have seen that Grover search algorithm [1] by using quantum parallelism has revolutionized the field of solving huge class of NP problems in comparisons to classical systems. In this work we explore the idea of extending Grover search algorithm to approximate algorithms. Here we try to analyze the applicability of Grover search to process an unstructured database with a dynamic selection function in contrast to the static selection function used in the original work [1]. We show that this alteration facilitates us to extend the application of Grover search to the field of randomized search algorithms. Further, we use the Dynamic Grover search algorithm to define the goals for a recommendation system based on which we propose a recommendation algorithm which uses binomial similarity distribution space giving us a quadratic speedup over traditional classical unstructured recommendation systems. Finally, we see how Dynamic Grover search can be used to tackle a wide range of optimization problems where we improve complexity over existing optimization algorithms.

Abstract

DESIGN OF RF SENSOR FOR SIMULTANEOUS DETECTION OF COMPLEX PERMEABILITY AND PERMITTIVITY OF UNKNOWN SAMPLE

Abstract

We introduce a new feature of no-signaling (Bell) non-local theories, namely, when a system of multiple parties manifests genuine non-local correlation, then there cannot be arbitrarily high nonlocal correlation among any subset of the parties. We call this feature, complementarity of genuine multipartite non-locality. We use Svetlichny’s criterion for genuine multipartite non-locality and nonlocal games to derive the complementarity relations under no-signaling constraints. We find that the complementarity relations are tightened for the much stricter quantum constraints. We compare this notion with the well-known notion of monogamy of non-locality. As a consequence, we obtain tighter non-trivial monogamy relations that take into account genuine multipartite non-locality. Furthermore, we provide numerical evidence showcasing this feature using a bipartite measure and several other well-known tripartite measures of non-locality.

Abstract

Quantum coherence has recently emerged as a key candidate for use as a resource in various quantum information processing tasks. Therefore, it is of utmost importance to explore the possibility of creating a greater number of coherent states from an existing coherent pair. In other words we start with initial incoherent pair and induce coherence via quantum cloning. More specifically, we start with a genuinely incoherent state which remains incoherent with the change of basis and make it a coherent state at the end. This process is known as broadcasting of coherence via cloning, which can either be optimal or non-optimal. Interestingly, in this work for the first time we are able to give a method by which we can introduce coherence in the genuinely incoherent state. We use the computational basis representation of the most general two-qubit mixed state, shared between Alice and Bob, as the input state for the universal symmetric optimal Buzek-Hillery cloner. First of all we show that it is impossible to ensure optimal broadcast of coherence. Secondly, in case of non-optimal broadcasting, we show that the coherence introduced in the output states of the cloner will always be lesser than the initial coherence of the input state. Finally, we take the examples of statistical mixture of most coherent state (MCS) & most incoherent state (MIX) and Bell-diagonal states (BDS) to obtain their respective ranges of non-optimal broadcasting in terms of their input state parameters.

Abstract

The semiconductor gain medium has rich non-linear dynamics and several internal parameters influence the generation and propagation of light through it. With the gain medium being an integral part of semiconductor ring laser gyroscope (SRLG) cavity, its parameters affect the overall performance of the gyro. The effect is further elevated in integrated SRLG due to stronger confinement of charge carriers and photons leading to a more intense interaction between them. In this paper, we evaluate the influence of semiconductor gain medium parameters such as gain saturation coefficient, linewidth, internal quantum efficiency etc. on the sensitivity of bulk fiber-optic SRLG. Ways of controlling these parameters and optimizing their values to enhance the performance of SRLG are also discussed.

Abstract

This paper describes the system design considerations and challenges faced during the design of automotive power management ICs (PMIC). Rear view camera have been considered as a case study because of wide spread acceptance as driver assistance systems. Optimal IC architectures with DC-DC and LDO combination and their trade-offs have been carefully analyzed. Key considerations regarding automotive transients, high temperature, IC technology, package and pinout have been analyzed and a two-chip architecture has been proposed as an optimal partitioning between cost, efficiency and reliability in harsh automotive environment.

Abstract

In this paper, a novel microwave planar resonant sensor (using two spiral inductors) is designed and developed for detection of ferritin from the blood sample using non destructive technique. Due to concentration change of ferritin in blood, shift in resonant frequency arise. The frequency range of 15 GHz-16 GHz is used as it is effective for label-free analysis of ferritin. The sensor is designed using the full wave electromagnetic solver, HFSS 13.0, and an empirical model is developed for the accurate calculation of ferritin concentration in terms of shifts in the resonant frequency. Due to homogeneous H-field in spacing between two inductors, placement position of ferritin will not affect the sensitivity. Significant frequency shifts as high as 105 MHz, 192 MHz, 310 MHz and 655 MHz are observed for concentrations as low as 20 ng/ml, 50 ng/ml, 100 ng/ml and 320 ng/ml of ferritin respectively. Simulation results suggest …

Abstract

The recent proliferation of mobile devices, such as smartphones and wearable devices has given rise to crowdsourcing Internet of Things (IoT) applications. E-healthcare service is one of the important services for the crowdsourcing IoT applications that facilitates remote access or storage of medical server data to the authorized users (for example, doctors, patients, and nurses) via wireless communication. As wireless communication is susceptible to various kinds of threats and attacks, remote user authentication is highly essential for a hazard-free use of these services. In this paper, we aim to propose a new secure three-factor user remote user authentication protocol based on the extended chaotic maps. The three factors involved in the proposed scheme are: 1) smart card; 2) password; and 3) personal biometrics. As the proposed scheme avoids computationally expensive elliptic curve point multiplication or modular exponentiation operation, it is lightweight and efficient. The formal security verification using the widely-accepted verification tool, called the ProVerif 1.93, shows that the presented scheme is secure. In addition, we present the formal security analysis using the both widely accepted real-or-random model and Burrows-Abadi-Needham logic. With the combination of high security and appreciably low communication and computational overheads, our scheme is very much practical for battery limited devices for the healthcare applications as compared to other existing related schemes.

Abstract

Implantable medical devices (IMDs) are man-made devices, which can be implanted in the human body to improve the functioning of various organs. The IMDs monitor and treat physiological condition of the human being (for example, monitoring of blood glucose level by insulin pump). The advancement of information and communication technology enhances the communication capabilities of IMDs. In healthcare applications, after mutual authentication, a user (for example, doctor) can access the health data from the IMDs implanted in a patient's body. However, in this kind of communication environment, there are always security and privacy issues, such as leakage of health data and malfunctioning of IMDs by an unauthorized access. To mitigate these issues, in this paper, we propose a new secure remote user authentication scheme for IMDs communication environment to overcome security and privacy issues in existing schemes. We provide the formal security verification using the widely accepted Automated Validation of Internet Security Protocols and Applications tool. We also provide the informal security analysis of the proposed scheme. The formal security verification and informal security analysis prove that the proposed scheme is secure against known attacks. The practical demonstration of the proposed scheme is performed using the broadly accepted NS2 simulation tool. The computation and communication costs of the proposed scheme are also comparable with the existing schemes. Moreover, the scheme provides additional functionality features, such as anonymity, untraceability, and dynamic implantable medical device addition.

Abstract

Wireless sensor networks (WSNs) for Internet of Things (IoT) can be deployed in a wide range of industries such as agriculture and military. However, designing a secure and reliable authentication scheme for WSNs that can be deployed in IoT remains a research and operational challenge. For example, recently in 2016, Amin and Biswas showed that the Turcanović et al.'s scheme is vulnerable to smart card loss attack, user impersonation attack, etc. They then proposed a new authentication scheme for WSNs with multi-gateway. In this paper, we revisit the scheme of Amin and Biswas and reveal previously unknown vulnerabilities in the scheme (i.e. sensor capture attack, user forgery attack, gateway forgery attack, sensor forgery attack and off-line guessing attack). In addition, we demonstrate that the user in the scheme can be tracked due to the use of a constant pseudo-identity and previously established session keys can be calculated by the attacker. Rather than attempting to fix a broken scheme, we present a novel authentication scheme for multi-gateway based WSNs. We then demonstrate the security of the proposed scheme using Proverif, as well as evaluating the good performance of the scheme using NS-2 simulation.