Aswath Babu - Academia.edu (original) (raw)
Papers by Aswath Babu
arXiv (Cornell University), Dec 1, 2023
Quantum Natural Language Processing (QNLP) is taking huge leaps in solving the shortcomings of cl... more Quantum Natural Language Processing (QNLP) is taking huge leaps in solving the shortcomings of classical Natural Language Processing (NLP) techniques and moving towards a more "Explainable" NLP system. The current literature around QNLP focuses primarily on implementing QNLP techniques in sentences in the English language. In this paper, we propose to enable the QNLP approach to HINDI, which is the third most spoken language in South Asia. We present the process of building the parameterized quantum circuits required to undertake QNLP on Hindi sentences. We use the pregroup representation of Hindi and the DisCoCat framework to draw sentence diagrams. Later, we translate these diagrams to Parameterised Quantum Circuits based on Instantaneous Quantum Polynomial (IQP) style ansatz. Using these parameterized quantum circuits allows one to train grammar and topic-aware sentence classifiers for the Hindi Language.
arXiv (Cornell University), Aug 24, 2023
We explored the potential applications of various Quantum Algorithms for stock price prediction b... more We explored the potential applications of various Quantum Algorithms for stock price prediction by conducting a series of experimental simulations using both Classical as well as Quantum Hardware. Firstly, we extracted various stock price indicators, such as Moving Averages (MA), Average True Range (ATR), and Aroon, to gain insights into market trends and stock price movements. Next, we employed Quantum Annealing (QA) for feature selection and Principal Component Analysis (PCA) for dimensionality reduction. Further, we transformed the stock price prediction task essentially into a classification problem. We trained the Quantum Support Vector Machine (QSVM) to predict price movements (whether up or down) and contrasted its performance with classical models and analysed their accuracy on dataset formulated using Quantum Annealing and PCA individually. We focused on stock price prediction and binary classification of stock prices for four different companies, namely Apple, Visa, Johnson and Jonson and Honeywell. We primarily used the real-time stock data of the raw stock prices of these companies. We compared various Quantum Computing techniques with their classical counterparts in terms of accuracy and F-score of the prediction model. Through these experimental simulations, we shed light on the potential advantages and limitations of Quantum Algorithms in stock price prediction and contribute to the growing body of knowledge at the intersection of Quantum Computing and Finance.
We obtain optical instabilities in all-optical bistable systems arising from competing cooperativ... more We obtain optical instabilities in all-optical bistable systems arising from competing cooperative pathways at low input light levels. In particular for three-level atomic systems in the lambda and V configuration interacting with two independent cavity modes, we identify the necessary conditions related to the incoherent pathways required to obtain instabilities. The instabilities arise when atomic states involved in the bistable transition are leaky and have substantial population, where the incoherent processes adversely affect the cooperative behavior of the atomic ensemble.
2012 International Conference on Fiber Optics and Photonics, Dec 1, 2012
ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak... more ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak probe laser due to lambda system. We drive the system to exhibit periodic instability at lower input light strengths, and we explore nearby regime to achieve periodic refractive index and absorption.
Phys Rev a, 2011
We present novel hysteretic behaviour of a three-level ladder atomic system exhibiting doublecavi... more We present novel hysteretic behaviour of a three-level ladder atomic system exhibiting doublecavity optical bistability in the mean-field limit. The two fields coupling the atomic system experience feedback via two independent, unidirectional, single mode ring cavities and exhibit cooperative phenomena, simultaneously. The system displays a range of rich dynamical features varying from normal switching to self pulsing and a period-doubling route to chaos for both the fields. We focus our attention to a new hump like feature in the bistable curve arising purely due to cavity induced inversion, which eventually leads to negative hysteresis in the bistable response. This is probably the only all-optical bistable system that exhibits positive as well as negative bistable hysteresis in different input field intensity regimes. For both the fields, the switching times, the associated critical slowing down, the self-pulsing characteristics, and the chaotic behaviour can be controlled to a fair degree, moreover, all these effects occur at low input light levels.
International Conference on Fibre Optics and Photonics, 2012
ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak... more ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak probe laser due to lambda system. We drive the system to exhibit periodic instability at lower input light strengths, and we explore nearby regime to achieve periodic refractive index and absorption.
arXiv (Cornell University), Dec 1, 2023
Quantum Natural Language Processing (QNLP) is taking huge leaps in solving the shortcomings of cl... more Quantum Natural Language Processing (QNLP) is taking huge leaps in solving the shortcomings of classical Natural Language Processing (NLP) techniques and moving towards a more "Explainable" NLP system. The current literature around QNLP focuses primarily on implementing QNLP techniques in sentences in the English language. In this paper, we propose to enable the QNLP approach to HINDI, which is the third most spoken language in South Asia. We present the process of building the parameterized quantum circuits required to undertake QNLP on Hindi sentences. We use the pregroup representation of Hindi and the DisCoCat framework to draw sentence diagrams. Later, we translate these diagrams to Parameterised Quantum Circuits based on Instantaneous Quantum Polynomial (IQP) style ansatz. Using these parameterized quantum circuits allows one to train grammar and topic-aware sentence classifiers for the Hindi Language.
arXiv (Cornell University), Aug 24, 2023
We explored the potential applications of various Quantum Algorithms for stock price prediction b... more We explored the potential applications of various Quantum Algorithms for stock price prediction by conducting a series of experimental simulations using both Classical as well as Quantum Hardware. Firstly, we extracted various stock price indicators, such as Moving Averages (MA), Average True Range (ATR), and Aroon, to gain insights into market trends and stock price movements. Next, we employed Quantum Annealing (QA) for feature selection and Principal Component Analysis (PCA) for dimensionality reduction. Further, we transformed the stock price prediction task essentially into a classification problem. We trained the Quantum Support Vector Machine (QSVM) to predict price movements (whether up or down) and contrasted its performance with classical models and analysed their accuracy on dataset formulated using Quantum Annealing and PCA individually. We focused on stock price prediction and binary classification of stock prices for four different companies, namely Apple, Visa, Johnson and Jonson and Honeywell. We primarily used the real-time stock data of the raw stock prices of these companies. We compared various Quantum Computing techniques with their classical counterparts in terms of accuracy and F-score of the prediction model. Through these experimental simulations, we shed light on the potential advantages and limitations of Quantum Algorithms in stock price prediction and contribute to the growing body of knowledge at the intersection of Quantum Computing and Finance.
We obtain optical instabilities in all-optical bistable systems arising from competing cooperativ... more We obtain optical instabilities in all-optical bistable systems arising from competing cooperative pathways at low input light levels. In particular for three-level atomic systems in the lambda and V configuration interacting with two independent cavity modes, we identify the necessary conditions related to the incoherent pathways required to obtain instabilities. The instabilities arise when atomic states involved in the bistable transition are leaky and have substantial population, where the incoherent processes adversely affect the cooperative behavior of the atomic ensemble.
2012 International Conference on Fiber Optics and Photonics, Dec 1, 2012
ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak... more ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak probe laser due to lambda system. We drive the system to exhibit periodic instability at lower input light strengths, and we explore nearby regime to achieve periodic refractive index and absorption.
Phys Rev a, 2011
We present novel hysteretic behaviour of a three-level ladder atomic system exhibiting doublecavi... more We present novel hysteretic behaviour of a three-level ladder atomic system exhibiting doublecavity optical bistability in the mean-field limit. The two fields coupling the atomic system experience feedback via two independent, unidirectional, single mode ring cavities and exhibit cooperative phenomena, simultaneously. The system displays a range of rich dynamical features varying from normal switching to self pulsing and a period-doubling route to chaos for both the fields. We focus our attention to a new hump like feature in the bistable curve arising purely due to cavity induced inversion, which eventually leads to negative hysteresis in the bistable response. This is probably the only all-optical bistable system that exhibits positive as well as negative bistable hysteresis in different input field intensity regimes. For both the fields, the switching times, the associated critical slowing down, the self-pulsing characteristics, and the chaotic behaviour can be controlled to a fair degree, moreover, all these effects occur at low input light levels.
International Conference on Fibre Optics and Photonics, 2012
ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak... more ABSTRACT Optical bistability is used to control the dispersion and absorption experienced by weak probe laser due to lambda system. We drive the system to exhibit periodic instability at lower input light strengths, and we explore nearby regime to achieve periodic refractive index and absorption.