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An Introduction to Quantum Mechanics
An Introduction to Quantum Mechanics
Prof. D. S. Kulshreshtha,
Prof. D. S. Kulshreshtha,
Retired Professor and Former Head, Delhi University, Delhi
Retired Professor and Former Head, Delhi University, Delhi
Prof. Daya Shankar Kulshreshtha obtained B.Sc. (1969) and M.Sc. (1971) degrees from Jiwaji University, Gwalior. He received his Ph.D. in 1979 from the University of Delhi, under the supervision of Prof. R. P. Saxena. Following an appointment as lecturer in physics at Rajdhani College of the University of Delhi in 1977, Prof. Kulshreshtha worked as a postdoctoral researcher at the University of Kaiserslautern (1982–1984).
Prof. Daya Shankar Kulshreshtha obtained B.Sc. (1969) and M.Sc. (1971) degrees from Jiwaji University, Gwalior. He received his Ph.D. in 1979 from the University of Delhi, under the supervision of Prof. R. P. Saxena. Following an appointment as lecturer in physics at Rajdhani College of the University of Delhi in 1977, Prof. Kulshreshtha worked as a postdoctoral researcher at the University of Kaiserslautern (1982–1984).
He then held a five-year position of a UGC-Research Scientist of the University Grants Commission of India at the University of Delhi (1986–1991) followed by a five year position at the University of Kaiserslautern, Germany (1990–1994) before being appointed a professor at the University of Delhi in 1994. Prof. Kulshreshtha remained a professor at the university of Delhi until 2016, serving as Head of the Department of Physics and Astrophysics during 2007–2010. Since 2011 he was several times visiting faculty in the Nuclear Physics Theory Group at Iowa State University and at Carl von Ossietzky University of Oldenburg.
He then held a five-year position of a UGC-Research Scientist of the University Grants Commission of India at the University of Delhi (1986–1991) followed by a five year position at the University of Kaiserslautern, Germany (1990–1994) before being appointed a professor at the University of Delhi in 1994. Prof. Kulshreshtha remained a professor at the university of Delhi until 2016, serving as Head of the Department of Physics and Astrophysics during 2007–2010. Since 2011 he was several times visiting faculty in the Nuclear Physics Theory Group at Iowa State University and at Carl von Ossietzky University of Oldenburg.
Prof. Kulshreshtha's research focuses on formal aspects of quantum field theory, string theory and general relativity. In particular, he studies the canonical structure, constrained dynamics and instant-form and light-front quantization of field theory, string theory and D-brane actions using the Hamiltonian and path integral formulation(s) as well as the BRST quantization. He is a member of the International Light Cone Advisory Committee. He helped organize the 2012 International Conference on Light-Cone Physics at the University of Delhi. He also studies exotic stars, boson stars, boson shells, black holes and wormholes in general relativity , work which was profiled by the American Physical Society's Physics Central site.
Prof. Kulshreshtha's research focuses on formal aspects of quantum field theory, string theory and general relativity. In particular, he studies the canonical structure, constrained dynamics and instant-form and light-front quantization of field theory, string theory and D-brane actions using the Hamiltonian and path integral formulation(s) as well as the BRST quantization. He is a member of the International Light Cone Advisory Committee. He helped organize the 2012 International Conference on Light-Cone Physics at the University of Delhi. He also studies exotic stars, boson stars, boson shells, black holes and wormholes in general relativity , work which was profiled by the American Physical Society's Physics Central site.
Date: 21st June 2020,
Date: 21st June 2020,
Time: 14:00 - 15:00 (IST)
Time: 14:00 - 15:00 (IST)
Questions during talk
Questions during talk
Shekhar physics:
Shekhar physics:
Gd afternoon sir as u stated sir Dirac has introduced a remarkable concept of bra-kets to ensure state vectors is independent of co-ordinate system.but vectors itself independent of co-ordinate system so what is so special here.
abhijeet kumar:
abhijeet kumar:
Sir in starting of talk you discussed about boson stars. Please put some light on that.
Bikram Keshri Behera (M.Sc.-II)
Bikram Keshri Behera (M.Sc.-II)
My question is all about the Pauli's spin matrix.
1. Why all the determinant of Pauli's spin matrix is always -1?
2. How these Pauli's spin matrix formed and can we alternate the three spin matrix?
Kumar Awanish (M.Sc.-II)
Kumar Awanish (M.Sc.-II)
1. Why complex numbers are needed to do operations in quantum mechanics?
Vineetha Vinodh (M.Sc.-II)
Vineetha Vinodh (M.Sc.-II)
1. In analogy with the orbital angular momentum, we write the spin magnetic moment as =g e/2m S ⃗. But how is that possible? How do we know if this is true?
Pushp Raj (M.Sc.-IV)
Pushp Raj (M.Sc.-IV)
1. What is the origin of energy-time uncertainty in Quantum Mechanics, unlike the position-momentum uncertainty which comes naturally from operator algebra?
Aishwarya Priyadarshini Sahoo (M.Sc.-IV)
Aishwarya Priyadarshini Sahoo (M.Sc.-IV)
1. How does a particle originate?
Preeti Dubey (M.Sc.-II)
Preeti Dubey (M.Sc.-II)
1. How do measurements collapse quantum wave function?
Nimain Charan Padhan (M.Sc.-II)
Nimain Charan Padhan (M.Sc.-II)
1. If electrons are particles then how all the electrons are same or identical in this universe &how different matters are formed from identical electrons? (Or why electrons are identical all over the universe?)
Supriya Kumari (M.Sc.-II)
Supriya Kumari (M.Sc.-II)
1. How can we write the quantum wavefunction for multi-particle system or for a real object?
PUSHP RAJ:
PUSHP RAJ:
1. A particle has tunnelled through a barrier region, how much time did it spend inside the barrier?
Question from M.Sc. - II Students
Question from M.Sc. - II Students
Rishi Roushan Bharadwaj
1. The Schrodinger wave equation is a hypothetical equation based on de Broglie hypothesis. So please elaborate on de Broglie hypothesis from both Classical and Quantum point of view.
Kumar Awanish
1. Why complex numbers are needed to do operations in quantum mechanics? Referring to your lecture-14 where you discussed about complex linear vector space, could you please explain this and provide it’s physical interpretation?
Preeti Dubey
1. How do measurements collapse quantum wave function?
2. Can an arbitrary quantum state be efficiently generated?
Nitya Gopal Nayak
1. How can we measure wave-function ?
Aashish Prakash
1. Why fine-structure constant is so important in quantum mechanics, in spite of being so small numerically.
Arpita Palai
1. Is it necessary to consider the correlation in wave function for a two particle interaction?
2. Can a particle be observed while tunneling? What will be its wave length, K. E. while it Tunnel through the barrier?
Sunny Kumar
1. Why quantum tunneling effect occurs and its importance and applications?
Bignesh Dalai
1. My question is, in quantum tunneling how the particle is not losing energy and I am a bit confused about why inside the barrier function decays exponentially?
Anshuman Sahoo
1. Why L2 and Lz are used for measuring angular momentum ?
Vineetha Vinodh
1. In analogy with the orbital angular momentum, we write the spin magnetic moment as . But how is that possible? How do we know if this is true?
Susanta Lenka
1. Does the electron actually spin?
2. Why do we think electron spin as intrinsic property?
3. Does electron spin oppose magnetic flux?
Vivek Cyrus
1. Can we use quantum entanglement for communicating information?
Bikram Keshri Behera
My question is all about the Pauli's spin matrix.
1. Why all the determinant of Pauli's spin matrix is always -1?
2. How these Pauli's spin matrix formed and can we alternate the three spin matrix?
Nimain Charan Padhan
1. If electrons are particles then how all the electrons are same or identical in this universe &how different matters are formed from identical electrons? (Or why electrons are identical all over the universe?)
Sanjukta Jena
1. How do we know the preciseness of patching wave function in the neighborhood of classical turning point?
Supriya Kumari
1. Can we write the quantum wave function for multi-particle system or for a real object?
Priya Kumari
1. Is there any theory explaining the existence of dark matter and dark energy in quantum mechanics?
Abhishek Singh
1. Since the wave function blows up in the vicinity of classical turning point albeit AIRY FUNCTIONS help out to get the connection formula but how do we know these things in a heuristic way?
Jagat Jyoti Satpathy
1. Can a baseball tunnel through a very thin window like the tunneling of electron?
Questions from M.Sc. - IV Students
Questions from M.Sc. - IV Students
Shekhar Suman
1. What do we mean when we say that “Hilbert space is a complete separable vector space.”
2. Why the wavefunction and its derivative cannot vanish at the same point?
Pushp Raj
1. What is the origin of energy-time uncertainty in Quantum Mechanics, unlike the position-momentum uncertainty which comes naturally from operator algebra?
2. A particle has tunnelled through a barrier region, how much time did it spend inside the barrier?
Aishwarya Priyadarshini Sahoo
1. How does a particle originate?
Amit Kumar Gupta
1. Why is it possible to write separable solutions e.g., for Hydrogen atom ?
Riya Dawn
1. Can the velocity of an individual freely evolving particles change with time?
2. Is there an initial state and a position operator valued measure that optimizes the estimates of time?
Abhijeet Kumar
1. We generally talk about spin angular momentum (S) of electron but electron does not rotate on a particular axis. Then how can we understand the spin of electron and it's angular momentum?
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