Blog #1
Wednesday, May 28, 2025
"Past is key to the Future"
Thursday, February 13, 2025
Requiem for a Dream
(From the archives)
I stumbled upon a small piece of text hidden in my Google Drive, dating back to the summer of 2019 - it feels like a lifetime ago.
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As the Howrah Bridge rose above the horizon, she inched closer, clasping my arm. We knew the journey was coming to an end. A sudden uneasiness started to grow within me. I no longer sensed her tight grasp, the warmth from her purple sweater or swaying of the bus overtaking traffic on the Strand Road. A familiar aroma then filled my surroundings. As I tried to look further, my vision was blurred by a blanket of rain. The sensory tussle quickly came to an end as I felt another cold spray of water against my face. Waking up with a shudder, I noticed my wife towel-drying her hair after her shower. I stood up and hugged her tightly. Upon releasing she noticed tears in my eyes and asked, “Were you crying!?”.
“No…, it's your wet hair”, I lied.
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Sunday, December 1, 2024
Look! The cat is back........
".....Tu samajh nehi raha....woh bhi humare tarha hi hain.....pyaar paane ke liye aati hain kyuki khaana to ghar pe bhi milta hain...."
Monday, June 26, 2023
Philosophy of Science
A number of physicists in the 20th Century promoted the idea that beauty is a useful criterion of truth in fundamental physics? Also, intuition is sometimes mentioned as a good guiding light in research. Do you agree?
Sir Richard Feynman once said, “You can always recognize the truth by its beauty and
simplicity”. ‘Feynman diagrams’ bear witness to this statement as they greatly simplify the
representation of otherwise complicated interparticle interactions taking place at less than one
femtometer scale. One of the greatest and most famous theories- The General Theory of
Relativity which reduces gravity from being a force to being a feeling is at heart a huge
simplification. Last but not least, any hard-core theorist working on fundamental problems in
physics would agree that ‘The principle of Least action’ is the simplest description of our
Universe! But truly is it that simple? Are physicists romanticizing the idea of two rather ugly
equations precisely demonstrating how a cylinder rolls down an incline? Einstein himself
remarked, “Make everything as simple as possible, but not simpler”. It all begins quite intimately
with one proton and one neutron approaching each other to ‘interact’ then all of a sudden they
produce a bunch of offspring using up all the Greek alphabets! However, if we want to elaborate
on ‘interact’, it certainly is not simple anymore. At Least not at face value (looks). Only when we
start to delve deeper do we realize that the way a particle (person) behaves is deeply connected
to some fundamental (internal) properties (traits) such as charge (say e.g. confidence), mass
(introverted), and spin (openness). At this point, some would stop digging deeper but a quantum
field theorist (or a psychotherapist) would love to know the origin of these characteristics. Thus
they find out about sub-particles like quarks and Higgs-bosons which are more fundamental
(like someone’s past experiences or upbringing) using which an entire macroscopic description
of neutron-proton collision (behavior) is possible! The journey from top to bottom and then back
to the top is a one-way journey and is factually the same for everyone. For example, it is a fact
that light always takes the shortest path between two points. This is a very deep concept, still, it
can be interpolated to a more common and straightforward fact- Light travels in a straight line (in
plane geometry). This fact is a result of Fermat's principle postulated in the mid-17th century
and remains valid in all geometries. This is what makes it appealing. The flexibility to
disintegrate it from complicated mathematics to simple terms is what makes a theory beautiful.
“Nature conceals her secrets because she is sublime, not because she is a trickster”-Einstein.
Hence, the truth lies in simplicity, flexibility, and transparency. Conversely, a theory with
exceptions (detours along that journey) ends up being ‘truly’ complicated and too incredible to
believe.
Of course, as the old saying goes, “beauty is in the eye of the beholder” (Molly Bawn by
Margaret Wolfe Hungerford, published in 1878), everything boils down to the group of people
(beholders) to judge whether a theory can be labeled as truly beautiful or oversimplified or
unnecessarily complicated. But ‘facts’ or in some cases ‘universally agreed upon notions’ are
common to any arbitrary group of investigators and should be a natural consequence of that
theory (when verified in independent ways). The word ‘simple’ or ‘beautiful’ when used without
caution can become a misnomer. In reality, all ideas or concepts can be complicated. But what
makes some of them truly beautiful is their internal self-consistency! Beautiful theories are built
from first principles, they are mathematically sound and they can properly explain a certain
physical phenomenon across all scales! Such lofty expectations which come with truly ‘beautiful’
theories often end up describing fundamental physics because she (nature) is sublime. And
such beauty and simplicity are evident at any stage the enthusiast decides to stop along the
round-trip journey.
Intuition, in my opinion, paves the pathway for developing ideas. Without intuition, it is
hard to begin working on a fundamental problem. Since genuine intuition originates only from a
mind which is whole-heartedly immersed in specific thoughts, we can safely say it can be a
guiding light for research. As rightfully stated by Einstein, “The only real valuable thing is
intuition; The intellect has little to do on the road to discovery. There comes a leap in
consciousness, call it Intuition or what you will, the solution comes to you and you don't know
how or why”. While the science of molecular bonds was comparatively well known in the early
19th century, it was the dream of a ‘snake’ catching its tail that allowed Kekule to carry forward
the known facts of chemistry to discover the structure of benzene! Newton’s mind was entirely
into Galileo's works on dynamics when he happened to notice the fruit fall. This stimulated his
mind to attach the idea of an invisible force pulling everything towards itself. Of course, it was
followed by mathematical rigor which justified everything. Taking things a little further, Einstein
famously said that the greatest feeling of his life was witnessing a man falling from his roof! His
intuition took him from being an external observer of falling objects to actually being the falling
object. This very idea is now the fundamental building block of the General Theory of Relativity,
that is, gravity switches off for a body under constant acceleration! Hence, I strongly believe in
the notion that all the greatest ideas or theories are a result of small eureka moments. At every
stage of formulating an idea or theory, those eureka moments get validated by already-known
facts. ‘Intuition’ is what stitches two sets of (sometimes unrelated) facts. But oftentimes, our
‘sixth sense’ could be fooling us and everyone else. Borrowing from Wikipedia the Monty Hall
problem states, “Suppose you're on a game show, and you're given the choice of three doors:
Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host,
who knows what's behind the doors, opens another door, say No. 3, which has a goat. He then
says to you, "Do you want to pick door No. 2?" Is it to your advantage to switch your choice?”.
Even Though our gut might be telling us, “Stick with your choice”, mathematics has shown that
it's always worth switching which has the higher probability to win! The problem is
counter-intuitive when we extend from three doors to say one-hundred doors. When the host
reveals 98 doors that have a goat behind them, our gut will be telling us to switch from our initial
choice. Hence to examine whether our ‘sixth sense’ is not fooling us or others, it must be
followed by a proper examination. Without proper testing, intuition must not be promoted as true
science.
I am currently working on accretion around supermassive black holes called Active Galactic
Nuclei (AGNs). I study them in the X-ray energy range. There is a lot of room for intuitive ideas
in this field especially because it is very model dependent as of now. The X-ray observational
community still doesn't have access to good-quality data because it is difficult to observe X-rays
from an engineering point of view. Hence, we look forward to innovative ideas which can better
explain not just in X-rays but also in the full electromagnetic spectrum, since AGNs shine across
all wavebands. We know very little about the space near black holes. Existing theories provide
the foundation for building intuition which can then be mathematically modeled and fitted to
data. Light rays get bent near the blackhole and focussed on the accretion disk which then gets
reflected. This was an initial guess back in the 70s. Reflection changes the polarization state of
a wave (whose theory was already known for a century) and this simple fact has been
confirmed today with the help of state-of-the-art telescopes. This is one of the very many ideas
which is taking the field forward despite its shortcomings. However, it is worth mentioning that
our results are true only if we believe the data being received by highly sophisticated machinery
located thousands of kilometers from us and operated by space agencies is correct! If not, we
must like science fiction! But fundamentally speaking, the world operates on our faith. Without a
certain amount of faith, existence is meaningless. I have faith in the structural engineer who
designed my building. I take it for granted that NASA is not hiding from us the fact that an
asteroid is going to decimate our city by the next dawn. A certain amount of (blind) faith is what
keeps me going in this field of research.
To sum up, despite its limitations, intuition appears to be a crucial part of human thinking,
according to research. The ability to link seemingly unrelated events is said to aid us in
understanding the chaos of the outside world, while others contend that it is essential to our
ability to perceive events immediately.
Sunday, February 19, 2023
Schönbrunn Palace
While fowl hunting in the Katterburg estate of Austria, Emperor Matthias, third son of archduke Maximilian, discovered a "fair-spring" or Schön-Brunn in the middle of a forest which led to its present-day name. Schönbrunn Palace is one of the main attractions in Vienna, luring scores of tourists from all corners of the world. Blended in its architectural magnificence is the brilliance and foresight of a powerful woman, the heiress to Emperor Charles VI, Maria Theresa.
Maria Theresa was the daughter of Emperor Charles VI and Elisabeth Christine. They were the ruler of the Habsburg empire in Austria. Having lost all hopes of bearing a son, Emperor Charles and his wife decided to find a suitable match for Maria Theresa, who could rule on her behalf. She was then married off to Franz Stephan of Lorraine.
Although deeply in love with Franz Stephen, Maria Theresa disregarded her father's idea behind this marriage. Rather she took full charge of the monarchy and led from the front, defending the Habsburgs against several invasions (Silesian war). In total, Franz and Maria had sixteen children. While being a fiery figure in front of adversities, she was also a strict mother to her children, imposing a proper catholic upbringing. The Schönbrunn Palace was the summer house of the Habsburgs.
- Don't carry handbags or bigger luggage. They are not allowed inside the main palace building. The same applies to plastic water bottles. You will definitely feel thirsty so either buy from some shops like the one near the zoo gate or just drink from the water spring behind the Gloriette.
- The entire compound will easily take two days to see. So plan accordingly if you want to see literally everything.
- If you don't have a mobile network, there is open Wi-Fi on the right side of the main entrance gate.
- Visit during September/October. It will be mildly cool at the same time being sunny.
Saturday, December 24, 2022
City of Joy
This is the Howrah Bridge (in Kolkata) viewed from a departing airplane at midnight. If one stretches their imagination a little, one will notice that the bent shape of the Howrah Bridge resembles a subtle smile. She is smiling back at you as you leave the city for another city. She wishes you the very best for your future.
However, secretly, She also knows for a fact that no matter how modern and flashy other cities are, they won't be a city with a 'heart'. The reason why Kolkata is called the "City of Joy" is because Kolkata is a city with a heart, with a soul.
Here is my city in pictures. I have tried to uphold the essence of Kolkata, which always refuses to give up its originality and integrity in the face of surmounting pressure.
1. Howrah Bridge (obscurely known as Rabindra Setu) is built on the Ganga river. It was imagined by George Turnbull in 1935 and opened in 1943. It is currently the sixth-longest cantilever bridge in the world. On the left side of the bridge is one of the busiest railway stations in the world- the Howrah Railway Station. Do you notice the iconic yellow taxis? As of now, it only operates in Kolkata.

3. MG road or Mahatma Gandhi Road. If you ask me, this has got to be the most chaotic road in the whole world! But despite all chaos, everything somehow works. It connects important places like College Street, Presidency University, Sealdah Station, and Hatibagan. The Barra-bazaar is located here and is a huge flea market exploited by wholesalers across North India.
7. Great personalities: In case you stumbled upon these famous names, they were from Kolkata or were closely associated with the city...(By no means this list is exhaustive. It is impossible to list all the famous personalities in a single post.) I will keep complementing it from time to time.
Satyendra Nath Bose. The founder of Bose statistics and Bosons (half of the fundamental particles in the standard model) is named after him. He proved the Planck Radiation formula without any ad-hoc assumptions or classical theory but using only pure mathematics. He closely collaborated with Albert Einstein and developed the theory of Bose-Einstein Condensate.
Sarat Chandra Chattopadhyay. He was a Bengali novelist and short story writer of the early 20th century. Notable works: Srikanta, Choritrohin, Devdas, Parineeta, and Pother Dabi. His works have been translated into several Indian languages and also adapted into movies (Parineeta and Devdas).
Friday, August 26, 2022
It does not die
July 2022:
A typical rainy day in Kolkata. Since dawn, it had been raining periodically leaving behind a damp setting across the city streets. I found myself standing in front of the College Street book market, with an umbrella in one hand and a list in the other.
Out of the very many iconic places in the city, College Street has seen the least amount of modification over the years. Nothing has changed except for the introduction of UPI payment (online payment) by shopkeepers now. The streets stay littered the same way, the jolly 'Jhal-muri' uncle never left his spot in front of Presidency University, and the 'ghugni' sold at College Square tasted exactly the same as it used to, three years ago. Time seems to have frozen in this place. The streets have survived the pandemic, the deadly 'Amphan', economic meltdown and so much more. But somehow the love for books among Bengalis has kept this place alive.
Legend has it that there isn't a book in this world that is not available at College Street. Who knew that day I would be putting this old adage to the strictest of tests?
Among the seven or eight books listed, I was particularly looking forward to two books. La Nuit Bengali by Mircea Eliad and It does not die by Maitreyee Devi. I wouldn't call myself a romance reader but these two books were unique in some respects. To begin with, they are true accounts set in the colonial Calcutta (now called Kolkata) of the 1930s. Secondly, the part which attracted me the most was the backdrop behind these two novels. In La Nuit Bengali, Alan (represents Mircea Eliad), a 23-year-old Romanian engineer describes his romantic adventures involving a sixteen-year-old Maitreyee Devi. However, their love ends in tragedy. Forty years later, Maitreyee Devi finds out that a book has been addressed to her by Mircea Eliad. She then writes It does not die, where she accounts for her side of the entire affair and how she had perceived all that had transpired. In sorts, It does not die is a reply to La Nuit Bengali.
Starting off from the right-hand side of the book market, I asked every shop if they had them. Except for one seller, no one had ever heard of those two books. I was shocked, I must say. I searched the entire right flank of books but with no success. Not even a silver lining. It was a tough pill to swallow considering I was standing at the legendary College street. Now I went to more branded stores like Deys, National Book Store, Kotha-o-Kahini, and others. None had them. I checked my phone, it was 13.30 pm. I had plans of catching the 14:10 Tarakeshwar local train from Howrah station but that seemed impossible now. On top of that, the sky became overcast. Nevertheless, I was already drenched in sweat so it would have made no difference.
As I was making my way out of the busy market along the left flank, a very old bookshop on the right caught my eye. For a moment I stood there and murmured to myself-"let's give it one more try". I handed the owner, a list that had the names of the two books. Suddenly his eyes started scanning the cobweb-filled dusty bookshelf near the ceiling. Then he signaled the helper boy to pick out two books from the left. A minute later, I could see, resting in front of me, La Nuit Bengali and It does not die. "Ask, and it shall be given to you; seek, and ye shall find; knock, and it shall be opened unto you". College Street had passed its test, like always! Likewise, the bookshop owner was stunned to see someone come to buy these very rare books. He said they have been sitting on the shelf for over 6 years. I thanked him and then made my way toward College Square.
The rain was now reduced to a light drizzle. I took this opportunity to sit on the benches and glance through the books. I could never fight this childish urge to read a few pages of a book, the moment it was bought.
"Past is key to the Future"
( Source: Google images ) Much like looking at rock strata formed over millions of years, observing distant stars, galaxies, or cosmic event...

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The Fire The jungle was getting thicker, miles and miles a stretch; Calm and eerie, murky and green, The sun was nowhere to be seen, And n...
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While fowl hunting in the Katterburg estate of Austria, Emperor Matthias, third son of archduke Maximilian, discovered a "fair-sp...
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A number of physicists in the 20th Century promoted the idea that beauty is a useful criterion of truth in fundamental physics? Also, intui...