Ashish Kumar Meena / Manisha Yadav
Two of the greatest theories in science Quantum mechanics and general relativity each describe the universe with extraordinary success. Yet when physicists try to unite them, the mathematics collapses. Nowhere is this tension more vivid than in the extreme environments of the cosmos: the hearts of black holes, the first instants after the Big Bang, the dense interiors of neutron stars, and the faint ripples of gravitational waves. In Breaking Spacetime: Where Quantum Mechanics Meets Astrophysics (Volume II) invites readers into that fracture. Beginning with the two pillars of modern physics, the book travels through the astrophysical laboratories where quantum effects and strong gravity collide. It then explores the leading theoretical attempts to heal the divide string theory, loop quantum gravity, holography and the AdS/CFT correspondence, and the radical idea that entanglement itself may weave the fabric of spacetime (ER = EPR). Along the way, readers encounter Hawking radiation, the Bekenstein-Hawking entropy, the black-hole information paradox, cosmic inflation and quantum seeds of structure, dark matter and dark energy as quantum-field phenomena, and the still-open quest for a theory of everything. Key equations appear in accessible form, explained so that both newcomers and trained readers can follow the reasoning. Written as a work of scientific popularization grounded in rigorous physics, this volume is for anyone who has wondered what happens when the smooth geometry of Einstein meets the granular uncertainty of the quantum world and why finding a common language remains one of the great unfinished projects of science. A journey to the frontier where the smallest particles shape the largest structures in the universe.
