What is the point to study Anti-bunching?

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The study of anti-bunching and photon blockade is crucial for advancing single photon sources, which have significant implications in various fields. These effects are essential for enhancing technologies in quantum cryptography, where secure communication is paramount. Understanding anti-bunching can lead to improved quantum information processing and photonic devices. Researchers are exploring these phenomena to unlock new applications in quantum computing and secure data transmission. The relevance of anti-bunching extends beyond theoretical physics, impacting practical technologies in the real world.
Lizzie Mann
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I see lots of scientists study photon blockade and anti bunching effect. It confuses me so much that even though anti bunching and photon blocked are observed. But in what way the study of these two effects would affect any fields of our world, or the scientific research?
 
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The "real world" application of an anti-bunching experiment would be to study single photon sources. These in turn are useful in all sorts of situations, most notably in quantum cryptography.
 

Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
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