It is well-known that thoughts cease to exist during samadhi. It can be achieved in different ways after a long sadhana.
This question is about sukshma samadhi which is experienced by every human daily. But they are unrecognized by her due to several reasons. One among them is the infinitesimal property of time of samadhi.
You can read in detail about sushma samadhis in Tripura Rahasya
Thus requested, Janaka replied:
"Listen, O Brahmin! the following are instances of that state: when a man remains unaware of 'in and out' for a short interval and is not overpowered by the ignorance of sleep; the infinitesimal time when one is beside one-self with joy; when embraced by one's beloved in all purity; when a thing is gained which was intensely longed for but given up in despair; when a lonely traveller moving with the utmost confidence is suddenly confronted with the utmost danger; when one hears of the sudden death of one's only son, who was in the best of health, in the prime of life, and at the apex of his glory. There are also intervals of Samadhi, namely the interim period between the waking, dream and sleep states; at the time of sighting a distant object, the mind holding the body at one end projects itself into space until it holds the object at the other end, just as a worm prolongs itself at the time of leaving one hold to catch another hold. Carefully watch the state of mind in the interval.
Afaik, a sadhaka whose kundalini reaches sahastra can only achieve samadhi. But, is it same with the sushma sadhi? Does kundalini reaches sahastra during those infinitesimal time and then returns back to muladhara instantly during sushma samadhi?