I'm not sure how to activate or direct the link, but I've definitely perceived it before, in several different ways. It's even happened without the influence of psychedelics, but I don't think I would have recognized it without my experience with psychedelics. Whether love or anger, it would seem the internal emotional intention of a person can be shared or leaked if it's intense enough.
With a few different lovers and best friends, I've had this link of synchronized communication. I may be thinking about them, intending to ask them a question or share a thought with them; then boom, I get a text, call, email, they pop around the corner, etc. Some may say coincidence, but it's happened often and strangely enough to catch my attention.
I've also noticed a link with my parents, specifically my father. Several times last year I would awaken from intense dreams where my father and I were arguing. There was a lot of stress and spiritual turmoil in the household, and my father's always been an archetype of anger and discipline in my life. These nightmares were notably more vivid than the average dream and were always followed by an intense argument with my father in real life. Even when I had one of the dreams while out of town, I later discovered that my dad had found reason to become furious with me in that same moment.
I saved the best and most relevant accounts for last... One of my best psychonaut friends and I have had two separate incidents of 'telepathy' with Ayahuasca. It was like two people approaching each other and both choosing to divert in the same direction to avoid colliding. Followed by additional diversions to untangle each other from the same path. It's unexpected, funny, and probably not intentionally replicatable. The first time, we caught each other's glance and seemed to recognize the exact same thought in each other's eyes, followed by parallel looks of astonishment, then acknowledgement, disbelief, and hilarity. Was an entirely silent interaction that lasted about 30 seconds that we were both aware and focused on. It even felt somewhat natural and familiar, until we burst out laughing from the strangeness of it and dissipated back into separate egos. We later reviewed the exchange, affirming the synchronicity.
The second time, we were two of 7, taking pharma together on valentine's this year. Was a beautiful night with very compassionate and aware people, allowing for lots of similar, less intense links that I was perceiving. Most notably though was toward the end of the night when everyone was relaxing in silence as my same friend played some freestyle guitar. I was writing in a notebook and listening, rocking in my chair. During one of the twangs, I could feel this energy of emotion whip up my back, and I involuntarily shrugged my shoulder to the beat. I immediately took notice of this loosened gesture and realized it was not just foreign, but the exact way my friend playing guitar normally shrugs his shoulders in a gesture of relief. Before I could even turn halfway to look back at my friend sitting behind me, he let out this guffaw of astonishment, and I knew he'd just seen what happened and recognized it too. I gave him a chuckle and nod of acknowledgement; the rest was known.