Are gods(as psychological products of the human minds)that people believe in existent in some subjective way and...?

1Cor 8:6 says there are many gods in heaven. its also many verses about idols and deities that are not real. some are real but many can be found to be fallen angels or the worship of satan. there really is only ONE God to us. and there really is a Savior /redeemer who atones for us and is a high priest and advocate between us and Heavenly Father.  and there is also the Holy Ghost, and the 3 rule in heaven over earth. Jesus himself says he received the throne of God by overcoming all things. see Rev 3:21 kjv.  and in Rev 21:7 he says to John He will be our God and we will be His "sons".  to me that's the best bible verse about exaltation in the whole book. but the previous verse talks about exaltation  as an invitation, to US, if we overcome all things. i have stood in the Presence of Jesus. i KNOW Jesus is real, i have seen an angelic personage appear in my bedroom. i know that angels exist, even though many people say it was satan appearing as an angel of light. even still, this proves there is a God ! 

I would say no.  

The idea of something existing is not the same thing as existing. Trying to blur the lines between the two is mistaking the map for the territory, a kind of equivocation fallacy.  

The idea of Superman existing doesn't make Superman exist in our reality.  If you want to say that there when someone thinks of Superman, that there is some sort of measurable brain chemical, sure.  But, what is Superman?  Is he hero from the planet Krypton, or a melange of dopamine, glutamate, and serotonin?

So, sure, you can probably point to studies showing praying and meditation that actually do have some sort of measurable physical effect on the brain.  But, that doesn't mean the god is real.

As for 'psychic energy fields' and the like, I think that's just woo and hucksterism.  

Christianity is a way of life. One knows that in their heart.Once experienced you know in your heart that you interacted with a force beyond the human force. JESUS BLESS YOU

That's what the ancient hebrews and Romans did, but the Roman ones were stronger than the hebrew one. The jews lost two wars.

That's what Shadowfire believed a couple years ago.

Think of them more as created beings of pure energy. They have to be fed, and what feeds them is worship. Gods and goddesses who are not worshipped eventually die off.