This claim would require citation and such a citation does not exist.
A proper test of that claim would require a poll, but since most physicists are not signed up for cryonics, don't make public statements endorsing it, and when specifically interviewed about it say they don't believe cyronics works, it seems fair to infer that most physicists indeed don't believe cyronics works.
Most physicists have not thought about the subject one way or the other.
What makes you believe that? Cryonics is relatively well known among scientifically educated audiences. it's even the main plot device of a tv show aimed at general audiences (Futurama).
Moreover, physicists are usually atheists, therefore in principle they should have no religous objection to cryonics.
Moreover, most physicists (those who don't have particular expertise in information theory) are not particularly qualified to evaluate the subject except, of course, as intelligent laymen.
Seriously, where do you think information theory comes from? And do you actually even know what information theory is about? Because people here seem to be using the term as a buzzword without actually using any information theory in their arguments.
t is possible to find neuroscientists who are not aware of their own incompetence outside their area of expertise and who claim that cryonics cannot work.
Except that cryonics is actually in their area of expertise. And in the area of expertise of cryobiologists (the people who cryopreserve tissues in a way that can be shown to actually work). What do cryobiologists say about cryonics? I bet you already know the answer...
The private_messaging account is one of the many identified sockpuppets of a persistent troll.
Irrelevant ad hominem.
What makes you believe that? Cryonics is relatively well known among scientifically educated audiences. it's even the main plot device of a tv show aimed at general audiences (Futurama).
You seem to be suggesting that the knowledge physicists have about cryonics is based on their generalist knowledge as educated layment. You further observe that much of this knowledge comes from fictional evidence in popular culture. I heartily agree.
Seriously, where do you think information theory comes from?
Physics and mathematics. My comment doesn't suggest other...
In the past, the Cryonics Institute has had a policy that said that they would not accept anyone who is not a member. This has changed. The policy now is that someone who has full legal authority over your body can sign you up after you die. It costs $36,250 to be frozen if you are not signed up, which is more expensive. They also will not do anything until you have been on dry ice for 2 weeks after they have been contacted, so not being a member is more risky.
This is very important news for anyone who is currently cryocrastinating. It means that you can drastically increase your chances of survival without filling out any forms. All you have to do is tell a loved one you want to be frozen upon death, and that you would like them to take responsibility for making sure this happens. This takes literally 30 seconds. Do it now!
This news might also be a reason to not sign up right away, if you think something better (like radical life extension or uploading) will come along in your lifetime. We should discuss this in the comments.
Edit: The general consensus of this discussion is that this is a really bad reason not to sign up for cryonics.