Talk:Zero-point energy

A doubt
"All quantum mechanical systems have a zero point energy" — Really? What exactly does it mean? In particular, what is the zero point energy of a free particle (basically the same as harmonic oscillator of zero frequency)? --Boris Tsirelson 14:18, 25 December 2010 (EST)

Also Paul Wormer does not like this phrase. I delete it. --Boris Tsirelson 09:03, 28 December 2010 (EST)