Abstract
We discuss a type of measurement in which a macroscopically large angular momentum (spin) is "created" nonlocally by the measurement of just a few atoms from a double Fock state. This procedure apparently leads to a blatant nonconservation of a macroscopic variable-the local angular momentum. We argue that while this gedankenexperiment provides a striking illustration of several counter-intuitive features of quantum mechanics, it does not imply a non-local violation of the conservation of angular momentum.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1783-1791 |
| Number of pages | 9 |
| Journal | International Journal of Theoretical Physics |
| Volume | 51 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2012 |
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Keywords
- Bose-Einstein condensate
- Nonlocality
- Quantum measurement
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Mathematics(all)
Cite this
Nonlocal Appearance of a Macroscopic Angular Momentum. / Paraoanu, G. S.; Healey, Richard A.
In: International Journal of Theoretical Physics, Vol. 51, No. 6, 06.2012, p. 1783-1791.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonlocal Appearance of a Macroscopic Angular Momentum
AU - Paraoanu, G. S.
AU - Healey, Richard A
PY - 2012/6
Y1 - 2012/6
N2 - We discuss a type of measurement in which a macroscopically large angular momentum (spin) is "created" nonlocally by the measurement of just a few atoms from a double Fock state. This procedure apparently leads to a blatant nonconservation of a macroscopic variable-the local angular momentum. We argue that while this gedankenexperiment provides a striking illustration of several counter-intuitive features of quantum mechanics, it does not imply a non-local violation of the conservation of angular momentum.
AB - We discuss a type of measurement in which a macroscopically large angular momentum (spin) is "created" nonlocally by the measurement of just a few atoms from a double Fock state. This procedure apparently leads to a blatant nonconservation of a macroscopic variable-the local angular momentum. We argue that while this gedankenexperiment provides a striking illustration of several counter-intuitive features of quantum mechanics, it does not imply a non-local violation of the conservation of angular momentum.
KW - Bose-Einstein condensate
KW - Nonlocality
KW - Quantum measurement
UR - http://www.scopus.com/inward/record.url?scp=84860615936&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84860615936&partnerID=8YFLogxK
U2 - 10.1007/s10773-011-1056-8
DO - 10.1007/s10773-011-1056-8
M3 - Article
AN - SCOPUS:84860615936
VL - 51
SP - 1783
EP - 1791
JO - International Journal of Theoretical Physics
JF - International Journal of Theoretical Physics
SN - 0020-7748
IS - 6
ER -