An exactly solvable model of an avalanche-type measuring device

Europhysics Letters

Volumn 76, Issue 4, 2006, Pages 541-546

  Merlin, R ^a  

^a UNIVERSITY OF MICHIGAN   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 33751256277     PISSN: 02955075     EISSN: 12864854     Source Type: Journal    
DOI: 10.1209/epl/i2006-10308-1     Document Type: Article

References (26)

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15. There are many reasons for avoiding superpositions of vacuum states, not only in cases where the ground state is degenerate, such as in a ferromagnet, but also for systems with metastable phases (e.g., graphite and diamond). However, we do not know of any argument that forbids the existence of such Schrödinger cat like states.
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21. Europhys. Lett., 61 (2003) 452. However, their approach rests on the assumption that the coupling energy is proportional to the number of particles constituting the detector.
22. By performing a simple change of variables, it can be shown from eq. (5) that eq. (6) applies as well for odd N and E > NhΩ.
23. The author is grateful to S. FAHY for calling his attention to the gravitational analogy.
24. N |0>.
25. iφ (arbitrary φ).
26. See, e.g., SHIMIZU A. and MIYADERA T., J. Phys. Soc. Jpn., 71 (2002) 56, and references therein.