
JETP, Vol. 69,
No. 6,
p. 1250 (December 1989)
(Russian original - ZhETF,
Vol. 96,
No. 6,
p. 2209,
December 1989
)
Special role of the two-phonon interaction in the problem of quantum tunneling with dissipation in a crystal
Yu. Kagan, N.V. Prokof'ev
Received: July 31, 1989
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