QUANTUM ZENO AND QUANTUM ANTI-ZENO EFFECTS V. Gontis and B. Kaulakys
نویسندگان
چکیده
It is generally accepted that unstable systems decay according to an exponential law which has been experimentally verified on many quantum systems. However, deviation from exponential decay have been predicted for short as well as for very long decay times. The short-time deviation turns out to be very interesting due to its consequences leading to the so-called quantum Zeno effect – the inhibition of decay by repeated observation in very early stages of evolution. Here we discuss shortly the essence of the exponential and nonexponential (nonlinear) decay and effect of frequent measurements on the induced dynamics of simple and multilevel quantum systems.
منابع مشابه
Quantum Anti–Zeno Effect
The interplay between quantum dynamics and quantum measuments continues to attract attention of physicists since the birth of quantum physics [1]. One of the classic examples of such an interplay is the, so called, quantum Zeno effect [2]. It consists in modifying the quantum evolution by the repeated measurments. The essence of the quantum Zeno effect is that repeated interrogation if the syst...
متن کاملar X iv : q ua nt - p h / 05 02 12 5 v 1 21 F eb 2 00 5 Sufficient conditions for the anti - Zeno effect
The ideal anti-Zeno effect means that a perpetual observation leads to an immediate disappearance of the unstable system. We present a straightforward way to derive sufficient conditions under which such a situation occurs expressed in terms of the decaying states and spectral properties of the Hamiltonian. They show, in particular, that the gap between Zeno and anti-Zeno effects is in fact ver...
متن کاملQuantum Dynamics with Intermediate Measurements in Agreement with the Classical Dynamics B.kaulakys
The effect of repetitive measurement for quantum dynamics of driven by an intensive external force of the simple few-level systems as well as of the multilevel systems that exhibit the quantum localisation of classical chaos is investigated. Frequent measurement of the simple system yields to the quantum Zeno effect while that of the suppressed quantum system, which classical counterpart exhibi...
متن کاملQuantum Zeno and anti-Zeno Effects: An Exact Model
Recent studies suggest that both the quantum Zeno (increase of the natural lifetime of an unstable quantum state by repeated measurements) and anti-Zeno (decrease of the natural lifetime) effects can be made manifest in the same system by simply changing the dissipative decay rate associated with the environment. Here, we present a model which incorporates the effect of the environment in an ex...
متن کاملQuantum Zeno and anti-Zeno effects in classical noise
Most of the existing studies are devoted to the quantum Zeno and anti-Zeno effects in open quantum systems under quantization environment; little attention has been paid to the quantum zeno dynamics behavior under classical noise. In this paper, we analyze the quantum Zeno and anti-Zeno dynamics under the random telegraph noise and the family of low-frequency noise with 1 f ⁄ spectrum. Based on...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998