Measuring non-Hermitian operators via weak values
نویسندگان
چکیده
منابع مشابه
Measuring measurement–disturbance relationships with weak values
Using formal definitions for the measurement precision and the disturbance (measurement back-action) η, Ozawa (2003 Phys. Rev. A 67 042105) has shown that Heisenberg’s claimed relation between these quantities is false in general. Here, we show that the quantities introduced by Ozawa can be determined experimentally, using no prior knowledge of the measurement under investigation—both quantitie...
متن کاملMeasuring Confinement via Weak Bisimulation
It is well known that observability is closely related to vulnerability against confidentiality attacks: once a low level process is able to observe differences in the behaviour of a high level process it is able to deduce information about its secrets, and confidentiality is thus at least partially violated. However, if whatever the high level secrets are, the behaviours of the observed proces...
متن کاملCharge sensing amplification via weak values measurement.
A protocol employing weak values (WVs) to obtain ultrasensitive amplification of weak signals in the context of a solid-state setup is proposed. We consider an Aharonov-Bohm interferometer where both the orbital and the spin degrees of freedom are weakly affected by the presence of an external charge to be detected. The interplay between the spin and the orbital WVs leads to a significant ampli...
متن کاملDirect measurement of large-scale quantum states via expectation values of non-Hermitian matrices
In quantum mechanics, predictions are made by way of calculating expectation values of observables, which take the form of Hermitian operators. Non-Hermitian operators, however, are not necessarily devoid of physical significance, and they can play a crucial role in the characterization of quantum states. Here we show that the expectation values of a particular set of non-Hermitian matrices, wh...
متن کاملHermitian Young Operators
Starting from conventional Young operators we construct Hermitian operators which project orthogonally onto irreducible representations of the (special) unitary group.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2015
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.92.052120