منابع مشابه
Watching the Clock: Quantum Rotation and Relative Time
A consistent theory of nature must account for both microscopic quantum waves and macroscopic relativistic particle trajectories. In the recent "New Quantum Paradigm", locally realistic rotating vector fields comprise fundamental particles with spin. These same coherent quantum rotators constitute local clocks that define local time, in a way that agrees with general relativity to first order, ...
متن کاملRelative states, quantum axes and quantum references
We address the problem of measuring the relative angle between two ‘quantum axes’ made out of N1 and N2 spins. Closed forms of our fidelity-like figure of merit are obtained for an arbitrary number of parallel spins. The asymptotic regimes of large N1 and/or N2 are discussed in detail. The extension of the concept ‘quantum axis’ to more general situations is addressed. We give optimal strategie...
متن کاملQuantum Computation Relative to Oracles
The study of the power and limitations of quantum computation remains a major challenge in complexity theory. Key questions revolve around the quantum complexity classes EQP, BQP, NQP and their derivatives. This paper presents new relativized worlds in which (i) co-RP * NQE, (ii) P = BQP and UP = EXP, (iii) P = EQP and RP = EXP, and (iv) EQP * Σ 2 ∪Π P 2 . We also show a partial answer to the q...
متن کاملInequalities for Quantum Relative Entropy
Some logarithmic trace inequalities involving the notions of relative entropy are reobtained from a log-majorization result. The thermodynamic inequality is generalized and a chain of equivalent statements involving this inequality and the Peierls-Bogoliubov inequality is obtained.
متن کاملModulation Response and Relative Intensity Noise Spectra in Quantum Cascade Lasers
Static properties, relatively intensity noise and intensity modulation response in quantum cascade lasers (QCLs) studied theoretically in this paper. The present rate equations model consists of three equations for the electrons density in the conduction band and one equation for photons density in cavity length. Two equations were derived to calculate the noise and modulation response. Calcula...
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: Foundations of Physics
سال: 2019
ISSN: 0015-9018,1572-9516
DOI: 10.1007/s10701-019-00268-w