Results 41 to 50 of about 124,365 (283)

Transformations of superpositions by means of incoherent operations [PDF]

Scientific Reports, 2020
AbstractIn this paper we study how the coherence of a superposition of pure states is related with the coherence of its components. We consider two pure initial states and two pure final coherent states, such that the former ones cannot be transformed into the latter ones by means of incoherent transformations.
Losada, Marcelo, Bosyk, Gustavo M., Freytes, Hector, Sergioli, Giuseppe   +3 more
openaire   +4 more sources

The measurement problem in quantum mechanics

Science & Philosophy, 2019
In this paper, we discuss the importance of measurement in quantum mechanics and the so-called measurement problem. Any quantum system can be described as a linear combination of eigenstates of an operator representing a physical quantity; this means ...
Alessio Giuseppe Ferraioli, Canio Noce
doaj   +1 more source

Experimental implementation of arbitrary entangled operations

New Journal of Physics, 2020
Quantum entanglement lies at the heart of quantum mechanics in both fundamental and practical aspects. The entanglement of quantum states has been studied widely both theoretically and experimentally, however, the entanglement of operators has not been ...
Seongjin Hong, Chang Hoon Park, Yeon-Ho Choi, Yong-Su Kim, Young-Wook Cho, Kyunghwan Oh, Hyang-Tag Lim   +6 more
doaj   +1 more source

Quantum information transport to multiple receivers

, 2005
The importance of transporting quantum information and entanglement with high fidelity cannot be overemphasized. We present a scheme based on adiabatic passage that allows for transportation of a qubit, operator measurements and entanglement, using a 1-D
Andrew D. Greentree, J. Siewert, Lloyd C. L. Hollenberg, M. A. Nielsen, Simon J. Devitt   +4 more
core   +1 more source

Targeting qubit states using open-loop control [PDF]

, 2003
We present an open-loop (bang-bang) scheme which drives an open two-level quantum system to any target state, while maintaining quantum coherence throughout the process.
C D Helon, Fortunato M, Gardiner C W, Goetsch P, Khaneja N, Khaneja N, Khaneja N, Khaneja N, Knill E, Lidar D A, Mancini S, Nielsen M A, Palma G M, Protopopescu V, R Perez, Scully M S, Tombesi P, Tombesi P, Tombesi P, Tombesi P, V Protopopescu, Viola L, Viola L, Viola L, Vitali D, Walls D F, Weiss U, Wiseman H M, Wiseman H M, Wiseman H M, Zanardi P   +30 more
core   +2 more sources

Superpositions for nonlinear operators. I. Strong superpositions and linearizability

Journal of Mathematical Analysis and Applications, 1972
AbstractA notion of superposition for nonlinear operators is defined and strong and weak superpositions are distinguished. The classification and representation of operators having a strong superposition is treated. The algebra induced by the superposition on the domain of operators with strong superpositions, as well as their relation to linearizable ...
openaire   +2 more sources

Superposition operator problems of Hölder-Lipschitz spaces

Demonstratio Mathematica
Let ff be a function defined on the real line, and Tf{T}_{f} be the corresponding superposition operator which maps hh to Tf(h){T}_{f}\left(h), i.e., Tf(h)=f∘h{T}_{f}\left(h)=f\circ h. In this article, the sufficient and necessary conditions such that Tf{
Niu Yeli, Wang Heping
doaj   +1 more source

Measurement- and comparison-based sizes of Schrödinger cat states of light [PDF]

, 2014
We extend several measurement-based definitions of effective superposition size to coherent state superpositions with branches composed of either single coherent states or tensor products of coherent states. These measures of superposition size depend on
Volkoff, TJ, Whaley, KB
core  

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Results from Shell Model Monte Carlo Studies [PDF]

, 1997
We review results obtained using Shell Model Monte Carlo (SMMC) techniques. These methods reduce the imaginary-time many-body evolution operator to a coherent superposition of one-body evolutions in fluctuating one-body fields; the resultant path ...
D. J. Dean, Dean DJ, Dobaczewski J, K. Langanke, Reinhard PG, S. E. Koonin, Vasenko AA, Warburton EK, Wildenthal BH   +8 more
core   +2 more sources