Results 21 to 30 of about 654,704 (296)

Observation of Quantum Hall Valley Skyrmions [PDF]

, 2005
We report measurements of the interaction-induced quantum Hall effect in a spin-polarized AlAs two-dimensional electron system where the electrons occupy two in-plane conduction band valleys.
E. P. De Poortere, M. Rasolt, M. Shayegan, N. C. Bishop, S. Misra, Y. P. Shkolnikov   +5 more
core   +1 more source

Optimal quantum observables [PDF]

Journal of Mathematical Physics, 2017
Various forms of optimality for quantum observables described as normalized positive-operator-valued measures (POVMs) are studied in this paper. We give characterizations for observables that determine the values of the measured quantity with probabilistic certainty or a state of the system before or after the measurement.
Haapasalo Erkka, Pellonpää Juha-Pekka
openaire   +4 more sources

Observation of interaction-induced phenomena of relativistic quantum mechanics

Communications Physics, 2021
Relativistic quantum mechanics is typically used to describe phenomena of high-energy physics but can also be applied to describe some features of quantum materials.
Weixuan Zhang, Hao Yuan, Wenjing He, Xingen Zheng, Na Sun, Fengxiao Di, Houjun Sun, Xiangdong Zhang   +7 more
doaj   +1 more source

Unambiguous joint detection of spatially separated properties of a single photon in the two arms of an interferometer

Communications Physics, 2023
The quantum superposition principle implies that a particle entering an interferometer evolves by simultaneously taking both arms. If a non-destructive, minimally-disturbing interaction coupling a particle property to a pointer is implemented on each arm
Surya Narayan Sahoo, Sanchari Chakraborti, Som Kanjilal, Saumya Ranjan Behera, Dipankar Home, Alex Matzkin, Urbasi Sinha   +6 more
doaj   +1 more source

Conceptual Inadequacy of the Shannon Information in Quantum Measurements [PDF]

, 2001
In a classical measurement the Shannon information is a natural measure of our ignorance about properties of a system. There, observation removes that ignorance in revealing properties of the system which can be considered to preexist prior to and ...
A. Bartana, A. Feinstein, A. Rényi, Anton Zeilinger, C. E. Shannon, C. Tsallis, D. J. Tannor, D. K. Faddeev, D. M. Greenberger, E. Schrödinger, E. T. Jaynes, E. T. Jaynes, I. Ivanovic, I. M. Gelfand, J. Lee, J. Lee, J. S. Bell, M. A. Horne, M. O. Scully, P. Hausladen, R. A. Fisher, R. Horodecki, R. Horodecki, S. Abe, S. Kochen, T. J. Herzog, W. K. Wootters, Č. Brukner, Časlav Brukner   +28 more
core   +2 more sources

Complementary Observables in Quantum Mechanics [PDF]

Foundations of Physics, 2019
We review the notion of complementarity of observables in quantum mechanics, as formulated and studied by Paul Busch and his colleagues over the years. In addition, we provide further clarification on the operational meaning of the concept, and present several characterisations of complementarity - some of which new - in a unified manner, as a ...
Jukka Kiukas, Pekka Lahti, Juha-Pekka Pellonpää, Kari Ylinen   +3 more
openaire   +3 more sources

Direct Observation of Quantum Anomalous Vortex in Fe(Se,Te)

Physical Review X, 2023
Vortices are topological defects of type-II superconductors in an external magnetic field. In a similar fashion to a quantum anomalous Hall insulator, quantum anomalous vortices (QAV) spontaneously nucleate due to orbital-and-spin exchange interaction ...
Y. S. Lin, S. Y. Wang, X. Zhang, Y. Feng, Y. P. Pan, H. Ru, J. J. Zhu, B. K. Xiang, K. Liu, C. L. Zheng, L. Y. Wei, M. X. Wang, Z. K. Liu, L. Chen, K. Jiang, Y. F. Guo, Ziqiang Wang, Y. H. Wang   +17 more
doaj   +1 more source

Integrated quantum polariton interferometry

Communications Physics, 2022
Recently, observation of low-density polaritons in the quantum regime has prompted interest beyond their collective behavior. Here, an integrated quantum logic device that relies on two-body polaritonic interaction is proposed theoretically.
Davide Nigro, Vincenzo D’Ambrosio, Daniele Sanvitto, Dario Gerace   +3 more
doaj   +1 more source

Observation-assisted optimal control of quantum dynamics [PDF]

, 2006
This paper explores the utility of instantaneous and continuous observations in the optimal control of quantum dynamics. Simulations of the processes are performed on several multilevel quantum systems with the goal of population transfer.
Alexander Pechen, Feng Shuang, Goldberg D. E., Herschel Rabitz, Mensky M. B., Neumann V., Rice S. A., Shapiro M., Tak-San Ho   +8 more
core   +2 more sources

Quantum error correction of observables [PDF]

Physical Review A, 2007
22 pages, 1 figure, preprint ...
Beny, Cedric, Kempf, Achim, Kribs, David W.   +2 more
openaire   +2 more sources