Zobrazeno 1 - 10
of 336
pro vyhledávání: '"Ježek, M."'
Autor:
Mika, J., Podhora, L., Lachman, L., Obšil, P., Hloušek, J., Ježek, M., Filip, R., Slodička, L.
Publikováno v:
J Mika et al New J. Phys. 20 (2018) 093002
We present the experimental generation of light with directly observable close-to ideal thermal statistical properties. The thermal light state is prepared using a spontaneous Raman emission in a warm atomic vapor. The photon number statistics is eva
Externí odkaz:
http://arxiv.org/abs/1801.10555
Publikováno v:
Scientific Reports 7, Article number: 13046 (2017)
Quantum oscillators prepared out of thermal equilibrium can be used to produce work and transmit information. By intensive cooling of a single oscillator, its thermal energy deterministically dissipates to a colder environment, and the oscillator sub
Externí odkaz:
http://arxiv.org/abs/1801.06371
Publikováno v:
Optics Express Vol. 25, Issue 25, pp. 31230-31238 (2017)
Generation of nonclassical light is an essential tool for quantum optics research and applications in quantum information technology. We present realization of the source of nonclassically correlated photon pairs based on the process of spontaneous f
Externí odkaz:
http://arxiv.org/abs/1712.00506
Publikováno v:
Phys. Rev. A 93, 042321 (2016)
We theoretically investigate and experimentally demonstrate a procedure for conditional control and enhancement of an interferometric coupling between two qubits encoded into states of bosonic particles. Our procedure combines local coupling of one o
Externí odkaz:
http://arxiv.org/abs/1701.05220
Publikováno v:
Phys. Rev. A 93, 052318 (2016)
We experimentally demonstrate the underlying physical mechanism of the recently proposed protocol for superreplication of quantum phase gates [W. D\"ur, P. Sekatski, and M. Skotiniotis, Phys. Rev. Lett. 114, 120503 (2015)], which allows to produce up
Externí odkaz:
http://arxiv.org/abs/1701.04062
Publikováno v:
Sci. Rep. 7, 45045 (2017)
Localizability of entanglement in fully inseparable states is a key ingredient of assisted quantum information protocols as well as measurement-based models of quantum computing. We investigate the existence of fully inseparable states with nonlocali
Externí odkaz:
http://arxiv.org/abs/1611.02444
Autor:
Micuda, M., Starek, R., Straka, I., Mikova, M., Dusek, M., Jezek, M., Filip, R., Fiurasek, J.
Publikováno v:
Phys. Rev. A 92, 022341 (2015)
We propose and experimentally demonstrate a scheme for implementation of a maximally entangling quantum controlled-Z gate between two weakly interacting systems. We conditionally enhance the interqubit coupling by quantum interference. Both before an
Externí odkaz:
http://arxiv.org/abs/1509.05682
Autor:
Mikova, M., Sedlak, M., Straka, I., Micuda, M., Ziman, M., Jezek, M., Dusek, M., Fiurasek, J.
Publikováno v:
Phys. Rev. A 90, 022317 (2014)
We investigate optimal discrimination between two projective single-qubit measurements in a scenario where the measurement can be performed only once. We consider general setting involving a tunable fraction of inconclusive outcomes and we prove that
Externí odkaz:
http://arxiv.org/abs/1408.0940
Publikováno v:
Phys. Rev. A 89, 042316 (2014)
A quantum analog of the fundamental classical NOT gate is a quantum gate that would transform any input qubit state onto an orthogonal state. Intriguingly, this universal NOT gate is forbidden by the laws of quantum physics. This striking phenomenon
Externí odkaz:
http://arxiv.org/abs/1404.4308
Publikováno v:
Phys. Rev. A 89, 042304 (2014)
We present a systematic comparison of different methods of fidelity estimation of a linear optical quantum controlled-Z gate implemented by two-photon interference on a partially polarizing beam splitter. We have utilized a linear fidelity estimator
Externí odkaz:
http://arxiv.org/abs/1403.4863