Zobrazeno 1 - 10
of 109
pro vyhledávání: '"S. J. van Enk"'
Autor:
Abhijeet Melkani, S. J. van Enk
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p 033060 (2021)
We consider the quantum theory of paraxial nonrelativistic electron beams in nonuniform magnetic fields, such as the Glaser field. We find the wave function of an electron from such a beam and show that it is a joint eigenstate of two (z-dependent) c
Externí odkaz:
https://doaj.org/article/2ba35cfd81cf4f57812c0631bcc7b057
Autor:
Saumya Biswas, S. J. van Enk
We apply input-output theory with quantum pulses [AH Kiilerich, K M\o lmer, Phys. Rev. Lett. {\bf 123}, 123604 (2019)] to a model of a new type of two-photon detector consisting of one molecule that can detect two photons arriving sequentially in tim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86abc9353a4235042631a42a64798865
Autor:
Abhijeet Melkani, S. J. van Enk
We consider the quantum theory of paraxial non-relativistic electron beams in non-uniform magnetic fields, such as the Glaser field. We find the wave function of an electron from such a beam and show that it is a joint eigenstate of two ($z$-dependen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51e6d426a9f25f95de87031a7156166c
http://arxiv.org/abs/2011.11729
http://arxiv.org/abs/2011.11729
Autor:
Saumya Biswas, S. J. van Enk
Publikováno v:
Physical Review A. 102
We construct a class of Hamiltonians that describe the photodetection process from beginning to end. Our Hamiltonians describe the creation of a photon, how the photon travels to an absorber (such as a molecule), how the molecule absorbs the photon,
Autor:
I. D. Moore, S. J. van Enk
Publikováno v:
International Journal of Quantum Information. 19
A recurring problem in quantum mechanics is to estimate either the state of a quantum system or the measurement operator applied to it. If we wish to estimate both, then the difficulty is that the state and the measurement always appear together: to
Autor:
S. J. van Enk, Tzula B. Propp
Single photon detection generally consists of several stages: the photon has to interact with one or more charged particles, its excitation energy will be converted into other forms of energy, and amplification to a macroscopic signal must occur, thu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d8c0e2daadbcee7d990de89739b8cd6
http://arxiv.org/abs/1901.09974
http://arxiv.org/abs/1901.09974
Autor:
S J van Enk, Robin Blume-Kohout
Publikováno v:
New Journal of Physics, Vol 15, Iss 2, p 025024 (2013)
The principle behind quantum tomography is that a large set of observations—many samples from a ‘quorum’ of distinct observables—can all be explained satisfactorily as measurements on a single underlying quantum state or process. Unfortunatel
Externí odkaz:
https://doaj.org/article/5b578081e4a94e87b7a1a00ae0de0f3e
We experimentally demonstrate that loop state-preparation-and-measurement (SPAM) tomography is capable of detecting correlated errors in a two-qubit system. We prepare photon pairs in a state that approximates a Werner state, which may or may not be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2526504ea37592579364ac728da8c142
Autor:
S. J. van Enk
Publikováno v:
Physical Review A. 96
Suppose we measure the time-dependent spectrum of a single photon. That is, we first send the photon through a set of frequency filters (which we assume to have different filter frequencies but the same finite bandwidth $\mathrm{\ensuremath{\Gamma}}$
In many experiments on microscopic quantum systems, it is implicitly assumed that when a macroscopic procedure or “instruction” is repeated many times – perhaps in different contexts – each application results in the same microscopic quantum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84675960a280f229100cc0c79914b713
http://arxiv.org/abs/1708.08173
http://arxiv.org/abs/1708.08173