Zobrazeno 1 - 10
of 35
pro vyhledávání: '"C. D'Helon"'
Publikováno v:
Mathematical and Computer Modelling. 45(3-4):459-472
We investigate the role of additional information in reducing the computational complexity of the global optimization problem (GOP). Following this approach, we develop GMG - an algorithm for finding the Global Minimum with a Guarantee. The new algor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ff262e8732b445f4e65ee78e81268c5
Autor:
Gerard J. Milburn, C. D'Helon
Publikováno v:
Physical Review A. 56:640-644
We propose two quantum error correction schemes which increase the maximum storage time for qubits in a system of cold trapped ions, using a minimal number of ancillary qubits. Both schemes consider only the errors introduced by the decoherence due t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::369a4b89d49347597f04d5a63ac498fd
https://doi.org/10.1103/physreva.56.640
https://doi.org/10.1103/physreva.56.640
Autor:
C. D'Helon, Gerard J. Milburn
Publikováno v:
Physical Review A. 54:5141-5146
We show that a series of quantum computations involving an isolated N-quantum-bit ion register can be used to make an approximate quantum nondemolition measurement of the number state distribution of a collective vibrational mode. A unitary transform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::433935cb2f220dca383dab776dcc3710
https://doi.org/10.1103/physreva.54.5141
https://doi.org/10.1103/physreva.54.5141
Autor:
C. D'Helon, Gerard J. Milburn
Publikováno v:
Physical Review A. 54:R25-R28
Summary form only given. In this paper we propose a similar measurement scheme to that of Cirac et al. (1995), which employs quantum state tomography to determine the initial state of a vibrational mode of a single trapped ion in a harmonic potential
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9c7271da8ac303b29c500dca14fbe46
https://doi.org/10.1103/physreva.54.r25
https://doi.org/10.1103/physreva.54.r25
Publikováno v:
Journal of Modern Optics. 41:595-601
A single-beam gradient optical trap was constructed using a 20 mW 632·8 nm He–Ne laser coupled to an optical microscope. Latex spheres were trapped in water at the focal point of a tightly-focused laser beam, which was generated using a 100 × obj
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f05885e2342d6f51aa6de7edb9d90e9
https://doi.org/10.1080/09500349414550581
https://doi.org/10.1080/09500349414550581
Publikováno v:
CDC
The purpose of this paper is to describe some recent results concerning optimal feedback control of quantum systems using risk-sensitive performance criteria. We employ quantum stochastic models to describe an important class of quantum systems and d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::805ad420299778e4b01baa459f15b62f
https://doi.org/10.1109/cdc.2006.377440
https://doi.org/10.1109/cdc.2006.377440
Autor:
Matthew R. James, C. D'Helon
This paper concerns the problem of stability for quantum feedback networks. We demonstrate in the context of quantum optics how stability of quantum feedback networks can be guaranteed using only simple gain inequalities for network components and al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::870e611a1afc2d080d908f205448c098
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. The control is illustrated by a realistic simulation for both adiabatic and ther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67878e48a1e81932228ba17accd70eab
A constant-time solution of the continuous Global Optimization Problem (GOP) is obtained by using an ensemble algorithm. We show that under certain assumptions, the solution can be guaranteed by mapping the GOP onto a discrete unsorted search problem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b802f7ab8d830cd8e8588f0236a16f0e
We present an open loop (bang-bang) scheme to control decoherence in a generic one-qubit quantum gate and implement it in a realistic simulation. The system is consistently described within the spin-boson model, with interactions accounting for both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef8fdbb76db1d45cce1081258300f3cd
http://arxiv.org/abs/quant-ph/0202141
http://arxiv.org/abs/quant-ph/0202141