Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Morzhin, Oleg"'
Autor:
Morzhin, Oleg, Pechen, Alexander
In this work, we adopt the Gradient Projection Method (GPM) to problems of quantum control. For general $N$-level closed and open quantum systems, we derive the corresponding adjoint systems and gradients of the objective functionals, and provide the
Externí odkaz:
http://arxiv.org/abs/2411.19644
Publikováno v:
Eur. Phys. J. Plus 139, 411 (2024)
High fidelity generation of two-qubit gates is important for quantum computation, since such gates are components of popular universal sets of gates. Here we consider the problem of high fidelity generation of two-qubit C-NOT and C-PHASE (with a deta
Externí odkaz:
http://arxiv.org/abs/2405.14069
Control of the von Neumann Entropy for an Open Two-Qubit System Using Coherent and Incoherent Drives
Autor:
Morzhin, Oleg, Pechen, Alexander
Publikováno v:
Entropy. 2024. Vol. 26, Iss. 1. Art. No. 36
This article is devoted to developing an approach for manipulating the von Neumann entropy $S(\rho(t))$ of an open two-qubit system with coherent control and incoherent control inducing time-dependent decoherence rates. The following goals are consid
Externí odkaz:
http://arxiv.org/abs/2405.06365
Autor:
Morzhin, Oleg, Pechen, Alexander
Publikováno v:
Lobachevskii J. Math., 45:2, 728-740 (2024)
In this work, we consider a general form of the dynamics of open quantum systems determined by the Gorini-Kossakowsky-Sudarchhan-Lindblad type master equation with simultaneous coherent and incoherent controls with three particular forms of the two-q
Externí odkaz:
http://arxiv.org/abs/2312.05625
Autor:
Morzhin, Oleg, Pechen, Alexander
Publikováno v:
The Bulletin of Irkutsk State University. Series Mathematics, 2023, vol. 45, pp. 3-23
This work considers two-qubit open quantum systems driven by coherent and incoherent controls. Incoherent control induces time-dependent decoherence rates via time-dependent spectral density of the environment which is used as a resource for controll
Externí odkaz:
http://arxiv.org/abs/2308.06119
Autor:
Morzhin, Oleg, Pechen, Alexander
Publikováno v:
Proc. Steklov Inst. Math., 324, 153-168 (2024)
The work considers an open qutrit system whose density matrix $\rho(t)$ evolution is governed by the Gorini-Kossakowski-Sudarshan-Lindblad master equation with simultaneous coherent (in the Hamiltonian) and incoherent (in the superoperator of dissipa
Externí odkaz:
http://arxiv.org/abs/2308.03976
Autor:
Morzhin, Oleg, Pechen, Alexander
Optimal control of two-qubit quantum systems attracts high interest due to applications ranging from two-qubit gate generation to optimization of receiver for transferring coherence matrices along spin chains. State preparation and manipulation is am
Externí odkaz:
http://arxiv.org/abs/2304.00863
Autor:
Morzhin, Oleg V., Pechen, Alexander N.
This article considers some control problems for closed and open two-level quantum systems. The closed system's dynamics is governed by the Schr\"odinger equation with coherent control. The open system's dynamics is governed by the Gorini-Kossakowski
Externí odkaz:
http://arxiv.org/abs/2205.02521
Autor:
Morzhin, Oleg V., Pechen, Alexander N.
Publikováno v:
AIP Conference Proceedings, 2362, 060003 (2021)
The article considers a two-level open quantum system, whose evolution is governed by the Gorini--Kossakowski--Lindblad--Sudarshan master equation with Hamiltonian and dissipation superoperator depending, correspondingly, on piecewise constant cohere
Externí odkaz:
http://arxiv.org/abs/2106.10146
Publikováno v:
Journal of Physics A: Mathematical and Theoretical, 54:21 (2021), 215303
In this work, we consider the problem of ultrafast controlled generation of single-qubit phase shift quantum gates. Globally optimal control is a control which realizes the gate with maximal possible fidelity. Trap is a control which is optimal only
Externí odkaz:
http://arxiv.org/abs/2104.12699