Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Ivanov, Svetoslav S."'
We theoretically propose a type of tunable polarization retarder, which is composed of sequences of half-wave and quarter-wave polarization retarders, allowing operation at broad spectral bandwidth. The constituent retarders are composed of stacked s
Externí odkaz:
http://arxiv.org/abs/2404.17853
We introduce a quantum control technique using polychromatic pulse sequences (PPS), consisting of pulses with different carrier frequencies, i.e. different detunings with respect to the qubit transition frequency. We derive numerous PPS, which genera
Externí odkaz:
http://arxiv.org/abs/2204.02147
Publikováno v:
Phys. Rev. A 102, 013105 (2020)
We develop a systematic approach to derive narrowband (NB) and passband (PB) composite sequences which can produce any pre-selected transition probability with any desired accuracy. The NB composite pulses are derived by successive cancellation of de
Externí odkaz:
http://arxiv.org/abs/2004.08456
We propose a simplified mathematical construction of the quantum Fourier transform which is suited for systems described by Ising-type Hamiltonians. By contrast to the standard Cooley-Tuckey scheme, which prescribes sequences of CPHASE gates, our imp
Externí odkaz:
http://arxiv.org/abs/1503.08806
We design composite controlled-phase gates, which compensate errors in the phase of a single gate. The errors can be of various nature, such as relative, absolute or both. We present composite sequences which are robust to relative errors up to the 6
Externí odkaz:
http://arxiv.org/abs/1503.08788
Publikováno v:
Journal of the Optical Society of America A, Vol. 31, Issue 5, pp. 952-956 (2014)
By using the formal analogy between the evolution of the state vector in quantum mechanics and the Jones vector in polarization optics, we construct and demonstrate experimentally efficient broadband half-wave polarization retarders and tunable narro
Externí odkaz:
http://arxiv.org/abs/1503.02699
Publikováno v:
Phys. Rev. A 91, 032311 (2015)
We present improved circuits for the control-control-phase (Toffoli) gate and the control-swap (Fredkin) gate using three and four global two-qubit gates, respectively. This is a nearly double speed-up compared to the conventional circuits, which req
Externí odkaz:
http://arxiv.org/abs/1503.02514
Autor:
Peters, Thorsten, Ivanov, Svetoslav S., Englisch, Daniel, Rangelov, Andon A., Vitanov, Nikolay V., Halfmann, Thomas
Publikováno v:
Applied Optics 2012 Nov 1; 51(31):7466-74
We propose and experimentally demonstrate novel types of composite sequences of half-wave and quarter-wave polarization retarders, either permitting operation at ultra-broad spectral bandwidth or narrow bandwidth. The retarders are composed of stacke
Externí odkaz:
http://arxiv.org/abs/1211.4358
We propose a fast and efficient technique to create classes of highly entangled states of trapped ions, such as arbitrary Dicke states and superpositions of them, e.g. NOON states. The ions are initialized in the phonon ground state and are addressed
Externí odkaz:
http://arxiv.org/abs/1209.4488
We study theoretically the collective E$\otimes$e Jahn-Teller-Dicke distortion in a system of trapped ions. We focus in the limit of infinite range interactions in which an ensemble of effective spins interacts with two collective vibrational modes w
Externí odkaz:
http://arxiv.org/abs/1207.0452