Creation of coherent superposition of states in<i>N</i>-pod systems by a train of coincident pulses

Saadati-Niari, M.; Amniat-Talab, M.

doi:10.1080/09500340.2014.942404

Cited by 11 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coherences in NLAP are characterized by N (N − 1)/2 phase parameters φ ij , with i, j = 1, 2, ..., N . Coherent superposition states in N + 1 level atom system can be generated by stimulated Raman adiabatic passage [25,26], Morris-Shore transformation [27], or quantum Householder reflection techniques [28,29]. Thermalization of the single atom can be considered relatively fast and hence the injection rate would be limited by the time of coherence preparation.…”

Section: Nlap Model and System Dynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Quantum fuel with multilevel atomic coherence for ultrahigh specific work in a photonic Carnot engine

Türkpençe

Müstecaplıoğlu

2016

Phys. Rev. E

View full text Add to dashboard Cite

We investigate scaling of work and efficiency of a photonic Carnot engine with the number of quantum coherent resources. Specifically, we consider a generalization of the "phaseonium fuel" for the photonic Carnot engine, which was first introduced as a three-level atom with two lower states in a quantum coherent superposition by [M. O. Scully, M. Suhail Zubairy, G. S. Agarwal, and H. Walther, Science 299, 862 (2003)], to the case of N + 1 level atoms with N coherent lower levels. We take into account atomic relaxation and dephasing as well as the cavity loss and derive a coarse grained master equation to evaluate the work and efficiency, analytically. Analytical results are verified by microscopic numerical examination of the thermalization dynamics. We find that efficiency and work scale quadratically with the number of quantum coherent levels. Quantum coherence boost to the specific energy (work output per unit mass of the resource) is a profound fundamental difference of quantum fuel from classical resources. We consider typical modern resonator set ups and conclude that multilevel phaseonium fuel can be utilized to overcome the decoherence in available systems. Preparation of the atomic coherences and the associated cost of coherence are analyzed and the engine operation within the bounds of the second law is verified. Our results bring the photonic Carnot engines much closer to the capabilities of current resonator technologies.

show abstract

Section: Nlap Model and System Dynamicsmentioning

confidence: 99%

“…(15) reduces to M = I − 2|ν ν| which is the standard QHR. The interaction represented by each Householder matrix can be described by a propagator which can be determined by the Morris-Shore transformation [27].…”

Section: Preparation Of the Nlap And Its Energy Costmentioning

confidence: 99%

Quantum fuel with multilevel atomic coherence for ultrahigh specific work in a photonic Carnot engine

Türkpençe

Müstecaplıoğlu

2016

Phys. Rev. E

View full text Add to dashboard Cite

show abstract

“…Following the MS transformation technique, one can find a constant unitary operator transforming the system into a coupled three-state system and N − 2 decoupled states as it was shown in [12]. In this method, the Rabi frequencies are assumed to have the same time dependence, but possibly with different magnitudes and hence difference pulse areas.…”

Section: Reducing Of N-pod System To a Three-state λ-Like Systemmentioning

confidence: 99%

“…N-pod systems composed of N degenerate ground states and one upper excited state is an interesting quantum system which is very relevant for the implementation of fast qudit gates [5][6][7]. Coherent superposition of states in N-pod systems [8][9][10][11][12][13] has been very recently investigated for quantum fuel [14] and nuclear state engineering [15]. Král et al [16] have proposed an adiabatic population transfer scheme to the transfer of population between arbitrary superposition of initial and final states in non-degenerate N-pod systems.…”

Section: Introductionmentioning

confidence: 99%

“…For example , the rising edge of rf field produced by suddenly turned on rf generator has a shape very close to the tanh profile. In [12] creation of coherent superposition of all ground states by Gaussian pulses with ∆ = 0 has been presented, but in this paper we will consider hyperbolic-tangent coincident pulses with nonzero detuning. In this paper we present the extension of the proposed method of [21] to the case when the ground state of the two level system is replaced by N degenerate states.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coherent superposition of states in N-pod systems by hyperbolic-tangent coincident pulses

2018

View full text Add to dashboard Cite

We present an analytically exactly solvable N-pod quantum model, in which the coupling has a hyperbolic-tangent temporal shape and the frequency detuning is constant. The solution is derived by using the Morris–Shore transformation to reduce the N-pod system to a -like one and then to a two state system and a set of decoupled states in two steps. In this work, we use the propagator for a reduced two state system and the inverse transformation to achieve the reduced three state propagator. It is shown that any preselected coherent superposition of all N ground states can be obtained from an initial superposition of M ground states in the presence of detuning. We use a train of tanh coincident pulses and we show that the effect of spontaneous emission is efficiently suppressed by increasing the number of pulses. Besides, we explore that a coherent superposition of ground states from the initial excited state can be implemented using tanh pulses.

show abstract

Coherent superpositions of states in coupled Hilbert-space using step by step Morris–Shore transformation

Saadati-Niari

2016

Annals of Physics

View full text Add to dashboard Cite

Creation of coherent superposition of states inN-pod systems by a train of coincident pulses

Cited by 11 publications

References 24 publications

Quantum fuel with multilevel atomic coherence for ultrahigh specific work in a photonic Carnot engine

Quantum fuel with multilevel atomic coherence for ultrahigh specific work in a photonic Carnot engine

Coherent superposition of states in N-pod systems by hyperbolic-tangent coincident pulses

Coherent superpositions of states in coupled Hilbert-space using step by step Morris–Shore transformation

Contact Info

Product

Resources

About