Adiabatic phase-conserving processes for executing quantum operations with ultracold atoms

We have studied the regimes of deterministic single-atom Rydberg excitation in the conditions of Rydberg blockade and the methods of compensation for the dynamic phase of the wave function during the adiabatic passage. Using these methods, we have proposed schemes of single-qubit and two-qubit quant...

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Published inQuantum electronics (Woodbury, N.Y.) Vol. 47; no. 5; pp. 455 - 462
Main Authors Beterov, I.I., Tret'yakov, D.B., Entin, V.M., Yakshina, E.A., Khamzina, G.N., Ryabtsev, I.I.
Format Journal Article
LanguageEnglish
Published Bristol Kvantovaya Elektronika, Turpion Ltd and IOP Publishing 01.06.2017
IOP Publishing
Subjects
Adiabatic flow
adiabatic passage
ADIABATIC PROCESSES
Atomic properties
ATOMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
EXCITATION
Interatomic distance
INTERATOMIC DISTANCES
PHASE SHIFT
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
quantum computing
QUANTUM STATES
QUBITS
Qubits (quantum computing)
Random numbers
RANDOMNESS
RESONANCE
Rydberg atoms
SENSITIVITY
Ultracold atoms
Variation
WAVE FUNCTIONS
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Summary:We have studied the regimes of deterministic single-atom Rydberg excitation in the conditions of Rydberg blockade and the methods of compensation for the dynamic phase of the wave function during the adiabatic passage. Using these methods, we have proposed schemes of single-qubit and two-qubit quantum states with mesoscopic atomic ensembles containing a random number of atoms, considred as quibits. The double adiabatic passage of the Förster resonance for two interacting atoms with a deterministic phase shift can be used for the implementation of two-qubit gates with reduced sensitivity of the gate fidelity to the fluctuations of the interatomic distance.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL16356