2002
DOI: 10.1103/physreva.66.062316
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Experimental implementation of the Deutsch-Jozsa algorithm for three-qubit functions using pure coherent molecular superpositions

Abstract: The Deutsch-Jozsa algorithm is experimentally demonstrated for three-qubit functions using pure coherent superpositions of Li2 rovibrational eigenstates. The function's character, either constant or balanced, is evaluated by first imprinting the function, using a phase-shaped femtosecond pulse, on a coherent superposition of the molecular states, and then projecting the superposition onto an ionic final state, using a second femtosecond pulse at a specific time delay.----

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Cited by 82 publications
(73 citation statements)
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“…23 It seems quite feasible to create in the experiment a system of few vibrational qubits, fully entangled and well separated from the environment. 4 Such prototype systems by themselves also could be used in the fundamental studies of quantum control, noise effects, decoherence, etc. For these small-scale (or test-bed) applications, the quantum beat approach to the readout, discussed in this paper, is also quite appropriate.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…23 It seems quite feasible to create in the experiment a system of few vibrational qubits, fully entangled and well separated from the environment. 4 Such prototype systems by themselves also could be used in the fundamental studies of quantum control, noise effects, decoherence, etc. For these small-scale (or test-bed) applications, the quantum beat approach to the readout, discussed in this paper, is also quite appropriate.…”
Section: Introductionmentioning
confidence: 99%
“…In one type of implementation, a set of 2 n vibrational eigenstates in a molecule can represent n qubits that are inherently entangled, 4 encoding several qubits on a single molecule, as shown in Fig. 1.…”
Section: Introductionmentioning
confidence: 99%
“…We show how a TFRCARS interference experiment can use the molecular vibrational level structure to solve the Deutsch-Jozsa (DJ) problem [5]. The DJ problem has become a benchmark for demonstrations of algorithms on prototypes of quantum computers; having so far been used in NMR [6][7][8][9][10][11], linear optics [12], ro-vibrational molecular wavepackets in a pump-probe experiment [13], and excitons in semiconductor quantum dots [14].…”
Section: Introductionmentioning
confidence: 99%
“…It is the case that one could, although not so easily for a molecule with a high vibrational frequency as HCl, prepare a coherent superposition of the ϭ 0 and ϭ 1 states of a molecule. One certainly can prepare a coherent superposition of different rotational states and such rovibrational coherent superpositions have been proposed for molecule-based quantum computing (12,13). But on a longer time scale molecular states decohere quite rapidly.…”
mentioning
confidence: 99%