Quantum search via superconducting quantum interference devices in a cavity

Yan, Lu; Dong, Peng; Xue, Zheng‐Yuan; Cao, Zhuo‐Liang

doi:10.1088/1009-1963/16/12/008

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…Grover's algorithm has been realized using many physical systems like NMR [3], superconducting qubits [4,5] and atom cavity QED systems [6][7][8][9][10]. Superconducting qubit cavity QED is an attractive approach for quantum information processing due to their strong coupling limit in microwave cavity as compared to atoms in cavity QED [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Three-qubit Grover’s algorithm using superconducting quantum interference devices in cavity-QED

Waseem

Ahmed

Irfan

et al. 2013

Quantum Inf Process

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We present a scheme for the implementation of three-qubit Grover's algorithm using four-level superconducting quantum interference devices (SQUIDs) coupled to a superconducting resonator. The scheme is based on resonant, off-resonant interaction of the cavity field with SQUIDs and application of classical microwave pulses. We show that adjustment of SQUID level spacings during the gate operations, adiabatic passage, and second-order detuning are not required that leads to faster implementation. We also show that the marked state can be searched with high fidelity even in the presence of unwanted off-resonant interactions, level decay, and cavity dissipation.

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Section: Introductionmentioning

confidence: 99%

Three-qubit Grover’s algorithm using superconducting quantum interference devices in cavity-QED

Waseem

Ahmed

Irfan

et al. 2013

Quantum Inf Process

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Implementation of quantum search scheme by adiabatic passage in a cavity–laser–atom system

Liu¹,

Li²,

Yang³

2009

Chinese Phys. B

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This paper proposes a scheme for implementing the adiabatic quantum search algorithm of different marked items in an unsorted list of N items with atoms in a cavity driven by lasers. N identical three-level atoms are trapped in a single-mode cavity. Each atom is driven by a set of three pulsed laser fields. In each atom, the same level represents a database entry. Two of the atoms are marked differently. The marked atom has an energy gap between its two ground states. The two different marked states can be sought out respectively starting from an initial entangled state by controlling the ratio of three pulse amplitudes. Moreover, the mechanism, based on adiabatic passage, constitutes a decoherence-free method in the sense that spontaneous emission and cavity damping are avoided since the dynamics follows the dark state. Furthermore, this paper extends the algorithm with m (m > 2) atoms marked in an ideal situation. Any different marked state can be sought out.

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Quantum search via superconducting quantum interference devices in a cavity

Cited by 2 publications

References 25 publications

Three-qubit Grover’s algorithm using superconducting quantum interference devices in cavity-QED

Three-qubit Grover’s algorithm using superconducting quantum interference devices in cavity-QED

Implementation of quantum search scheme by adiabatic passage in a cavity–laser–atom system

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