Multiqubit tunable phase gate of one qubit simultaneously controllingnqubits in a cavity

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Multiqubit tunable phase gate of one qubit simultaneously controlling n qubits in a cavity

Chui-Ping Yang,1,2,3,5 Shi-Biao Zheng,1,4 and Franco Nori1,2 1Advanced Science Institute, RIKEN, Wako-Shi, Saitama 351-0198, Japan 2Physics Department, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA 3Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China 4Department of Physics and State Key Laboratory Breeding Base of Photocatalysis, Fuzhou Universi...

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Phase gate of one qubit simultaneously controlling n qubits in a cavity

Chui-Ping Yang,1,2 Yu-xi Liu,1,3,4 and Franco Nori1,2 1Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-Shi, Saitama 351-0198, Japan 2Physics Department, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA 3Institute of Microelectronics, Tsinghua University, Beijing 100084, China 4Tsinghua National Laboratory for Information Science and Techn...

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qu an t - ph ] 4 F eb 2 01 4 One - step implementation of multiqubit phase gate with one control qubit and multiple target qubits in coupled cavities

We propose a one-step scheme to implement a multiqubit controlled phase gate of one qubit simultaneously controlling multiple qubits with three-level atoms at distant nodes in coupled cavity arrays. The selective qubit-qubit couplings are achieved by adiabatically eliminating the atomic excited states and photonic states and the required phase shifts between the control qubit and any target qub...

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First-order superradiant phase transitions in a multiqubit cavity system.

We predict the existence of novel first-order phase transitions in a general class of multiqubit cavity systems. Apart from atomic systems, the associated superradiant phase transition should be observable in a variety of solid-state experimental systems, including the technologically important case of interacting quantum dots coupled to an optical cavity mode.

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Three-qubit quantum-gate operation in a cavity QED system

A scheme is proposed to obtain three-qubit gates, such as quantum-phase gate and C2-NOT gate operations, in a cavity QED system where highly detuned cavity-field modes interact with a four-level system in an inverted-Y configuration. The influence of the Stark shift is also included in such proposed gate operations. Since only the metastable lower levels are involved in the gate operations, the...

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ژورنال

عنوان ژورنال: Physical Review A

سال: 2010

ISSN: 1050-2947,1094-1622

DOI: 10.1103/physreva.82.062326