Deterministic generation of Greenberger-Horne-Zeilinger entangled states of cat-state qubits in circuit QED

Abstract

We present an efficient method to generate a Greenberger-Horne-Zeilinger (GHZ) entangled state of three cat-state qubits (cqubits) via circuit QED. The GHZ state is prepared with three microwave cavities coupled to a superconducting transmon qutrit. Because the qutrit remains in the ground state during the operation, decoherence caused by the energy relaxation and dephasing of the qutrit is greatly suppressed. The GHZ state is created deterministically because no measurement is involved. Numerical simulations show that high-fidelity generation of a three-cqubit GHZ state is feasible with present circuit QED technology. This proposal can be easily extended to create a $N$-cqubit GHZ state ($N\ge 3$), with $N$ microwave or optical cavities coupled to a natural or artificial three-level atom.

arXiv comment11 pages, 4 figures

References in corpus (17)

• Charge insensitive qubit design derived from the Cooper pair box
• Quantum secret sharing
• Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
• Atomic physics and quantum optics using superconducting circuits
• Microwave photonics with superconducting quantum circuits
• A Multiparticle Generalization of Entanglement Swapping
• Dynamically protected cat-qubits: a new paradigm for universal quantum computation
• Effective Hamiltonian Theory and Its Applications in Quantum Information
• Implementation of a Toffoli Gate with Superconducting Circuits
• A quantum memory with near-millisecond coherence in circuit QED
• A Schrodinger Cat Living in Two Boxes
• Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
• Coherence and Decay of Higher Energy Levels of a Superconducting Transmon Qubit
• Deterministic Hadamard gate for microwave "cat-state" qubits in cQED
• Entangling two oscillators with arbitrary asymmetric initial states
• Efficient scheme for generation of photonic NOON states in circuit QED
• Generating double NOON states of photons in circuit QED

Cited by in corpus (9)

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• Single-step implementation of a hybrid controlled-NOT gate with one superconducting qubit simultaneously controlling multiple target cat-state qubits
• Construction of a qudit using Schrodinger cat states and generation of hybrid entanglement between a discrete-variable qudit and a continuous-variable qudit
• Preparation of high fidelity entangled cat states with composite pulses
• Fast quantum state transfer and entanglement preparation in strongly coupled bosonic systems
• Nearly maximal violation of the Mermin-Klyshko inequality with multimode entangled coherent states
• Single-step multipartite entangled states generation from coupled circuit cavities
• Transferring quantum entangled states between multiple single-photon-state qubits and coherent-state qubits in circuit QED
• Transferring entangled states of photonic cat-state qubits in circuit QED