Teleportation with superconducting qubits
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THE EUROPEAN PHYSICAL JOURNAL D
Regular Article
Teleportation with superconducting qubits Soheila Salimian, Mohammad Kazem Tavassolya , and Nayere Sehati Atomic and Molecular Group, Faculty of Physics, Yazd University, Yazd, Iran Received 23 January 2020 / Received in final form 26 April 2020 Published online 7 July 2020 c EDP Sciences / Societ`
a Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2020 Abstract. In this paper we propose a new protocol for quantum teleportation between two LC resonators in Alice’s and Bob’s lab via superconducting qubits. The coupling of superconducting qubits with each other and with LC resonators are tunable by applying the external magnetic fields. We use this model to generate entanglement between superconducting qubits and teleport the unknown state of LC resonator in Alice’s to Bob’s lab. To implement teleportation, the result of Alice’s Bell state measurement is classically informed to Bob. Finally, the unknown state of LC resonator in Alice’s lab is teleported to the state of LC resonator in Bob’s lab by applying a phase gate and a proper unitary rotating operator on the state of LC resonator in Bob’s lab. It is observed that the target state is teleported to the LC resonator in Bob’s lab with maximum possible fidelity.
1 Introduction Transferring the quantum states is an important primitive tool in some branches of quantum mechanics such as quantum information and quantum computation [1–3]. Quantum teleportation is transferring an unknown quantum state from a sender (Alice’s lab) to a receiver (Bob’s lab) without transferring the physical carrier of information with classical and quantum channels. Quantum teleportation which at first has been proposed by Bennett et al. [4] can be achieved by several methods such as cavity quantum electrodynamics (QED) method [5,6] and by using beam splitter [7,8]. Teleportation of quantum continuous variables [9], atomic states [10,11] and photon states [12] have been already investigated. Also, the schemes for teleportation are presented for superpositions of macroscopic states of a cavity field [13], Schr¨odinger cat states of light [14,15] and squeezed states [8,16]. Moreover, some teleportation protocols do not use the Bell-state measurement [17,18]. In [19], the effects of unbalanced random telegraph noise on teleportation is discussed. More recently quantum teleportation based on superconducting circuits has been demonstrated [20]. The authors in [21] have proposed a deterministic scheme for hybrid teleportation through continuous-variable entangled states in superconducting circuits. The superconducting circuits are powerful devices for quantum information protocols and can be combined with other artificially structured devices [22–24]. The low transmission of LC resonators is the benefit of implementing a
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superconducting circuits in quantum teleportation which enables one to extend the range of application of quantum teleportation protocols to significantly large distance
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