Nonlocal implementation of multi-qubit controlled unitary quantum gates with quantum channel
[ X ]
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
World Scientific Publishing
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Quantum computers are very efficient in terms of speed and security. Decoherence and architectural complexity restrict the control of sensitive quantum information as the number of qubits in a quantum computer increases. Therefore, it is more convenient to make a device with multiple quantum processors with small number of qubits instead of making a device with a large number of qubits quantum processors. The implementation of controlled unitary gates is a problem in such nonlocal systems. The methods in the literature for this problem use entangled qubit pairs, classical communication channels and classical bits. The existing methods perform some unitary operations on the target state for reconstruction after sending information through classical communication channels and applying quantum measurements on control states. In this study, a generalized method for nonlocal implementation of multi-qubit controlled unitary quantum gates with quantum channel is proposed. The proposed method can implement any controlled gate on the control and target qubits that are far from each other in terms of location. The method does not require classical channels and classical bits, any extra unitary operation for reconstruction. The proposed method is both more secure and uses less resources for operations than the other hybrid methods in the literature. Comparisons with existing studies are given in terms of required entangled qubit pairs, classical channels and bits, extra unitary operations for reconstruction the target state, and the advantages of the proposed method are revealed.
Açıklama
Anahtar Kelimeler
Nonlocal Gates, Controlled Unitary Gate, Bell State, Gate Teleportation
Kaynak
Modern Physics Letters A (MPPLA)
WoS Q Değeri
Q2
Scopus Q Değeri
Cilt
36
Sayı
34
Künye
Şahin, E., & Yilmaz, I. (2021). Nonlocal implementation of multi-qubit controlled unitary quantum gates with quantum channel. Modern Physics Letters A, 36(34) doi:10.1142/S0217732321502448
