TY - JOUR
T1 - Qubit lattice coherence induced by electromagnetic pulses in superconducting metamaterials
AU - Ivić, Z.
AU - Lazarides, N.
AU - Tsironis, G. P.
N1 - Funding Information:
This work was partially supported by the European Union Seventh Framework Programme (FP7- REGPOT-2012-2013-1) under grant agreement no 316165, the Serbian Ministry of Education and Science under Grants No. III-45010, No. OI-171009, the Ministry of Education and Science of the Republic of Kazakhstan (Contract No. 339/76-2015), and the Ministry of Education and Science of the Russian Federation in the framework of the Increase Competitiveness Program of NUST MISiS(No. K2-2015-007).
PY - 2016/7/12
Y1 - 2016/7/12
N2 - Quantum bits (qubits) are at the heart of quantum information processing schemes. Currently, solid-state qubits, and in particular the superconducting ones, seem to satisfy the requirements for being the building blocks of viable quantum computers, since they exhibit relatively long coherence times, extremely low dissipation, and scalability. The possibility of achieving quantum coherence in macroscopic circuits comprising Josephson junctions, envisioned by Legett in the 1980's, was demonstrated for the first time in a charge qubit; since then, the exploitation of macroscopic quantum effects in low-capacitance Josephson junction circuits allowed for the realization of several kinds of superconducting qubits. Furthermore, coupling between qubits has been successfully achieved that was followed by the construction of multiple-qubit logic gates and the implementation of several algorithms. Here it is demonstrated that induced qubit lattice coherence as well as two remarkable quantum coherent optical phenomena, i.e., self-induced transparency and Dicke-type superradiance, may occur during light-pulse propagation in quantum metamaterials comprising superconducting charge qubits. The generated qubit lattice pulse forms a compound "quantum breather" that propagates in synchrony with the electromagnetic pulse. The experimental confirmation of such effects in superconducting quantum metamaterials may open a new pathway to potentially powerful quantum computing.
AB - Quantum bits (qubits) are at the heart of quantum information processing schemes. Currently, solid-state qubits, and in particular the superconducting ones, seem to satisfy the requirements for being the building blocks of viable quantum computers, since they exhibit relatively long coherence times, extremely low dissipation, and scalability. The possibility of achieving quantum coherence in macroscopic circuits comprising Josephson junctions, envisioned by Legett in the 1980's, was demonstrated for the first time in a charge qubit; since then, the exploitation of macroscopic quantum effects in low-capacitance Josephson junction circuits allowed for the realization of several kinds of superconducting qubits. Furthermore, coupling between qubits has been successfully achieved that was followed by the construction of multiple-qubit logic gates and the implementation of several algorithms. Here it is demonstrated that induced qubit lattice coherence as well as two remarkable quantum coherent optical phenomena, i.e., self-induced transparency and Dicke-type superradiance, may occur during light-pulse propagation in quantum metamaterials comprising superconducting charge qubits. The generated qubit lattice pulse forms a compound "quantum breather" that propagates in synchrony with the electromagnetic pulse. The experimental confirmation of such effects in superconducting quantum metamaterials may open a new pathway to potentially powerful quantum computing.
UR - http://www.scopus.com/inward/record.url?scp=84978427898&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84978427898&partnerID=8YFLogxK
U2 - 10.1038/srep29374
DO - 10.1038/srep29374
M3 - Article
AN - SCOPUS:84978427898
VL - 6
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 29374
ER -