Quantum metamaterials with complete graph interfaces in the ultrastrong coupling regime

IF 1.4 4区 物理与天体物理 Q3 OPTICS
P V Zacharenko, D V Tsarev, M M Nikitina and A P Alodjants
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引用次数: 0

Abstract

This work studies the ultrastrong coupling (USC) regime for quantized electromagnetic (EM) fields interacting with two-level systems (qubits) arranged within the complete graph nodes of photonic networks beyond the rotating wave approximation. We show the nontrivial behavior of Bloch–Siegert (BS) phase inherent to the field is established in the structure. The collective BS phase dominates under the strong matter-field coupling condition. The network complete graph interface significantly improves the cooperativity parameter to achieve this condition. However, increasing the coupling parameter essentially beyond the strong coupling condition causes saturation effects that suppress the collective photonic phase. We demonstrate that in the USC regime the EM field exhibits the features of a single qubit BS phase enhanced by the network connectivity. Our findings open new perspectives in quantum information processing with superconductor metamaterials.
超强耦合机制下具有完整图形界面的量子超材料
这项工作研究了量子化电磁(EM)场与光子网络完整图节点内排列的两级系统(量子比特)相互作用的超强耦合(USC)机制,超越了旋转波近似。我们在该结构中展示了场固有的布洛赫-西格特(BS)相位的非凡行为。在强物质-场耦合条件下,集体 BS 相占据主导地位。网络完整图界面大大提高了实现这一条件的合作性参数。然而,增加耦合参数基本上超过强耦合条件会导致饱和效应,从而抑制集体光子相。我们证明,在 USC 状态下,电磁场呈现出单个量子比特 BS 相的特征,网络连接性增强了这一特征。我们的发现为利用超导体超材料进行量子信息处理开辟了新的前景。
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来源期刊
Laser Physics Letters
Laser Physics Letters 物理-仪器仪表
CiteScore
3.30
自引率
11.80%
发文量
174
审稿时长
2.4 months
期刊介绍: Laser Physics Letters encompasses all aspects of laser physics sciences including, inter alia, spectroscopy, quantum electronics, quantum optics, quantum electrodynamics, nonlinear optics, atom optics, quantum computation, quantum information processing and storage, fiber optics and their applications in chemistry, biology, engineering and medicine. The full list of subject areas covered is as follows: -physics of lasers- fibre optics and fibre lasers- quantum optics and quantum information science- ultrafast optics and strong-field physics- nonlinear optics- physics of cold trapped atoms- laser methods in chemistry, biology, medicine and ecology- laser spectroscopy- novel laser materials and lasers- optics of nanomaterials- interaction of laser radiation with matter- laser interaction with solids- photonics
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