Realization of arbitrary state-transfer via superadiabatic passages in a superconducting circuit

2019 ◽  
Vol 115 (7) ◽  
pp. 072603
Author(s):  
Zhen Yang ◽  
Xinsheng Tan ◽  
Yuqian Dong ◽  
Xiaopei Yang ◽  
Shuqing Song ◽  
...  
Keyword(s):  
Arbitrary State ◽  
Superconducting Circuit ◽  
State Transfer

Lyapunov-based state transfer and maintenance for non-Markovian quantum system

2016 ◽  
Vol 30 (25) ◽  
pp. 1650177 ◽  
Author(s):  
Juju Hu ◽  
Qiang Ke ◽  
Yinghua Ji
Keyword(s):  
Quantum System ◽  
Quantum Control ◽  
Control Function ◽  
Lyapunov Stability Theory ◽  
Control Field ◽  
Arbitrary State ◽  
State Transfer ◽  
The Right ◽  
And Function ◽  
Markovian System

One main problem of quantum control in quantum systems is the manipulation of states including state transfer and state tracking. We design control fields to realize arbitrary state transfer for open quantum system by Lyapunov stability theory, and investigate the state transfer for non-Markovian system with phase relaxation and energy dissipative relaxation. The numerical simulations illustrate that arbitrary state (eigenstate, superposition state or mixed state) transfer and maintenance for non-Markovian system can be realized under Lyapunov control function by an external steady control field of proper amplitude, with a success rate of more than 98%. When the right control field and function are implemented, not only the decoherence is compensated completely but also the purity of quantum states is maintained in the process of state transfer.

scholarly journals Electric field control of radiative heat transfer in a superconducting circuit

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Olivier Maillet ◽  
Diego Subero ◽  
Joonas T. Peltonen ◽  
Dmitry S. Golubev ◽  
Jukka P. Pekola
Keyword(s):  
Heat Transfer ◽  
Electric Field ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Superconducting Circuit ◽  
Field Control

scholarly journals A phononic interface between a superconducting quantum processor and quantum networked spin memories

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Tomáš Neuman ◽  
Matt Eichenfield ◽  
Matthew E. Trusheim ◽  
Lisa Hackett ◽  
Prineha Narang ◽  
...  
Keyword(s):  
Quantum State ◽  
Piezoelectric Transducers ◽  
High Fidelity ◽  
Hybrid Architecture ◽  
Quantum Networks ◽  
Superconducting Circuit ◽  
Artificial Atom ◽  
Experimental Parameters ◽  
Quantum Processor ◽  
State Spin

AbstractWe introduce a method for high-fidelity quantum state transduction between a superconducting microwave qubit and the ground state spin system of a solid-state artificial atom, mediated via an acoustic bus connected by piezoelectric transducers. Applied to present-day experimental parameters for superconducting circuit qubits and diamond silicon-vacancy centers in an optimized phononic cavity, we estimate quantum state transduction with fidelity exceeding 99% at a MHz-scale bandwidth. By combining the complementary strengths of superconducting circuit quantum computing and artificial atoms, the hybrid architecture provides high-fidelity qubit gates with long-lived quantum memory, high-fidelity measurement, large qubit number, reconfigurable qubit connectivity, and high-fidelity state and gate teleportation through optical quantum networks.

Atom‐Mediated Phonon Blockade and Controlled‐Z Gate in Superconducting Circuit System

2021 ◽  
pp. 2100039
Author(s):  
Chengsong Zhao ◽  
Rui Peng ◽  
Zhen Yang ◽  
Shilei Chao ◽  
Chong Li ◽  
...  
Keyword(s):  
Superconducting Circuit

scholarly journals Separation of variables in AdS/CFT: functional approach for the fishnet CFT

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Andrea Cavaglià ◽  
Nikolay Gromov ◽  
Fedor Levkovich-Maslyuk
Keyword(s):  
Integrable Systems ◽  
Density Operator ◽  
Numerical Evaluation ◽  
Lagrangian Density ◽  
Separation Of Variables ◽  
Functional Approach ◽  
Quantum Integrable Systems ◽  
Arbitrary State ◽  
Nontrivial Coupling ◽  
The One

Abstract The major simplification in a number of quantum integrable systems is the existence of special coordinates in which the eigenstates take a factorised form. Despite many years of studies, the basis realising the separation of variables (SoV) remains unknown in $$ \mathcal{N} $$ N = 4 SYM and similar models, even though it is widely believed they are integrable. In this paper we initiate the SoV approach for observables with nontrivial coupling dependence in a close cousin of $$ \mathcal{N} $$ N = 4 SYM — the fishnet 4D CFT. We develop the functional SoV formalism in this theory, which allows us to compute non-perturbatively some nontrivial observables in a form suitable for numerical evaluation. We present some applications of these methods. In particular, we discuss the possible SoV structure of the one-point correlators in presence of a defect, and write down a SoV-type expression for diagonal OPE coefficients involving an arbitrary state and the Lagrangian density operator. We believe that many of the findings of this paper can be applied in the $$ \mathcal{N} $$ N = 4 SYM case, as we speculate in the last part of the article.

scholarly journals Photon-Instanton Collider Implemented by a Superconducting Circuit

2021 ◽  
Vol 126 (13) ◽  
Author(s):  
Amir Burshtein ◽  
Roman Kuzmin ◽  
Vladimir E. Manucharyan ◽  
Moshe Goldstein
Keyword(s):  
Superconducting Circuit

Reliability analysis and state transfer scheduling optimization of degrading load-sharing system equipped with warm standby components

2021 ◽  
pp. 1748006X2110017
Author(s):  
Sheng-Jia Ruan ◽  
Yan-Hui Lin
Keyword(s):  
Reliability Analysis ◽  
System Reliability ◽  
High Reliability ◽  
Quadrature Rule ◽  
Load Sharing ◽  
Measurement Information ◽  
Model Parameters ◽  
Scheduling Optimization ◽  
State Transfer ◽  
Warm Standby

Standby redundancy can meet system safety requirements in industries with high reliability standards. To evaluate reliability of standby systems, failure dependency among components has to be considered especially when systems have load-sharing characteristics. In this paper, a reliability analysis and state transfer scheduling optimization framework is proposed for the load-sharing 1-out-of- N: G system equipped with M warm standby components and subject to continuous degradation process. First, the system reliability function considering multiple dependent components is derived in a recursive way. Then, a Monte Carlo method is developed and the closed Newton-Cotes quadrature rule is invoked for the system reliability quantification. Besides, likelihood functions are constructed based on the measurement information to estimate the model parameters of both active and standby components, whose degradation paths are modeled by the step-wise drifted Wiener processes. Finally, the system state transfer scheduling is optimized by the genetic algorithm to maximize the system reliability at mission time. The proposed methodology and its effectiveness are illustrated through a case study referring to a simplified aircraft hydraulic system.

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