Entanglement generation and quantum state transfer between two quantum dot molecules mediated by quantum bus of plasmonic circuits

2011 ◽  
Vol 99 (22) ◽  
pp. 223509 ◽  
Author(s):  
Mu-Tian Cheng ◽  
Xiao-San Ma ◽  
Ya-Qin Luo ◽  
Pei-Zhen Wang ◽  
Guang-Xing Zhao
Keyword(s):  
Quantum Dot ◽  
Quantum State ◽  
Quantum State Transfer ◽  
Entanglement Generation ◽  
Quantum Dot Molecules ◽  
State Transfer ◽  
Quantum Bus

scholarly journals Quantum State Transfer from a Single Photon to a Distant Quantum-Dot Electron Spin

2017 ◽  
Vol 119 (6) ◽  
Author(s):  
Yu He ◽  
Yu-Ming He ◽  
Yu-Jia Wei ◽  
Xiao Jiang ◽  
Kai Chen ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Quantum State ◽  
Electron Spin ◽  
Single Photon ◽  
Quantum State Transfer ◽  
State Transfer

Fast quantum state transfer in hybrid quantum dot-metal nanoparticle systems by shaping ultrafast laser pulses

2019 ◽  
Vol 52 (42) ◽  
pp. 425101 ◽  
Author(s):  
Yihong Qi ◽  
Chuan-Cun Shu ◽  
Daoyi Dong ◽  
Ian R Petersen ◽  
Kurt Jacobs ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Quantum State ◽  
Laser Pulses ◽  
Ultrafast Laser ◽  
Metal Nanoparticle ◽  
Quantum State Transfer ◽  
Ultrafast Laser Pulses ◽  
State Transfer

scholarly journals Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yadav P. Kandel ◽  
Haifeng Qiao ◽  
Saeed Fallahi ◽  
Geoffrey C. Gardner ◽  
Michael J. Manfra ◽  
...  
Keyword(s):  
Quantum Computing ◽  
Quantum Dot ◽  
Quantum State ◽  
Information Transfer ◽  
Full Potential ◽  
Quantum State Transfer ◽  
Spin Qubits ◽  
Semiconductor Quantum Dot ◽  
State Transfer ◽  
Spin Singlet

AbstractSemiconductor quantum-dot spin qubits are a promising platform for quantum computation, because they are scalable and possess long coherence times. In order to realize this full potential, however, high-fidelity information transfer mechanisms are required for quantum error correction and efficient algorithms. Here, we present evidence of adiabatic quantum-state transfer in a chain of semiconductor quantum-dot electron spins. By adiabatically modifying exchange couplings, we transfer single- and two-spin states between distant electrons in less than 127 ns. We also show that this method can be cascaded for spin-state transfer in long spin chains. Based on simulations, we estimate that the probability to correctly transfer single-spin eigenstates and two-spin singlet states can exceed 0.95 for the experimental parameters studied here. In the future, state and process tomography will be required to verify the transfer of arbitrary single qubit states with a fidelity exceeding the classical bound. Adiabatic quantum-state transfer is robust to noise and pulse-timing errors. This method will be useful for initialization, state distribution, and readout in large spin-qubit arrays for gate-based quantum computing. It also opens up the possibility of universal adiabatic quantum computing in semiconductor quantum-dot spin qubits.

scholarly journals Electro-optic entanglement source for microwave to telecom quantum state transfer

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Alfredo Rueda ◽  
William Hease ◽  
Shabir Barzanjeh ◽  
Johannes M. Fink
Keyword(s):  
Quantum State ◽  
Quantum Electrodynamics ◽  
New Combination ◽  
Microwave Cavity ◽  
Quantum State Transfer ◽  
Long Distance ◽  
Optical Pump ◽  
Entanglement Generation ◽  
State Transfer ◽  
Electro Optic

AbstractWe propose an efficient microwave-photonic modulator as a resource for stationary entangled microwave-optical fields and develop the theory for deterministic entanglement generation and quantum state transfer in multi-resonant electro-optic systems. The device is based on a single crystal whispering gallery mode resonator integrated into a 3D-microwave cavity. The specific design relies on a new combination of thin-film technology and conventional machining that is optimized for the lowest dissipation rates in the microwave, optical, and mechanical domains. We extract important device properties from finite-element simulations and predict continuous variable entanglement generation rates on the order of a Mebit/s for optical pump powers of only a few tens of microwatts. We compare the quantum state transfer fidelities of coherent, squeezed, and non-Gaussian cat states for both teleportation and direct conversion protocols under realistic conditions. Combining the unique capabilities of circuit quantum electrodynamics with the resilience of fiber optic communication could facilitate long-distance solid-state qubit networks, new methods for quantum signal synthesis, quantum key distribution, and quantum enhanced detection, as well as more power-efficient classical sensing and modulation.

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