Erratum: “Individual two-axis control of three singlet-triplet qubits in a micromagnet integrated quantum dot array” [Appl. Phys. Lett. <b>117</b>, 234001 (2020)]
نویسندگان
چکیده
We report individual confinement and two-axis qubit operations of two electron spin qubits in GaAs gate-defined sextuple quantum dot array with integrated micro-magnet. As a first step toward multiple operations, we demonstrate coherent manipulations three singlet-triplet showing underdamped Larmor Ramsey oscillations all double sites. provide an accurate measure site site-dependent field gradients rms electric magnetic noise, discuss the adequacy simple rectangular micro-magnet for practical use arrays. also current limitations possible strategies realizing simultaneous multi multi-qubit extended linear
منابع مشابه
Two-axis control of a singlet-triplet qubit with an integrated micromagnet.
The qubit is the fundamental building block of a quantum computer. We fabricate a qubit in a silicon double-quantum dot with an integrated micromagnet in which the qubit basis states are the singlet state and the spin-zero triplet state of two electrons. Because of the micromagnet, the magnetic field difference ΔB between the two sides of the double dot is large enough to enable the achievement...
متن کاملHybrid spin and valley quantum computing with singlet-triplet qubits.
The valley degree of freedom in the electronic band structure of silicon, graphene, and other materials is often considered to be an obstacle for quantum computing (QC) based on electron spins in quantum dots. Here we show that control over the valley state opens new possibilities for quantum information processing. Combining qubits encoded in the singlet-triplet subspace of spin and valley sta...
متن کاملEffect of Temperature and Pressure on Correlation Energy in a Triplet State of a Two Electron Spherical Quantum Dot
The combined effect of hydrostatic pressure and temperature on correlation energy in a triplet state of two electron spherical quantum dot with square well potential is computed. The result is presented taking GaAs dot as an example. Our result shows the correlation energies are i)negative in the triplet state contrast to the singlet state ii) it increases with increase in pressure iii)further...
متن کاملComment on ‘ ‘ Quantum waveguide array generator for performing Fourier transforms : Alternate route to quantum computing ’ ’ † Appl . Phys . Lett . 79 , 2823 „ 2001
In their letter Akis and Ferry propose a quantum waveguide array approach for performing quantum Fourier transforms ~QFTs!. The waveguide produces 2 waves at its output with controllable relative phases; n is the number of binary splits of the input wave. The interference pattern from these waves is recorded and implements a Fourier transform. The authors claim that their waveguide approach is ...
متن کاملSinglet-Triplet Relaxation in Two-electron Silicon Quantum Dots
We investigate the singlet-triplet relaxation process of a two electron silicon quantum dot. In the absence of a perpendicular magnetic field, we find that spin-orbit coupling is not the main source of singlet-triplet relaxation. Relaxation in this regime occurs mainly via virtual states and is due to nuclear hyperfine coupling. In the presence of an external magnetic field perpendicular to the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2021
ISSN: ['1520-8842', '0003-6951', '1077-3118']
DOI: https://doi.org/10.1063/5.0041232