Spin-orbit couplings between distant electrons trapped individually on liquid helium

Zhang, M.; Wei, L. F.

doi:10.1103/physrevb.86.205408

Cited by 8 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this way, the spin qubit can be read out and different spin qubits can be coupled via the superconducting resonator. Alternatively, the spin states of adjacent electrons can interact with each other via the coupling of the spin state of each electron to a normal mode of the collective in-plane vibration of the electrons arising due to the Coulomb interaction [30,31].…”

Section: Introductionmentioning

confidence: 99%

Blueprint for quantum computing using electrons on helium

Kawakami,

Chen,

Benito

et al. 2023

Phys. Rev. Applied

View full text Add to dashboard Cite

We present a blueprint for building a fault-tolerant quantum computer using the spin states of electrons on the surface of liquid helium. We propose to use ferromagnetic micropillars to trap single electrons on top of them and to generate a local magnetic field gradient. Introducing a local magnetic field gradient hybridizes charge and spin degrees of freedom, which allows us to benefit from both the long coherence time of the spin state and the long-range Coulomb interaction that affects the charge state. We present concrete schemes to realize single-and two-qubit gates and quantum nondemolition readout. In our framework, the hybridization of charge and spin degrees of freedom is large enough to perform fast qubit gates and small enough not to degrade the coherence time of the spin state significantly, which leads to the realization of high-fidelity qubit gates.

show abstract

Section: Introductionmentioning

confidence: 99%

Blueprint for quantum computing using electrons on helium

Kawakami,

Chen,

Benito

et al. 2023

Phys. Rev. Applied

View full text Add to dashboard Cite

show abstract

“…Electrons floating on liquid helium surface have been considered as an alternative physical system to implement quantum computation [1][2][3][4][5][6][7][8][9][10][11]. Sommer first noticed that there is a barrier at the surface of liquid helium that prevents electrons from entering its interior [12].…”

Section: Introductionmentioning

confidence: 99%

Electric Current Induced by Microwave Stark Effect of Electrons on Liquid Helium

Wang¹,

Zhang²,

Wei³

2022

Preprint

Self Cite

View full text Add to dashboard Cite

We propose a frequency-mixed effect of Terahertz (THz) and Gigahertz (GHz) electromagnetic waves in the cryogenic system of electrons floating on liquid helium surface. The THz wave is near-resonant with the transition frequency between the lowest two levels of surface state electrons. The GHz wave does not excite the transitions but generates a GHz-varying Stark effect with the symmetry-breaking eigenstates of electrons on liquid helium. We show an effective coupling between the inputting THz and GHz waves, which appears at the critical point that the detuning between electrons and THz wave is equal to the frequency of GHz wave. By this coupling, the THz and GHz waves cooperatively excite electrons and generate the low-frequency ac currents along the perpendicular direction of liquid helium surface to be experimentally detected by the image-charge approach [Phys. Rev. Lett. 123, 086801 (2019)]. This offers an alternative approach for THz detections. IntroductionElectrons floating on liquid helium surface have been considered as an alternative physical system to implement quantum computation [1][2][3][4][5][6][7][8][9][10][11]. Sommer first noticed that there is a barrier at the surface of liquid helium that prevents electrons from entering its interior [12]. Therefore, in addition to the attractive force of image charge in liquid helium, the surface electron forms a one-dimensional (1D) hydrogen atom above liquid helium surface [13][14][15]. The two lowest levels of the 1D hydrogen atoms have been proposed to encode the qubits, which have good scalability due to the strong Coulomb interactions between electrons [1]. However, the single electron detection is still very difficult in experiments. Recently, E. Kawakami et.al. have used the image-charge approach to experimentally detect the Rydberg states of surface electrons on liquid helium [16]. Compared with the conventional microwave absorption method, this method may be more effective to detect the quantum state of surface electrons [17,18].The transition frequency between the lowest two levels of surface electrons is in the regime of Terahertz (THz) and therefore has perhaps applications in the fields of THz detection and generation. The THz spectrum is between the usual microwave and infrared regions, and has many practical applications [19], such as THz wireless communication [20], astronomical observation [21], Earth's atmosphere monitoring [22], and the food safety [23]. Specially, in biological and medical fields [24,25], THz imaging have smaller damages in body than X-ray, but higher resolution than mechanical supersonic waves.In this paper, we show a frequency-mixed effect of the THz and the Gigahertz (GHz) electromagnetic waves in the system of electrons floating on liquid helium. This effect could be applied to detect THz radiation. In our mixer, the inputting THz wave near-resonantly excites the transition between the lowest two levels of surface state electrons. The GHz wave does not excite the transitions but generates a GHz-varying Stark effect. T...

show abstract

“…The dynamical evolution of Hamiltonian ( 18) can be given by the following time-evolution operator [17]…”

mentioning

confidence: 99%

Coupling Distant Spins of Surface-State Electrons by Manipulating Their Collective Vibrations

Zeng

Zhang

Wei

2014

Commun. Theor. Phys.

View full text Add to dashboard Cite

The system of electrons on liquid helium is an interesting candidate to implement quantum computation, due to the long coherence times of the qubits encoded by the electronic spins. In order to implement the quantum logic operations between the spins, we propose here a configuration, similarly to the cooled ions in a trap, to couple the distant electrons via manipulating their center of mass (CM) vibrations. First, we show that the electrons could be confined in a common harmonic oscillator potential by using an electrostatic field. Then, with a single current pulse (applied on the micro-electrode below the liquid helium) the distant electronic spins can be coupled simultaneously to the CM mode. Finally, by adiabatically eliminating the CM mode, effective interaction between the distant spins is induced for implementing the desired quantum computing.

show abstract

Spin-orbit couplings between distant electrons trapped individually on liquid helium

Cited by 8 publications

References 28 publications

Blueprint for quantum computing using electrons on helium

Blueprint for quantum computing using electrons on helium

Electric Current Induced by Microwave Stark Effect of Electrons on Liquid Helium

Coupling Distant Spins of Surface-State Electrons by Manipulating Their Collective Vibrations

Contact Info

Product

Resources

About