Strong driving of a single spin using arbitrarily polarized fields

London, Paz; Balasubramanian, Priyadharshini; Naydenov, Boris; McGuinness, Liam P.; Jelezko, Fedor

doi:10.1103/physreva.90.012302

Cited by 51 publications

(46 citation statements)

References 33 publications

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“…3). The phaseaveraged time evolution is almost identical to that obtained in other qubit systems 22 , and taking into account the readout and initialization fidelities, which limit the amplitude of the oscillations, it matches the experimental data almost perfectly [see Fig. 2(a)].…”

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confidence: 79%

Breaking the rotating wave approximation for a strongly driven dressed single-electron spin

et al. 2016

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We investigate the dynamics of a strongly-driven, microwave-dressed, donor-bound electron spin qubit in silicon. A resonant oscillating magnetic field B1 is used to dress the electron spin and create a new quantum system with a level splitting proportional to B1. The dressed two-level system can then be driven by modulating the detuning ∆ν between the microwave source frequency νMW and the electron spin transition frequency νe at the frequency of the level splitting. The resulting dressed qubit Rabi frequency ΩRρ is defined by the modulation amplitude, which can be made comparable to the level splitting using frequency modulation on the microwave source. This allows us to investigate the regime where the rotating wave approximation breaks down, without requiring microwave power levels that would be incompatible with a cryogenic environment. We observe clear deviations from normal Rabi oscillations and can numerically simulate the time evolution of the states in excellent agreement with the experimental data.

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confidence: 79%

Breaking the rotating wave approximation for a strongly driven dressed single-electron spin

et al. 2016

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“…Such microwave cavities require particular designs and have been demonstrated using transmission line resonators [41][42][43] and three-dimensional superconducting Fabry-Pérot microwave cavities [44][45][46]. The Q factor of the transmission line resonator can be 100 − 10 5 [41,47], while that of the superconducting FP mw cavity can reach 10 12 [44].…”

Section: Discussion Of Experimental Implementationmentioning

confidence: 99%

“…This PC cavity can also possess two degenerate modes with orthogonal polarizations [49][50][51]. In recent works [41,42], the magnetic transition between the triplet ground states of NV centers has been selectively driven with circularly-polarized microwave fields in microstrip mw resonators. Thus many of the essential components for our scheme have already been experimentally demonstrated.…”

Section: Discussion Of Experimental Implementationmentioning

confidence: 99%

Detection of a weak magnetic field via cavity-enhanced Faraday rotation

2015

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We study the sensitive detection of a weak static magnetic field via Faraday rotation induced by an ensemble of spins in a bimodal degenerate microwave cavity. We determine the limit of the resolution for the sensitivity of the magnetometry achieved using either single-photon or multiphoton inputs. For the case of a microwave cavity containing an ensemble of Nitrogen-vacancy defects in diamond, we obtain a magnetometry sensitivity exceeding 0.5 nT/ √ Hz, utilizing a single photon probe field, while for a multiphoton input we achieve a sensitivity about 1fT/ √ Hz, using a coherent probe microwave field with power of Pin = 1 nW.

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“…In this regime, the system's dynamics are highly anharmonic and nonlinear, but not chaotic [8,9]. Recently, the strong-driving regime has been of particular interest to quantum information processing because of the ultra-fast quantum gates possible in this regime [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamics of a two-level system of a single spin driven beyond the rotating-wave approximation

Rao

Suter

2017

Phys. Rev. A

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Quantum systems driven by strong oscillating fields are the source of many interesting physical phenomena. In this work, we experimentally study the dynamics of a two-level system of a single spin driven in the strong-driving regime where the rotating-wave approximation is not valid. This two-level system is a subsystem of a single Nitrogen-Vacancy center in diamond coupled to a firstshell 13 C nuclear spin at a level anti-crossing point. This near-degeneracy occurs in the ms = ±1 manifold of the electron spin when the energy level splitting between the ms = −1 and +1 states due to the static magnetic field is ≈ 127 MHz and thus equal to the splitting due to the 13 C hyperfine interaction. The transition frequency of this electron spin two-level system in a static magnetic field of 28.9 G is 1.7 MHz and it can be driven only by the component of the RF field along the NV symmetry axis. Electron spin Rabi frequencies in this system can reach tens of MHz even for moderate RF powers. The simple sinusoidal Rabi oscillations that occur when the amplitude of the driving field is small compared to the transition frequency evolve into complex patterns when the driving field amplitude is comparable to or greater than the energy level splitting. We observe that the system oscillates faster than the amplitude of the driving field and the response of the system shows multiple frequencies.

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Strong driving of a single spin using arbitrarily polarized fields

Cited by 51 publications

References 33 publications

Breaking the rotating wave approximation for a strongly driven dressed single-electron spin

Breaking the rotating wave approximation for a strongly driven dressed single-electron spin

Detection of a weak magnetic field via cavity-enhanced Faraday rotation

Nonlinear dynamics of a two-level system of a single spin driven beyond the rotating-wave approximation

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