Quantum control of nuclear-spin qubits in a rapidly rotating diamond

Wood, Alexander; Goldblatt, R. M.; Scholten, R. E.; Martin, Andy M.

doi:10.1103/physrevresearch.3.043174

Cited by 10 publications

(7 citation statements)

References 52 publications

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“…We choose to focus on the n = 10 path here since the required rotation time is in line with similar experimental set-ups which have already exposed Berry phase splittings in a rotating NaClO 3 crystal 28 as well as measurements of a rapidly rotating diamond qubit. 48,49…”

Section: Resultsmentioning

confidence: 99%

“…We choose to focus on the n = 10 path here since the required rotation time is in line with similar experimental setups which have already exposed Berry phase splittings in a rotating NaClO 3 crystal 28 as well as measurements of a rapidly rotating diamond qubit. 48,49 To investigate the coherent dynamics of the quasidegenerate tunnelling states during rotation as well as to verify the assumptions leading to eqn (13), we numerically integrated the time-dependent Schro ¨dinger equation for the rotating TbPc 2 molecule using the Hamiltonian from eqn (16). The resultant amplitudes |c AE (t)| of the tunnelling states |f AE i are plotted as functions of time t in Fig.…”

Section: Tbpc 2 As a Rotating Qubit Candidatementioning

confidence: 99%

“…To observe a rotation-induced coherent dynamics between the tunnel split ground doublet states for such a large D, would require rotations to be performed with T o 50 ns which is several orders of magnitude faster than conventional set-ups so far reported in the literature. 28,48,49 Nevertheless, more sophisticated molecular rotor systems may in the future be leveraged to achieve such rapid, constrained rotations. 52 We note in addition, that our theoretical model has not accounted for population transfer between the energy eigenstates of H S mediated by incoherent transitions from the local environment.…”

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confidence: 99%

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Triggering single-molecule qubit spin dynamics via non-Abelian geometric phase effects

Hymas,

Soncini

2023

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

Section: Tbpc 2 As a Rotating Qubit Candidatementioning

confidence: 99%

mentioning

confidence: 99%

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Triggering single-molecule qubit spin dynamics via non-Abelian geometric phase effects

Hymas,

Soncini

2023

Phys. Chem. Chem. Phys.

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“…Þ , changes as a function of the rotation phase ϕ(t) of the levitated nanodiamond. The Rabi frequency Ω Rabi can be written as 61,62 :…”

Section: Quantum Control Of Fast-rotating Nv Centersmentioning

confidence: 99%

Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum

Jin,

Shen,

et al. 2024

Nat Commun

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Levitated diamond particles in high vacuum with internal spin qubits have been proposed for exploring macroscopic quantum mechanics, quantum gravity, and precision measurements. The coupling between spins and particle rotation can be utilized to study quantum geometric phase, create gyroscopes and rotational matter-wave interferometers. However, previous efforts in levitated diamonds struggled with vacuum level or spin state readouts. To address these gaps, we fabricate an integrated surface ion trap with multiple stabilization electrodes. This facilitates on-chip levitation and, for the first time, optically detected magnetic resonance measurements of a nanodiamond levitated in high vacuum. The internal temperature of our levitated nanodiamond remains moderate at pressures below 10−5 Torr. We have driven a nanodiamond to rotate up to 20 MHz (1.2 × 109 rpm), surpassing typical nitrogen-vacancy (NV) center electron spin dephasing rates. Using these NV spins, we observe the effect of the Berry phase arising from particle rotation. In addition, we demonstrate quantum control of spins in a rotating nanodiamond. These results mark an important development in interfacing mechanical rotation with spin qubits, expanding our capacity to study quantum phenomena.

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“…Recent work has analyzed the rotation of the crystal in Refs. [57][58][59]. We will need revisit this issue separately once we fully analyze the largest superposition size we can obtain.…”

Section: Introductionmentioning

confidence: 99%

Mass-independent scheme for enhancing spatial quantum superpositions

et al. 2023

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Placing a large mass in a large spatial superposition, such as a Schrödinger cat state, is a significant and important challenge. In particular, the large spatial superposition [O(10-100) µm] of mesoscopic masses [m ∼ O(10 −14 -10 −15 ) kg] makes it possible to test the quantum nature of gravity via entanglement in the laboratory. To date, the proposed methods of achieving this spatial delocalization are to use wave-packet expansions or quantum ancilla-(for example, spin-) dependent forces, all of whose efficacy reduces with mass. Thus increasing the spatial splitting independently of the mass is an important open challenge. In this paper we present a method of achieving a mass-independent enhancement of superposition via diamagnetic repulsion from current-carrying wires. We analyze an example system which uses the Stern-Gerlach effect to creating a small initial splitting and then apply our diamagnetic repulsion method to enhance the superposition size O(400-600) µm from an initial modest split of the wave function. We provide an analytical and numerical analysis of our scheme.

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Quantum control of nuclear-spin qubits in a rapidly rotating diamond

Cited by 10 publications

References 52 publications

Triggering single-molecule qubit spin dynamics via non-Abelian geometric phase effects

Triggering single-molecule qubit spin dynamics via non-Abelian geometric phase effects

Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum

Mass-independent scheme for enhancing spatial quantum superpositions

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