Related papers: Robust population transfer by a detuning sign jump: from two-state quantum system to SU(2)-symmetric three-state quantum system

Robust population transfer by a detuning sign jump: from two-state quantum system to SU(2)-symmetric three-state quantum system

URL: http://arxiv.org/abs/2512.10432v1
Date: Thu, 11 Dec 2025 08:40:33 GMT
Title: Robust population transfer by a detuning sign jump: from two-state quantum system to SU(2)-symmetric three-state quantum system
Authors: Peter Chernev, Andon A. Rangelov,
Abstract summary: We analyze a robust population-transfer protocol in a driven two-level system based on a sudden sign change of the detuning.<n>We show that for strong coupling the protocol yields almost complete population transfer between the two outer states.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We propose and analyze a robust population-transfer protocol in a driven two-level system based on a sudden sign change of the detuning at the maximum of a smooth coupling pulse. Away from the jump the dynamics is adiabatic, while the sign flip produces a single nonadiabatic kick in the adiabatic basis. Within a simple stepwise adiabatic-sudden approximation we obtain a compact analytic expression for the final transition probability, identify the parameter regimes that yield high-fidelity inversion, and show that the result depends only on the change of the mixing angle across the detuning jump, i.e., solely on the ratio of the peak Rabi frequency to the detuning. Numerical simulations of the full time-dependent Schrödinger equation confirm the validity and robustness of this description over a broad parameter range. We then use the Majorana decomposition to extend the scheme to an SU(2)-symmetric three-state chain driven by the same coupling and detuning functions. In this setting the three-state propagator is expressed in closed form through the two-level Cayley-Klein parameters, which allows us to derive explicit transition probabilities for all three initial states. In particular, we show that for strong coupling the protocol yields almost complete population transfer between the two outer states, with only small transient population of the middle state, while retaining the same intrinsic robustness as in the underlying two-level model.

Related papers

Imaginary-time-enhanced feedback-based quantum algorithms for universal ground-state preparation [0.0]
We introduce an imaginary-time-enhanced FALQON scheme, which inserts short imaginary-time evolution steps into the feedback loop.<n>The hybrid method suppresses excited-state components, escapes subspaces, and restores monotonic energy descent.<n>ITE-FALQON achieves a reliable ground-state convergence across all fillings.
arXiv Detail & Related papers (2025-12-15T07:12:03Z)
Highly robust logical qubit encoding in an ensemble of V-symmetrical qutrits [0.0]
Even and odd Schdinger cat states are formed from coherent states of U(3) of an ensemble of qutrits with a symmetrical V-configuration.<n>We show how to implement the single-qubit quantum NOT gate and the Hadamard gate followed by either the phase gate or the phase and $Z$ gates.
arXiv Detail & Related papers (2025-12-05T23:50:40Z)
Bimodal phase transition in a periodically modulated $Λ$-type three-level system [0.0]
We present a theoretical investigation of dynamical quantum phase transitions (QPTs) in a periodically driven $Lambda$-type three-level system.<n>Our results provide an insight into the manipulation of quantum phases in a three-level system within an effective extended Jaynes-Cummings regime.
arXiv Detail & Related papers (2025-08-03T07:31:43Z)
Superradiant phase transitions in the quantum Rabi model: Overcoming the no-go theorem through anisotropy [30.342686040430962]
Superradiant phase transition (SRPT) is prohibited in the paradigmatic quantum Rabi model.<n>We show two distinct types of SRPTs emerging from the normal phase in the anisotropic quantum Rabi model.
arXiv Detail & Related papers (2024-12-11T11:33:29Z)
Third quantization with Hartree approximation for open-system bosonic transport [49.1574468325115]
We present a self-consistent formalism for solving the open-system bosonic Lindblad equation with weak interactions in the steady state.<n>The method allows us to characterize and predict large-system behavior of quantum transport in interacting bosonic systems relevant to cold-atom experiments.
arXiv Detail & Related papers (2024-08-23T15:50:48Z)
Measurement-Induced Transmon Ionization [69.65384453064829]
We develop a comprehensive framework which provides a physical picture of the origin of transmon ionization. This framework identifies the multiphoton resonances responsible for transmon ionization. It also allows one to efficiently compute numerical estimates of the photon number threshold for ionization.
arXiv Detail & Related papers (2024-02-09T18:46:50Z)
Control landscape of measurement-assisted transition probability for a three-level quantum system with dynamical symmetry [77.34726150561087]
Quantum systems with dynamical symmetries have conserved quantities which are preserved under coherent controls. Incoherent control can increase the maximal attainable transition probability. We show that all critical points are global maxima, global minima, saddle points and second order traps.
arXiv Detail & Related papers (2023-07-14T16:12:21Z)
Message-Passing Neural Quantum States for the Homogeneous Electron Gas [41.94295877935867]
We introduce a message-passing-neural-network-based wave function Ansatz to simulate extended, strongly interacting fermions in continuous space. We demonstrate its accuracy by simulating the ground state of the homogeneous electron gas in three spatial dimensions.
arXiv Detail & Related papers (2023-05-12T04:12:04Z)
Dissipative preparation and stabilization of many-body quantum states in a superconducting qutrit array [55.41644538483948]
We present and analyze a protocol for driven-dissipatively preparing and stabilizing a manifold of quantum manybody entangled states. We perform theoretical modeling of this platform via pulse-level simulations based on physical features of real devices. Our work shows the capacity of driven-dissipative superconducting cQED systems to host robust and self-corrected quantum manybody states.
arXiv Detail & Related papers (2023-03-21T18:02:47Z)
Three-state coherent control using narrowband and passband sequences [12.773394357238725]
We propose a comprehensive design for narrowband and passband composite pulse sequences. The design is quite universal as all pulse parameters can be freely employed to modify the coefficients of error terms. The current sequences are capable of tolerating inaccurate waveforms, detunings errors, and work well when rotating wave approximation is not strictly justified.
arXiv Detail & Related papers (2022-05-28T13:29:22Z)
Non-Gaussian superradiant transition via three-body ultrastrong coupling [62.997667081978825]
We introduce a class of quantum optical Hamiltonian characterized by three-body couplings. We propose a circuit-QED scheme based on state-of-the-art technology that implements the considered model.
arXiv Detail & Related papers (2022-04-07T15:39:21Z)
Composite pulses for high fidelity population transfer in three-level systems [6.743193621855191]
We propose a composite pulses scheme by modulating phases to achieve high fidelity population transfer in three-level systems. As an example, we employ the composite pulses sequence for achieving the three-atom singlet state in an atom-cavity system with ultrahigh fidelity.
arXiv Detail & Related papers (2022-02-16T06:50:48Z)
Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
arXiv Detail & Related papers (2021-02-01T18:09:01Z)

This list is automatically generated from the titles and abstracts of the papers in this site.