Creating multicomponent Schrödinger cat states in a coupled qubit-oscillator system
- URL: http://arxiv.org/abs/2512.22380v1
- Date: Fri, 26 Dec 2025 20:51:34 GMT
- Title: Creating multicomponent Schrödinger cat states in a coupled qubit-oscillator system
- Authors: Pavel Stránský, Pavel Cejnar,
- Abstract summary: We prepare exotic modifications of Schrdinger cat states by coupling a semiclassical oscillator to a system of qubits.<n>The method can be implemented with the aid of current experimental techniques and may find applications in quantum information and sensing protocols.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We present a method for preparing various exotic modifications of Schrödinger cat states by coupling a semiclassical oscillator to a system of qubits. Varying the number of qubits and parameters of the quantum quench performed in the coupled system, we bring the oscillator into a~highly non-classical state composed of an arbitrary number of partly coherent wavepackets in tunable proportions and motion relations. The method can be implemented with the aid of current experimental techniques and may find applications in quantum information and sensing protocols.
Related papers
- Non-perturbative switching rates in bistable open quantum systems: from driven Kerr oscillators to dissipative cat qubits [72.41778531863143]
We use path integral techniques to predict the switching rate in a single-mode bistable open quantum system.<n>Our results open new avenues for exploring switching phenomena in multistable single- and many-body open quantum systems.
arXiv Detail & Related papers (2025-07-24T18:01:36Z) - Quantum Cryptography Using Momentum and Position Variables in a Simple Optical Arrangement [49.1574468325115]
We explore an experimental implementation of quantum key distribution (QKD) using position and momentum quantum states.<n>By employing a setup that includes a laser, a slit, and lenses, we demonstrate a variation of the BB84 protocol.
arXiv Detail & Related papers (2025-05-07T09:11:37Z) - Preparation of conditionally-squeezed states in qubit-oscillator systems [0.0]
We propose a protocol for generating superpositions of squeezed states in a quantum harmonic oscillator.<n>We numerically evaluate the robustness of the state-preparation scheme in the presence of decoherence.<n>As a potential application, we introduce a quantum error-correcting code based on conditionally-squeezed states and analyze its error-mitigation properties.
arXiv Detail & Related papers (2025-04-02T12:15:08Z) - Efficiency of Dynamical Decoupling for (Almost) Any Spin-Boson Model [44.99833362998488]
We analytically study the dynamical decoupling of a two-level system coupled with a structured bosonic environment.<n>We find sufficient conditions under which dynamical decoupling works for such systems.<n>Our bounds reproduce the correct scaling in various relevant system parameters.
arXiv Detail & Related papers (2024-09-24T04:58:28Z) - Quantum emulation of the transient dynamics in the multistate
Landau-Zener model [50.591267188664666]
We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity.
Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
arXiv Detail & Related papers (2022-11-26T15:04:11Z) - Quantum repeater via entangled phase modulated multimode coherent states [0.07068424156229525]
We present a scheme of quantum repeater that uses entangled multimode coherent states which are obtained by electro-optic modulation of symmetric and antisymmetric Schr"odinger cat states.
In this method subcarrier modes of the phase modulated states generated by the remote parties are sent to a symmetric beam splitter at the central node.
The entangled coherent states are heraldedly prepared by photon counting measurements at the output channels of the beam splitter.
arXiv Detail & Related papers (2022-11-07T14:35:59Z) - Entanglement catalysis for quantum states and noisy channels [41.94295877935867]
We investigate properties of entanglement and its role for quantum communication.
For transformations between bipartite pure states, we prove the existence of a universal catalyst.
We further develop methods to estimate the number of singlets which can be established via a noisy quantum channel.
arXiv Detail & Related papers (2022-02-10T18:36:25Z) - Transmon platform for quantum computing challenged by chaotic
fluctuations [55.41644538483948]
We investigate the stability of a variant of a many-body localized (MBL) phase for system parameters relevant to current quantum processors.
We find that these computing platforms are dangerously close to a phase of uncontrollable chaotic fluctuations.
arXiv Detail & Related papers (2020-12-10T19:00:03Z) - Variational Simulation of Schwinger's Hamiltonian with Polarisation
Qubits [0.0]
We study the effect of noise on the quantum phase transition in the Schwinger model.
Experiments are built using a free space optical scheme to realize a pair of polarization qubits.
We find that despite the presence of noise one can detect the phase transition of the Schwinger Hamiltonian even for a two-qubit system.
arXiv Detail & Related papers (2020-09-21T00:39:01Z) - Scheme for realizing quantum dense coding via entanglement swapping [0.0]
Quantum dense coding is a protocol for transmitting two classical bits of information from a sender to a remote receiver by sending only one quantum bit (qubit)
We propose an experimentally feasible scheme to realize quantum dense coding textitvia entanglement swapping in a cavity array containing a certain number of two-level atoms.
arXiv Detail & Related papers (2020-02-04T17:17:28Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.