Ground-state selection via many-body superradiant decay
- URL: http://arxiv.org/abs/2407.04129v2
- Date: Thu, 13 Mar 2025 18:37:31 GMT
- Title: Ground-state selection via many-body superradiant decay
- Authors: Wai-Keong Mok, Stuart J. Masson, Dan M. Stamper-Kurn, Tanya Zelevinsky, Ana Asenjo-Garcia,
- Abstract summary: We show that in many-body open quantum systems the occupation probability of one ground state can be boosted well beyond what is dictated by single-particle branching ratios.<n>We prove that, in the presence of permutation symmetry, this problem is exactly solvable for any number of competing channels.<n>Our results open new avenues for many-body strategies in the preparation and control of quantum systems.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: For a single particle, relaxation into different ground states is governed by fixed branching ratios determined by the transition matrix element and the environment. Here, we show that in many-body open quantum systems the occupation probability of one ground state can be boosted well beyond what is dictated by single-particle branching ratios. Despite the competition, interactions suppress all but the dominant decay transition, leading to a 'winner takes all' dynamic where the system primarily settles into the dominant ground state. We prove that, in the presence of permutation symmetry, this problem is exactly solvable for any number of competing channels. Additionally, we develop an approximate model for the dynamics by mapping the evolution onto a fluid continuity equation, and analytically demonstrate that the dominant transition ratio converges to unity as a power law with increasing system size, for any branching ratios. This near-deterministic preparation of the dominant ground state has broad applicability. As an example, we discuss a protocol for molecular photoassociation where collective dynamics effectively acts as a catalyst, amplifying the yield in a specific final state. Our results open new avenues for many-body strategies in the preparation and control of quantum systems.
Related papers
- Concomitant Entanglement and Control Criticality Driven by Collective Measurements [0.0]
We study Adaptive quantum circuits where a quantum many-body state is controlled using measurements and conditional unitary operations.
We find two types of nonequilibrium quantum phase transitions: measurement-induced transitions between volume- and area-law-entangled steady states and control-induced transitions where the system falls into an absorbing state.
We attribute this feature and the apparent coincidence of the control and entanglement transitions to the global nature of the control.
arXiv Detail & Related papers (2024-09-10T18:00:03Z) - Long-range multipartite entanglement near measurement-induced transitions [0.0]
We investigate the multipartite entanglement structure that emerges in hybrid quantum circuits involving unitaries and measurements.
We introduce a graphical representation based on spanning graphs that allows to infer the evolution of genuine multipartite entanglement for general subregions.
Our data is consistent with power-law decay with a tripartite exponent strictly larger than the one of the bipartite logarithmic negativity.
arXiv Detail & Related papers (2024-04-24T18:00:01Z) - Certifying ground-state properties of quantum many-body systems [4.377012041420585]
We show how to derive certifiable bounds on the value of any observable in the ground state.
We exploit the symmetries and sparsity of the considered systems to reach sizes of hundreds of particles.
arXiv Detail & Related papers (2023-10-09T16:40:19Z) - Arbitrary Amplification of Quantum Coherence in Asymptotic and Catalytic Transformation [0.0]
We show how well one can prepare good coherent states from low coherent states and whether a given coherent state is convertible to another one.
For a variant of coherence where one aims to prepare desired states in local subsystems, the rate of transformation becomes unbounded regardless of how weak the initial coherence is.
Applying this to the standard setting, we find that a catalyst can increase the coherence rate significantly -- from zero to infinite rate.
arXiv Detail & Related papers (2023-08-23T18:00:02Z) - 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) - Resolving nonclassical magnon composition of a magnetic ground state via
a qubit [44.99833362998488]
We show that a direct dispersive coupling between a qubit and a noneigenmode magnon enables detecting the magnonic number states' quantum superposition.
This unique coupling is found to enable control over the equilibrium magnon squeezing and a deterministic generation of squeezed even Fock states.
arXiv Detail & Related papers (2023-06-08T09:30:04Z) - 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) - Entanglement and localization in long-range quadratic Lindbladians [49.1574468325115]
Signatures of localization have been observed in condensed matter and cold atomic systems.
We propose a model of one-dimensional chain of non-interacting, spinless fermions coupled to a local ensemble of baths.
We show that the steady state of the system undergoes a localization entanglement phase transition by tuning $p$ which remains stable in the presence of coherent hopping.
arXiv Detail & Related papers (2023-03-13T12:45:25Z) - Quasiparticles of Decoherence Processes in Open Quantum Many-Body
Systems: Incoherentons [8.329456268842227]
We find that hitherto unrecognized quasiparticles -- incoherentons -- describe a coherent-to-incoherent transition in eigenmodes of a Liouvillian superoperator.
We demonstrate the existence of incoherentons in a lattice boson model subject to dephasing, and show that the quantum coherence gap closes when incoherentons are deconfined.
arXiv Detail & Related papers (2022-11-28T01:35:49Z) - Spreading of a local excitation in a Quantum Hierarchical Model [62.997667081978825]
We study the dynamics of the quantum Dyson hierarchical model in its paramagnetic phase.
An initial state made by a local excitation of the paramagnetic ground state is considered.
A localization mechanism is found and the excitation remains close to its initial position at arbitrary times.
arXiv Detail & Related papers (2022-07-14T10:05:20Z) - Entangled multiplets and unusual spreading of quantum correlations in a
continuously monitored tight-binding chain [0.0]
We analyze the dynamics of entanglement in a paradigmatic noninteracting system subject to continuous monitoring of the local densities.
Results shed new light onto the behavior of correlations in quantum dynamics and further show that these may be enhanced by a (weak) continuous monitoring process.
arXiv Detail & Related papers (2022-06-15T20:36:08Z) - Algebraic-Dynamical Theory for Quantum Many-body Hamiltonians: A
Formalized Approach To Strongly Interacting Systems [0.0]
Dynamical perturbation methods are the most widely used approaches for quantum many-body systems.
We formulate an algebraic-dynamical theory (ADT) by combining the power of quantum algebras and dynamical methods.
Applying ADT to many-body systems on lattices, we find that the quantum entanglement is represented by the cumulant structure of expectation values of the many-body COBS.
arXiv Detail & Related papers (2022-02-24T13:07:30Z) - Decimation technique for open quantum systems: a case study with
driven-dissipative bosonic chains [62.997667081978825]
Unavoidable coupling of quantum systems to external degrees of freedom leads to dissipative (non-unitary) dynamics.
We introduce a method to deal with these systems based on the calculation of (dissipative) lattice Green's function.
We illustrate the power of this method with several examples of driven-dissipative bosonic chains of increasing complexity.
arXiv Detail & Related papers (2022-02-15T19:00:09Z) - Engineered dissipation induced entanglement transition in quantum spin
chains: from logarithmic growth to area law [0.0]
Recent theoretical work has shown that the competition between coherent unitary dynamics and measurements can give rise to transitions in the entanglement scaling.
We consider an engineered dissipation, which stabilizes an entangled phase of a quantum spin$-1/2$ chain.
We find that the system undergoes an entanglement transition from a logarithmic growth to an area law when the competition ratio between the unitary evolution and the non-unitary dynamics increases.
arXiv Detail & Related papers (2021-06-18T12:41:01Z) - Intrinsic mechanisms for drive-dependent Purcell decay in
superconducting quantum circuits [68.8204255655161]
We find that in a wide range of settings, the cavity-qubit detuning controls whether a non-zero photonic population increases or decreases qubit decay Purcell.
Our method combines insights from a Keldysh treatment of the system, and Lindblad theory.
arXiv Detail & Related papers (2021-06-09T16:21:31Z) - Sensing quantum chaos through the non-unitary geometric phase [62.997667081978825]
We propose a decoherent mechanism for sensing quantum chaos.
The chaotic nature of a many-body quantum system is sensed by studying the implications that the system produces in the long-time dynamics of a probe coupled to it.
arXiv Detail & Related papers (2021-04-13T17:24:08Z) - Interplay between transport and quantum coherences in free fermionic
systems [58.720142291102135]
We study the quench dynamics in free fermionic systems.
In particular, we identify a function, that we dub emphtransition map, which takes the value of the stationary current as input and gives the value of correlation as output.
arXiv Detail & Related papers (2021-03-24T17:47:53Z) - Enhancement of quantum correlations and geometric phase for a driven
bipartite quantum system in a structured environment [77.34726150561087]
We study the role of driving in an initial maximally entangled state evolving under a structured environment.
This knowledge can aid the search for physical setups that best retain quantum properties under dissipative dynamics.
arXiv Detail & Related papers (2021-03-18T21:11:37Z) - Quantum Zeno effect appears in stages [64.41511459132334]
In the quantum Zeno effect, quantum measurements can block the coherent oscillation of a two level system by freezing its state to one of the measurement eigenstates.
We show that the onset of the Zeno regime is marked by a $textitcascade of transitions$ in the system dynamics as the measurement strength is increased.
arXiv Detail & Related papers (2020-03-23T18:17:36Z) - Einselection from incompatible decoherence channels [62.997667081978825]
We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators.
We show that Fock states remain the most robust states to decoherence up to a critical coupling.
arXiv Detail & Related papers (2020-01-29T14:15:19Z)
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.