<p>In this paper, we consider the time (quasi)-periodic quantum Hamiltonian of the form <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="23_2024_1533_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="135" /> </InlineMediaObject> <EquationSource Format="TEX">\(\textrm{H}(t)=\textrm{H}_\gamma +\textrm{V}(\omega t)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>H</mtext> <mrow> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> </mrow> <mo>=</mo> <msub> <mtext>H</mtext> <mi>γ</mi> </msub> <mo>+</mo> <mtext>V</mtext> <mrow> <mo stretchy="false">(</mo> <mi>ω</mi> <mi>t</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, where <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="23_2024_1533_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="21" /> </InlineMediaObject> <EquationSource Format="TEX">\(\textrm{H}_\gamma \)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mtext>H</mtext> <mi>γ</mi> </msub> </math></EquationSource> </InlineEquation> is a power-law long-range lattice operator with uniform electric fields on <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="23_2024_1533_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mathbb {Z}\)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="double-struck">Z</mi> </math></EquationSource> </InlineEquation>, <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="23_2024_1533_Article_IEq6.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="43" /> </InlineMediaObject> <EquationSource Format="TEX">\(\textrm{V}(\omega t)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>V</mtext> <mo stretchy="false">(</mo> <mi>ω</mi> <mi>t</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation> is a time quasi-periodic perturbation. In particular, we can obtain the uniform power-law localization of the Floquet Hamiltonian operator <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="23_2024_1533_Article_IEq7.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="115" /> </InlineMediaObject> <EquationSource Format="TEX">\(-{\textbf{i}}\omega \cdot \partial _{\phi }+\textrm{H}(\phi )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>-</mo> <mi mathvariant="bold">i</mi> <mi>ω</mi> <mo>·</mo> <msub> <mi>∂</mi> <mi>ϕ</mi> </msub> <mo>+</mo> <mtext>H</mtext> <mrow> <mo stretchy="false">(</mo> <mi>ϕ</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, and the dynamical localization of the Hamiltonian operator <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="23_2024_1533_Article_IEq8.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="32" /> </InlineMediaObject> <EquationSource Format="TEX">\(\textrm{H}(t)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>H</mtext> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>. No assumptions are made on the size of the perturbation; however, we require the time quasi-periodic perturbation is a <b>“quasi-Töplitz” operator</b> (close to a Töplitz operator).</p>

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Wannier–Stark Localization for Time Quasi-Periodic Hamiltonian Operator on \(\mathbb {Z}\)

  • Shengqing Hu,
  • Yingte Sun

摘要

In this paper, we consider the time (quasi)-periodic quantum Hamiltonian of the form \(\textrm{H}(t)=\textrm{H}_\gamma +\textrm{V}(\omega t)\) H ( t ) = H γ + V ( ω t ) , where \(\textrm{H}_\gamma \) H γ is a power-law long-range lattice operator with uniform electric fields on \(\mathbb {Z}\) Z , \(\textrm{V}(\omega t)\) V ( ω t ) is a time quasi-periodic perturbation. In particular, we can obtain the uniform power-law localization of the Floquet Hamiltonian operator \(-{\textbf{i}}\omega \cdot \partial _{\phi }+\textrm{H}(\phi )\) - i ω · ϕ + H ( ϕ ) , and the dynamical localization of the Hamiltonian operator \(\textrm{H}(t)\) H ( t ) . No assumptions are made on the size of the perturbation; however, we require the time quasi-periodic perturbation is a “quasi-Töplitz” operator (close to a Töplitz operator).