Some more typo fixes
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@ -819,24 +819,23 @@ unitary evolution is uninhibited within such a degenerate subspace,
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called the Zeno subspace \cite{facchi2008, raimond2010, raimond2012,
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called the Zeno subspace \cite{facchi2008, raimond2010, raimond2012,
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signoles2014}.
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signoles2014}.
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These effects can be easily seen in our model when
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These effects can be easily seen in our model when $\gamma \rightarrow
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$\gamma \rightarrow \infty$. The system will be projected into one or
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\infty$. The system will be projected into one or more degenerate
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more degenerate eigenstates of $\cd \c$, $| \psi_i \rangle$, for which
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eigenstates of $\cd \c$, $| \psi_i \rangle$, for which we define the
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we define the projector
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projector $P_\varphi = \sum_{i \in \varphi} | \psi_i \rangle \langle
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$P_\varphi = \sum_{i \in \varphi} | \psi_i \rangle$ where $\varphi$
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\psi_i |$ where $\varphi$ denotes a single degenerate subspace. The
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denotes a single degenerate subspace. The Zeno subspace is determined
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Zeno subspace is determined randomly as per the Copenhagen postulates
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randomly as per the Copenhagen postulates and thus it depends on the
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and thus it depends on the initial state. If the projection is into
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initial state. If the projection is into the subspace $\varphi$, the
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the subspace $\varphi$, the subsequent evolution is described by the
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subsequent evolution is described by the projected Hamiltonian
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projected Hamiltonian $P_{\varphi} \hat{H}_0 P_{\varphi}$. We have
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$P_{\varphi} \hat{H}_0 P_{\varphi}$. We have used the original
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used the original Hamiltonian, $\hat{H}_0$, without the non-Hermitian
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Hamiltonian, $\hat{H}_0$, without the non-Hermitian term or the
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term or the quantum jumps as their combined effect is now described by
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quantum jumps as their combined effect is now described by the
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the projectors. Physically, in our model of ultracold bosons trapped
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projectors. Physically, in our model of ultracold bosons trapped in a
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in a lattice this means that tunnelling between different spatial
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lattice this means that tunnelling between different spatial modes is
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modes is completely suppressed since this process couples eigenstates
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completely suppressed since this process couples eigenstates belonging
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belonging to different Zeno subspaces. If a small connected part of
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to different Zeno subspaces. If a small connected part of the lattice
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the lattice was illuminated uniformly such that $\hat{D} = \hat{N}_K$
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was illuminated uniformly such that $\hat{D} = \hat{N}_K$ then
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then tunnelling would only be prohibited between the illuminated and
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tunnelling would only be prohibited between the illuminated and
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unilluminated areas, but dynamics proceeds normally within each zone
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unilluminated areas, but dynamics proceeds normally within each zone
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separately. However, the geometric patterns we have in which the modes
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separately. However, the geometric patterns we have in which the modes
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are spatially delocalised in such a way that neighbouring sites never
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are spatially delocalised in such a way that neighbouring sites never
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@ -287,15 +287,15 @@ open systems described by the density matrix, $\hat{\rho}$,
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\left[ \c \hat{\rho} \cd - \frac{1}{2} \left( \cd \c \hat{\rho} + \hat{\rho}
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\left[ \c \hat{\rho} \cd - \frac{1}{2} \left( \cd \c \hat{\rho} + \hat{\rho}
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\cd \c \right) \right].
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\cd \c \right) \right].
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\end{equation}
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\end{equation}
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The following results will not depend on the nature nor exact form of
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The following results will not depend on the nature nor the exact form
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the jump operator $\c$. However, whenever we refer to our simulations
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of the jump operator $\c$. However, whenever we refer to our
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or our model we will be considering $\c = \sqrt{2 \kappa} C(\D + \B)$
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simulations or our model we will be considering $\c = \sqrt{2 \kappa}
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as before, but the results are more general and can be applied to their
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C(\D + \B)$ as before, but the results are more general and can be
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setups. This equation describes the state of the system if we discard
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applied to their setups. This equation describes the state of the
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all knowledge of the outcome. The commutator describes coherent
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system if we discard all knowledge of the outcome. The commutator
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dynamics due to the isolated Hamiltonian and the remaining terms are
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describes coherent dynamics due to the isolated Hamiltonian and the
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due to measurement. This is a convenient way to find features of the
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remaining terms are due to measurement. This is a convenient way to
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dynamics common to every measurement trajectory.
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find features of the dynamics common to every measurement trajectory.
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Just like in the preceding chapter we define the projectors of the
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Just like in the preceding chapter we define the projectors of the
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measurement eigenspaces, $P_m$, which have no effect on any of the
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measurement eigenspaces, $P_m$, which have no effect on any of the
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